TRT Side Effects: How Common They Are, What to Watch, and When to Get Help

By TRT Provider Guide · Editorial research, not clinically reviewed · Last verified: October 2026

Last updated: October 5, 2026.

TRT side effects can include higher hematocrit, increased blood pressure, acne, swelling and reduced sperm production. Some are silent and need testing; others need urgent care. Risk depends on the product and your health, not one universal percentage. Fertility plans and existing health problems can change whether TRT is an appropriate next step. ^{1 8 9 21 22}

Here's the part most pages skip: a side effect that needs action may not feel like anything. In the FDA label for one weekly testosterone shot, 14% of men had a reported hematocrit increase within a year. That is why blood counts get checked even when you feel fine. ^{8 21}

Your own risk depends on your treatment format, your dose, your age and health, and how closely you're monitored. If you're trying to have a baby now, TRT isn't the right place to start. ^{21 22}

🚨 Call 911 now for chest pain or pressure, sudden shortness of breath, sudden weakness or trouble speaking, collapse, or signs of a severe allergic reaction. Go to an emergency department now for an erection lasting 4 hours or longer or sudden inability to pee; call 911 if you cannot get there safely. A newly swollen, painful leg needs urgent assessment the same day; leg symptoms with chest pain or breathlessness mean call 911. ^{38 39 40}

📞 Contact your prescriber promptly if your hematocrit or blood pressure came back high, someone says you stop breathing in your sleep, you notice a breast lump, your urination changes, or your mood worries you. Follow any urgent instructions from the lab or clinician rather than waiting for a routine message reply. ^{9 13 21}

🗓️ Usually not urgent: mild acne, oily skin, or mild injection-site soreness that is improving. Bring it up at your next check-in. New swelling, worsening pain, spreading redness or symptoms that concern you deserve an earlier call. ^{8 13 19}

TRT Provider Guide is the independent decision resource for testosterone replacement therapy — helping U.S. adults understand how low testosterone is evaluated, compare online and local care models and providers, and choose the next step that fits their health needs, fertility plans, budget, state, and care preferences, with every material claim verified and dated.

This page covers prescription testosterone for adult men being evaluated or treated for low testosterone. It's not about bodybuilding doses, nonmedical steroid use, care for women or teens, or gender-affirming hormone care. It's educational information, not medical advice. Best for: men considering prescribed TRT or checking a possible treatment-related problem. Not for: deciding your own dose, diagnosing a symptom, or delaying urgent care.

On this page: Most common side effects · The side-effect table · Hematocrit · Blood pressure · Heart and clots · Fertility · Prostate · Acne, hair, breasts, sleep, mood · By treatment format · When they start and stop · Who should wait · Monitoring · Published monitoring compared · FDA changes · What not to do · When to get help · FAQ

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What are the most common TRT side effects?

The Endocrine Society describes erythrocytosis—an increase in red blood cells—as the most frequent adverse event in the randomized testosterone trials it reviewed. Other important effects include higher blood pressure, PSA changes, acne, treatment-site reactions and reduced sperm production. No single percentage ranks these risks across all products and patients. ^{1 8 9 21 22}

It helps to sort TRT side effects by how you'd find out. That one change makes the whole topic less scary, because it tells you what to watch and what to leave to the lab.

That middle column is why TRT isn't a set-it-and-forget-it prescription. You can feel great and still have a number that needs attention. If you've read about "thick blood" or shrinking testicles, testosterone can cause those changes. But routine bloodwork does not measure sperm count or testicular size, and testing cannot guarantee that no problem will develop between checks. ^{8 13 21 22 51}

The right TRT provider is not the same for every person — it depends on whether low testosterone has been properly evaluated, your symptoms and health history, your fertility plans, your state, your insurance or cash-pay preference, your treatment-format preference, your budget, and whether online or in-person care is the better starting point. Some situations belong with primary care, urology, endocrinology, reproductive urology, or urgent or emergency care when the symptoms warrant it. Because a general answer cannot resolve those for you, use TRT Provider Guide's Find My TRT Path tool to map your situation to the right care route and the questions to ask before you pay.

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TRT side effects at a glance: how often were they reported, and what needs attention?

This table brings together important TRT side effects, product-specific study rates, detection methods and clinical action points. The studies used different patients, definitions and follow-up periods, so the percentages are not a head-to-head safety ranking. Use it to know what to ask about, not to predict your personal risk or interpret your own results.

We built this table by bringing several sources together. The "how often" numbers come from clinical-trial tables in testosterone prescribing information, published studies and TRAVERSE. The action points distinguish American Urological Association (AUA) and Endocrine Society guidance from product-label instructions. The 14 testosterone labels listed in the sources include older prescribing-information versions that remain posted on DailyMed; a recent website update is not necessarily a new label revision.

How to read the numbers: each figure comes from a specific product and group of men, with a defined follow-up period. A reported hematocrit increase is not necessarily a value above 54%, and a reported PSA increase is not a cancer diagnosis. The studies cannot be pooled into one chance of side effects or used to rank treatment formats by safety. Placebo numbers are shown when the source reported them.

What we actually verified

Checked on October 5, 2026.

Sources checked: the 14 testosterone prescribing-information records listed below; FDA testosterone notices and the June 2026 HHS announcement; Endocrine Society guidance; published AUA and AUA/ASRM guideline recommendations; original studies on cardiovascular, prostate, fertility, fracture, mood and sexual-function outcomes; the federal telemedicine extension; and official pricing, lab and policy pages for Hone Health, Male Excel and Taurus Meds.

Verified in the accessible primary records: the label figures cited in the tables, product-specific warnings and revision dates, the distinction between a requested label change and revised prescribing information, study populations and endpoints, and the public statements used in the program comparison.

Provider-stated, not independently confirmed: actual lab delivery, follow-up timing, clinician availability and side-effect handling. This was not a patient-account, purchase, support-response, individual-license or clinical-outcome audit. Conflicting public price and policy statements are shown rather than resolved by guessing.

What we do not claim: a single "chance of side effects" for TRT in general, that TRT is free of heart risk, that TRT causes prostate cancer, that every side effect reverses, or that one monitoring schedule fits every man and every product.

Not sure which rows apply to you? That depends on your treatment format, health history and fertility plans, and the table can't sort that out for you.

Get my TRT action plan → Find My TRT Path maps your situation to a care route and the monitoring questions to ask. It's free and educational. It doesn't diagnose low testosterone or read your lab results.

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Can TRT make your blood too thick?

Yes. Testosterone signals your body to make more red blood cells, which raises hematocrit, the share of your blood made up of red cells. The AUA uses ≥54% as an intervention point; the Endocrine Society uses >54% for clinician-directed interruption and evaluation. A high hematocrit can be symptom-free, so a blood test is needed to measure it. ^{8 20 21}

"Thick blood" is a common way to describe this concern. A hematocrit increase is an important lab problem on TRT, and you may not feel it. ^{8 21}

How common is a high hematocrit on TRT?

It depends heavily on the treatment format.

• In the FDA label for Xyosted, a weekly shot under the skin, 14.0% of men had "hematocrit increased" over one year. Across its two studies, 12 of 283 men reached 55% or higher. ⁸
• The label rates are not directly comparable: AndroGel 1.62% reported increased hematocrit or hemoglobin in 2.1% over 182 days; Jatenzo reported increased hematocrit in 4.8% over 4 months, and Tlando in 4.3% over 4 months. ^{9 16 18}
• In a real-world study of 48,671 men on TRT, 12.1% developed a hematocrit of 52% or higher. ²⁹
• In one small clinic study, hematocrit rose above 50% in 66.7% of men on injections, 35.1% on pellets and 12.8% on gels. It was a retrospective, single-center comparison followed for up to three years, and the groups differed at baseline. Treat it as a signal, not a precise forecast or a randomized safety ranking. ³⁰

The AUA guideline says the same thing in plainer terms: the largest red-blood-cell increases in trials came with injected testosterone. ²⁰

Is a high hematocrit dangerous?

It can be. In that 48,671-man study, researchers matched 5,842 men who developed hematocrit ≥52% with 5,842 who did not. The combined rate of major cardiovascular events or venous blood clots during the first year was 5.15% vs 3.87%. That's an association, not proof that hematocrit caused the events, and it does not show that each individual outcome rose by the same amount. ²⁹

The numbers clinicians use

Several current product labels instruct clinicians to interrupt treatment for an elevated hematocrit until it falls to an acceptable level, without giving a numerical cutoff in that instruction. Product-specific monitoring and guideline thresholds therefore need to be read together. ^{8 16 17 18 21}

What usually happens if it's high

Your clinician has several options: recheck it, assess causes such as low oxygen or sleep apnea, adjust or hold the prescription, change treatment formats, or refer you to a blood specialist (hematologist). In selected cases, clinicians may consider therapeutic phlebotomy—removing blood as a medical treatment. ^{20 21}

One thing not to do: change your dose or start donating blood on your own to push the number down. Advice to donate immediately skips the part where someone figures out why it went up. Call your prescriber first.

For the full lab schedule, see our TRT blood-test guide.

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Does TRT raise blood pressure?

Testosterone can raise blood pressure, sometimes without symptoms. In February 2025 the FDA required new or strengthened blood-pressure warnings after reviewing 24-hour blood-pressure studies across testosterone products. Average systolic rises in the studies below were about 2 to 5 mmHg, but individual changes can be larger. ^{1 8 9 11 12 16 17 18}

High blood pressure usually has no symptoms. A headache doesn't prove your pressure went up, and feeling fine doesn't prove it didn't. ¹

Here's what each product's own 24-hour blood-pressure study found. These are changes from baseline, in mmHg, not randomized comparisons between products; patients and study methods differed.

Two numbers stand out. In the one-year Xyosted study, 10% of men started or changed blood-pressure medicine. In the four-month Jatenzo study, 7.2% did. The different follow-up periods matter. ^{8 16}

Who should be most careful

If you already have high blood pressure, tell the prescriber before you start. The updated product labels cited in the blood-pressure table say testosterone is not recommended with uncontrolled hypertension and call for periodic blood-pressure checks. They do not establish one fixed check-in week for every patient. ^{8 9 11 12 16 17 18}

What to do

A home blood-pressure cuff can help you bring actual measurements to follow-ups. Ask your clinician which device to use and how to take and record readings correctly. If they climb, that's a conversation for your prescriber, not a reason to adjust anything yourself.

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Does TRT cause heart attacks, strokes or blood clots?

The largest dedicated cardiovascular safety trial, TRAVERSE, studied about 5,200 men aged 45 to 80 with heart disease or high heart risk. Cardiovascular death, nonfatal heart attack or nonfatal stroke occurred in 7.0% with testosterone gel and 7.3% with placebo, meeting the trial's noninferiority criterion. Some other outcomes—including pulmonary embolism, atrial fibrillation, kidney injury and fractures—were reported more often with testosterone. ^{9 24 26}

Older warnings can make this question confusing. In February 2025 the FDA required removal of the earlier cardiovascular boxed-warning language based on TRAVERSE. At the same time, it required new or strengthened blood-pressure warnings. So the honest answer isn't "TRT is bad for your heart" or "TRT is safe for your heart." It's narrower than both. ¹

What TRAVERSE found

The fracture result stands out, because testosterone can improve bone density in some men but did not prevent fractures in this trial. The table includes both the cardiovascular trial's safety findings and its separate fracture study; it does not establish that TRT caused every reported event. ^{21 26}

What TRAVERSE didn't test

Men in TRAVERSE were randomly assigned to testosterone 1.62% gel or placebo gel. They were 45 to 80, had heart disease or high heart risk, and had symptoms plus two low fasting testosterone measurements before entering. Average treatment lasted about 22 months and average follow-up about 33 months. The results don't automatically apply to: ²⁴

• younger men,
• every injectable or other testosterone product, or higher-than-prescribed exposure,
• compounded products, which are not FDA-approved or reviewed by FDA for safety, effectiveness or quality before marketing,
• treatment lasting decades.

Old headline vs. what the evidence says now

Know the clot warning signs

A clot in a leg vein (deep vein thrombosis) can cause swelling, pain, warmth or redness in one leg, often the calf. A clot that travels to the lungs (pulmonary embolism) can cause sudden shortness of breath, chest pain that's worse when you breathe in, a fast heartbeat, or coughing up blood. ³⁸

A possible leg clot needs urgent assessment the same day. Symptoms of a lung clot need emergency care: call 911. Don't send a message through a TRT app and wait for a reply. ³⁸

A high hematocrit result on a lab report is not the same as having a clot. Contact the clinician promptly and follow any urgent instructions attached to the result. Chest pain, sudden breathlessness or stroke symptoms are emergencies even if recent labs were normal. ^{21 38}

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Does TRT cause infertility or shrink your testicles?

It can. Testosterone from outside the body can suppress LH and FSH, the hormone signals needed for normal sperm production; sperm counts may fall to zero and the testicles can get smaller. Recovery is variable and not guaranteed, so current and future fertility plans belong in the decision before treatment—not after a subscription starts. ^{9 13 21 22 51}

This is a side effect to understand before you pay anyone.

Why it happens

Your pituitary gland, at the base of the brain, makes two hormones that help run your testicles. Luteinizing hormone (LH) tells them to make testosterone. Follicle-stimulating hormone (FSH), together with testosterone inside the testicles, supports sperm production. Testosterone from a shot, gel or capsule can suppress those signals. Sperm production (spermatogenesis) may slow, and testicular size may decrease. ^{13 21 22}

How much it drops

Researchers tested testosterone-induced sperm suppression as male contraception in healthy volunteers. In a World Health Organization study, weekly testosterone injections reduced sperm counts enough for many men to enter a contraceptive study, but some did not suppress adequately and pregnancies occurred in men who still had sperm. Sperm output recovered after treatment in that study. These were healthy volunteers in a research protocol, not proof of predictable fertility recovery after long-term TRT. ³²

FDA labels warn that exogenous testosterone can suppress sperm production. You may not feel that change: libido and erections do not tell you your sperm count. TRT is not reliable birth control. ^{9 13 32}

Does it come back after stopping?

Recovery can be slow, but hormone recovery is not the same as sperm recovery. A 2022 follow-up included 303 men from a two-year trial of long-acting testosterone undecanoate or placebo; participants had glucose intolerance but not pathological hypogonadism. It measured reproductive hormones and sexual-function questionnaires, not semen recovery or pregnancy. Hormone recovery after testosterone was gradual over about 15 months after the last injection, so this study cannot promise when an individual man's fertility will return. ³¹

If you want kids now or later

• Trying now: The AUA recommends against prescribing exogenous testosterone to men trying to conceive. AUA/ASRM fertility guidance also warns against using testosterone alone when current or future fertility matters; adding another drug is not a fertility guarantee. ^{20 22}
• Maybe later: Ask whether semen analysis and sperm banking before treatment make sense for you. Banking before suppression avoids having to depend on later recovery; it is not true that banking is always impossible after TRT has started. ^{21 22}
• Other medicines: Some clinicians use hCG or clomiphene in selected men. hCG has FDA-approved uses for selected hormonal conditions in men; clomiphene is approved for ovulatory dysfunction in women, and its use for male hypogonadism or infertility is off-label. Compounded enclomiphene is not FDA-approved. These are not TRT, they are not interchangeable, and none comes with a fertility guarantee. Read our TRT and fertility guide before you choose. ^{6 22 42 43}

Planning a baby in the next year or two? Start with a urologist or reproductive urologist, not a general online TRT subscription. Map a fertility-first care route →

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Does TRT cause prostate cancer?

Current evidence does not establish that TRT causes prostate cancer, but it also does not prove zero lifelong risk. In the TRAVERSE prostate study, high-grade cancer occurred in 0.19% with testosterone and 0.12% with placebo, a difference that was not statistically significant. These findings came from carefully screened men, and prostate monitoring depends on age, risk and clinical circumstances. ^{21 25}

What TRAVERSE's prostate study found

In about 5,200 men, the study found no statistically significant differences in any prostate cancer, acute urinary retention, prostate biopsy or change in urinary symptom scores. PSA increased more with testosterone. Men with a history of prostate cancer, PSA above 3 ng/mL or severe urinary symptoms were excluded, so the results do not settle safety for those groups. The AUA guideline advises clinicians that evidence has not established a link between TRT and developing prostate cancer. ^{20 25}

PSA is a warning light, not a diagnosis

PSA (prostate-specific antigen) is a protein made by the prostate. A rise can come from an enlarged prostate, inflammation or cancer. On TRT, a small rise is common. The Endocrine Society sets the line for a urology referral during the first year: ²¹

• a confirmed PSA rise of more than 1.4 ng/mL above the starting level in year 1, or
• a confirmed PSA above 4.0 ng/mL, or
• a rectal exam finds something abnormal. ²¹

An unexpected PSA result may need repeat testing before referral because temporary elevations can occur; the clinician should also consider the starting PSA and risk factors.

The AUA says to measure PSA before starting in men over 40. ²⁰

An enlarged prostate isn't cancer

Benign prostatic hyperplasia (BPH) means the prostate has grown without cancer. It can make peeing slower or more frequent. The product labels cited here include monitoring warnings for men with BPH. If you suddenly cannot pee at all, get medical care immediately. ^{9 17 39}

What changed in June 2026

On June 18, 2026, HHS announced that the FDA had asked testosterone makers to update their labels. The request included limiting the prostate-cancer contraindication to metastatic disease and revising the BPH warning. A request is not the same as a completed label revision: the Kyzatrex prescribing information revised in August 2026 still lists known or suspected prostate cancer as a contraindication. A clinician needs to check the exact current product label and your cancer history, not treat a press release as permission to start. ^{3 17}

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Other TRT side effects: acne, hair loss, breasts, swelling, sleep, mood and erections

Beyond hematocrit, blood pressure and fertility, testosterone labels report acne and oily skin, scalp hair loss, breast changes, swelling, sleep-apnea effects and mood or libido changes. These are not equally likely in every person or product. Several deserve a call to your prescriber rather than a fix you find online. ^{8 9 13}

Does TRT cause acne?

Yes, it can. Testosterone can make skin oilier. In the selected label trials cited above, acne ranged from 2.7% with Xyosted to 8% at the highest studied AndroGel 1% dose; those are separate studies, not a universal range. Severe or painful cystic acne is worth raising with your prescriber, because treatment-related factors may be part of the problem. ^{8 10 13}

Does TRT cause hair loss?

It can. The Depo-Testosterone label lists "male pattern of baldness" among reported reactions. Labels don't give a percentage or say who is most at risk. If male-pattern baldness runs in your family, it's a fair question to ask before you start. ¹³

Does TRT cause breast growth (gynecomastia)?

It can occur. Some testosterone converts into estradiol, a form of estrogen, and breast tissue can respond. Breast tenderness may settle, but established gynecomastia—growth of breast tissue—can persist. ^{13 20}

Get a new breast lump checked, especially if it is one-sided, hard or comes with nipple discharge. Do not self-diagnose "high estrogen" or add an aromatase inhibitor on your own. An estrogen-blocking drug is not an automatic part of TRT; if a program adds one, ask what specific problem it is treating and how its own risks will be monitored. ^{20 22}

Does TRT cause weight gain or swelling?

Some men hold extra water. Peripheral edema showed up in 2.7% of men in the one-year Xyosted study. Labels warn that swelling can be serious for men with heart, kidney or liver disease. New swelling deserves a prompt call; sudden or severe shortness of breath, especially with chest pain, means emergency care. ^{8 13 38}

Can TRT make sleep apnea worse?

It can. The AndroGel 1.62% label warns that testosterone may worsen sleep apnea, especially in men with risk factors such as obesity or chronic lung disease. The Endocrine Society recommends against starting TRT in men with untreated severe sleep apnea. ^{9 21}

Watch for loud snoring, a partner noticing you stop breathing, morning headaches or worse daytime sleepiness. And here's a trap: if fatigue comes back on TRT, it doesn't automatically mean your dose is too low. Untreated sleep apnea causes fatigue too. ^{9 21}

Does TRT cause anger, anxiety or mood swings?

Some men report it. Emotional lability occurred in 2.6% with AndroGel 1.62% versus 0% with placebo in its 182-day trial, and the Depo-Testosterone label lists anxiety and depression among reported reactions. A TRAVERSE analysis found modest mood and energy improvements in a broader group with depressive symptoms, but no significant benefit in a small subgroup of 49 men with low-grade persistent depressive disorder; that small analysis was underpowered. It was not evidence that TRT treats major depression or replaces mental-health care. ^{9 13 27}

If you have thoughts of harming yourself, call or text 988 (Suicide & Crisis Lifeline) any time. ⁴¹

Does TRT cause erectile dysfunction?

Erectile dysfunction has many causes and is not a reliable sign that TRT itself caused a problem. In TRAVERSE's sexual-function study, testosterone improved sexual activity and desire in men with low libido, but it did not improve erectile function compared with placebo. Labels list both increased and decreased libido, and warn about erections that are too frequent or last too long. An erection lasting 4 hours or longer needs emergency-department care. ^{13 28 40}

Can TRT affect the liver?

Older 17-alpha-alkylated oral androgens, such as methyltestosterone, have been linked to serious liver problems; they should not be confused with the oral testosterone undecanoate products in the table. Testosterone labels also discuss liver-related adverse reactions, without proving the same risk for every formulation. Yellowing skin or eyes needs prompt medical assessment. ^{13 16 20}

Rare things worth knowing

• Blood thinners: The Depo-Testosterone label warns that testosterone can increase bleeding risk in men taking anticoagulants. Tell your prescriber if you take one. ¹³
• Vision: The Depo-Testosterone label lists rare reports of central serous chorioretinopathy, a fluid buildup behind the retina. New blurry or distorted vision needs urgent assessment; sudden vision loss is an emergency. Do not assume the cause is TRT. ¹³
• Cholesterol: HDL ("good") cholesterol dropped in 3.0% of men in the Jatenzo study. ¹⁶

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TRT side effects by treatment format: injections vs gel vs oral vs pellets

Testosterone products share important risks, but treatment formats add different problems. Injectable products can produce larger hematocrit increases, gels can transfer testosterone through skin contact, and the long-acting injection Aveed carries a boxed warning for serious injection-related reactions. The blood-pressure figures above are product-specific observations, not proof that every oral product is riskier than every gel or injection. ^{9 12 20}

There's no format without side effects. The useful question is which set of side effects fits your life and your monitoring.

Read the revision date, not just the website date. For example, the Vogelxo record was updated on DailyMed in July 2025, but the prescribing information printed in that record says April 2020. Historical brand names or posted labels also do not prove that a particular pharmacy currently stocks a product. ³⁶

What to watch first, by format

Gel transfer is a real household risk

Gel labels carry a boxed warning because children exposed to treated skin have developed male sex traits (virilization). Labels tell users to wash their hands after applying, cover the area with clothing once it dries, and wash the application site before expected skin contact. Follow the instructions for the exact product. Compounded topical testosterone also needs precautions against exposing others; it does not have an FDA-approved label establishing equivalent handling instructions or safety. ^{6 9 10 11 34 36}

Compounded vs FDA-approved: why it matters here

A compounded drug is prepared by a compounder rather than supplied as an FDA-approved finished product. The FDA says compounded drugs are not FDA-approved and are not reviewed for safety, effectiveness or quality before marketing. That means none of the product-specific side-effect percentages on this page establish the rate for a compounded preparation. The AUA guideline favors commercially manufactured testosterone rather than compounded testosterone when possible. ^{6 20}

Compare formats side by side in our TRT injections vs gel guide or the full treatment-options guide.

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When do TRT side effects start, and do they go away?

Injection soreness or skin irritation can begin soon after use; blood-pressure, hematocrit and other changes may develop over time. A scheduled three- or six-month check is a monitoring interval, not proof that a side effect cannot start earlier. Whether a problem resolves depends on its cause, the product, your health and clinician-directed care. ^{8 9 12 21}

What happens when you stop TRT

What happens after TRT depends partly on why testosterone was low before treatment. In the 2022 follow-up of 303 men assigned to long-acting testosterone undecanoate or placebo, reproductive hormones recovered gradually after the testosterone injections ended. The study did not measure sperm recovery. Sexual-function questionnaire differences between the treatment groups were no longer apparent after 18 weeks of follow-up—not proof that every participant's sexual function returned to a particular baseline. ³¹

"Am I stuck on TRT for life?"

Not necessarily. But some men have an underlying condition that continues to require treatment, and a return of natural testosterone production cannot be promised. That is a reason to make the decision carefully before you start, not a reason to panic if you are already on it. Do not follow an online "restart" protocol. Ask your prescriber for a plan, and seek emergency care first when symptoms warrant it. ^{21 31}

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Who should not start TRT without seeing a specialist first?

The Endocrine Society recommends against starting testosterone in several situations, including near-term fertility plans, breast or prostate cancer, unexplained high PSA or a prostate lump, elevated hematocrit, untreated severe sleep apnea, severe urinary symptoms, uncontrolled heart failure, a heart attack or stroke within six months, or thrombophilia. Thrombophilia means a tendency to form blood clots—not every disorder that affects blood. These situations need appropriate evaluation rather than automatic approval from an online questionnaire. ²¹

If one of these fits you, a quick online subscription is the wrong starting point. The right clinician depends on the problem; these are care-route examples, not a tool that clears you for treatment.

That last row matters more than people think. A low result by itself does not establish that TRT is appropriate. Guidelines call for compatible symptoms or signs plus consistently low testosterone on reliable testing, with repeat early-morning measurements. The Endocrine Society recommends fasting morning testing; results, assay limitations and the cause of low testosterone need a clinician's review, not one cutoff or a quiz. ^{20 21}

Does one of these sound like you? Find out which kind of clinician to start with and what to bring to the appointment. Explore my care-route options →

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What monitoring catches TRT side effects early?

Good TRT monitoring checks more than your testosterone level. It includes blood counts, blood pressure, symptoms and benefit, with prostate and fertility assessment based on the patient's situation. The exact follow-up schedule depends on the product and prior results; a normal testosterone number does not mean the other checks are done. ^{8 9 20 21 22}

Before you start

• Compatible symptoms or signs and repeat early-morning testosterone tests supporting the diagnosis
• Hematocrit (from a complete blood count, or CBC)
• Prostate-risk discussion and PSA when appropriate; the AUA recommends a baseline PSA in men over 40, while the Endocrine Society uses age, risk and a discussion about monitoring
• Blood pressure
• A frank conversation about current and future fertility, with semen analysis or specialist referral when indicated
• Sleep apnea screening if you snore or feel tired all day ^{20 21 22}

After you start

"My testosterone is normal now" isn't the finish line

This is an easy blind spot to fall into. A program can hit a perfect testosterone number while your hematocrit creeps toward 54% or your blood pressure climbs. When you ask "how are my labs?", ask about all of them. ^{8 21}

Timing the testosterone test

When the blood is drawn changes the result. Injectable testosterone levels vary across the interval between doses, and gels, oral products and pellets have different sampling instructions. Ask your clinician when your draw should happen for your product; a value cannot be interpreted well without that timing. ^{8 9 16 21}

For the full schedule, read our TRT blood-test guide.

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Which online TRT programs publish their side-effect monitoring?

A published lab panel helps you ask better questions, but it does not prove that a program delivers safer care. Among these three public-source examples, Hone gives the clearest posted Premium panel and first-year testing schedule; Male Excel and Taurus leave different questions unanswered. Blood pressure requires a measurement, and estradiol is not a substitute for it. ^{21 33 34 35 44 45 46}

This table shows only what each program publishes. A program may check more than it lists, so ask before you pay. "Not found in the pages checked" is a limit of this review, not proof that a service is never provided. Program statements were checked on October 5, 2026.

The cost details that change the decision: Hone's Premium plan and schedule pages list a $25 TRT confirmatory test, but a separate retesting article says clinically necessary retesting is free. Its testosterone sales page advertises medication from $28 per month, while the newer Premium help page lists testosterone cypionate from $28 per vial. A vial is not necessarily a month's supply. Using the $25 test and assuming $28 every month would produce $2,286 for year one, but that is a conditional calculation, not a verified complete price. Hone also offers a $135 Plus plan; the $155 Premium option is not its only TRT tier. ^{33 44 45 49}

Male Excel's $120 medication example includes thyroid treatment and starts at an advertised price; it should not be presented as the necessary treatment for every man. Taurus's offer says there are no membership fees, while its terms list a recurring fee unless checkout overrides it. Those conflicts are reasons to obtain a written, itemized quote—not to call one program cheaper or safer. ^{34 35}

The honest tradeoff before you choose an online program

The testosterone product described on Hone's linked sales page is compounded, which means FDA has not reviewed that preparation for safety, effectiveness or quality before marketing. If an FDA-approved product or insurance coverage is your priority, choose a clinician and dispensing path that actually offers it. That can be local care or a qualifying telehealth practice; online care is not automatically compounded. Map that route with Find My TRT Path. ^{6 33}

For a man considering online care, the useful part of Hone's disclosure is a named CBC, PSA and hormone panel plus a first-year schedule. That does not establish faster treatment of abnormal results, fewer side effects or better clinician access than a competitor. Ask who reviews your blood pressure and labs, how soon you are contacted, and what happens if care needs to move in person. ^{45 46}

If close monitoring is what you're after, compare the whole plan—not just the panel. Take the questions below to the clinician before you pay. Compare my care route and monitoring questions → Find My TRT Path is educational and non-diagnostic. It does not clear medical risks or guarantee a prescription. Current fertility plans or a need for specialist care should change the starting point.

10 questions to ask any TRT program about side effects

Save or print these questions. A program should be able to explain its answers before you commit.

1. How was my low testosterone confirmed, and do you require repeat morning tests?
2. Exactly which product will I get? Is it FDA-approved or compounded, and which pharmacy makes it?
3. Which labs do you repeat, and how often in the first year?
4. Is hematocrit on every follow-up panel?
5. What do you do if my hematocrit reaches 54%?
6. Do you check my blood pressure, or should I send home readings?
7. How do you handle PSA, and when do you refer to a urologist?
8. What happens if I want to have kids?
9. How fast can I reach a clinician about a side effect, and what's after-hours?
10. Can I get copies of my labs and records if I leave?

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What changed at the FDA in 2025 and 2026?

In February 2025 the FDA required testosterone-label changes covering TRAVERSE, removal of earlier cardiovascular boxed-warning language and blood-pressure warnings. In June 2026 it requested additional changes involving age-related hypogonadism, prostate cancer and BPH. Those requests are not interchangeable with an updated label for a particular product; the August 2026 Kyzatrex label still retains the earlier contraindication and limitation language. ^{1 3 17}

Professional guidance and product labels can change on different dates. Check the published guideline and the exact prescribing information in force for the product, rather than assuming a press announcement has replaced either one. ^{1 3 17 21}

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What should you not do if you notice a side effect?

Do not change your prescription, add an estrogen blocker or repeatedly donate blood to manage a result based on internet advice. For a nonemergency, contact the prescribing clinician and follow the medication instructions. Emergency symptoms come first: seek urgent or emergency care rather than waiting for permission through an app. ^{9 21 38}

Online forums are full of fixes. Some are harmless. Some aren't. Skip these:

• Changing your dose based on someone else's results.
• Adding anastrozole or another estrogen blocker on your own. It is not a default part of every TRT prescription.
• Donating blood repeatedly to manage hematocrit without your clinician knowing.
• Using someone else's testosterone. Testosterone is a Schedule III controlled substance in the United States and requires a valid prescription. ^{13 37 50}
• Judging one lab result in isolation. Timing, hydration and the lab itself can move a number. ²¹

Write down what you notice and when it started, and send it to your prescriber unless symptoms call for faster care. Include your product name and any recent lab or blood-pressure results; do not wait for a routine portal reply in an emergency.

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When should you call 911, get same-day care or message your prescriber?

Chest pain, sudden breathlessness, stroke signs, collapse or a severe allergic reaction need emergency help. A possible leg clot needs urgent same-day assessment; an erection lasting 4 hours or longer or sudden inability to pee needs immediate medical care. Other changes should reach the prescriber promptly, with any urgent lab instructions followed rather than ignored. ^{38 39 40}

Call 911 now

• Chest pain, pressure or tightness
• Sudden shortness of breath, or chest pain when you breathe in
• Stroke signs: face drooping, arm weakness, trouble speaking
• A swollen, painful leg together with sudden breathlessness, chest pain or collapse
• Fainting or collapse
• Throat tightness, trouble breathing, or swelling of the face after a shot

Go to an emergency department now

• An erection lasting 4 hours or longer
• Sudden inability to pass urine, especially with lower-abdominal pain

Call 911 if you cannot get there safely. Do not wait for a TRT app reply. ^{39 40}

Get same-day care

• A newly swollen, painful, warm or red leg, even without chest symptoms
• New or worsening swelling; use emergency care instead if breathing trouble is sudden or severe
• A red, hot, spreading area or pus at an injection or pellet site
• Yellow skin or eyes
• New blurry or distorted vision; sudden vision loss is an emergency ^{13 38}

Message your prescriber promptly

• Hematocrit or blood pressure came back high; follow urgent instructions from the clinician or lab
• A breast lump or new breast tenderness
• Slower or more frequent peeing
• Loud snoring, stopped breathing at night, or worse daytime sleepiness
• Mood changes that worry you or your family
• Acne that's painful or spreading
• Any side effect that's making you want to quit

If you are having thoughts of suicide, call or text 988 in the United States. Call 911 for immediate physical danger or a life-threatening emergency. ⁴¹

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TRT side effects: frequently asked questions

The key questions are whether a change needs urgent care, which test can detect it and what the evidence actually says. These answers explain the general issues; they do not interpret your results or set your treatment plan.

What is the most common side effect of TRT?

The Endocrine Society identifies erythrocytosis as the most frequent adverse event in the randomized trials it reviewed, but that does not supply one rate for all products. Increased hematocrit is an important lab effect: 14% of men in the one-year Xyosted study had a reported increase, which did not necessarily mean hematocrit reached an intervention threshold. Acne, BP changes, PSA changes and sperm suppression also matter, but study rates and definitions differ. ^{8 9 21 22}

When do TRT side effects start?

Skin or injection reactions may begin soon after treatment. Blood-pressure, hematocrit, PSA and sperm changes have different timelines, and the first scheduled follow-up is not the earliest time a problem can occur. Follow the product-specific monitoring plan and report new symptoms sooner. ^{8 9 21}

Do TRT side effects go away?

Some improve after clinician-directed treatment changes, but recovery depends on the effect and its cause. Hormone recovery, sperm recovery, testicular size and breast changes cannot be assigned one common timeline. Do not assume that stopping testosterone will automatically reverse every problem. ^{13 21 22 31}

Is TRT safe long term?

TRAVERSE provides important cardiovascular safety evidence over an average of about 33 months, not decades. It met its noninferiority goal for major cardiovascular events, while several other safety outcomes were more frequent with testosterone. It does not answer every lifelong or product-specific risk question, so ongoing monitoring is part of the deal. ^{9 24 26}

Does TRT cause heart problems?

In TRAVERSE, cardiovascular death, nonfatal heart attack or nonfatal stroke occurred at similar rates with testosterone gel and placebo: 7.0% vs 7.3%. Atrial fibrillation was reported more often, 3.5% vs 2.4%, and FDA required class-wide BP warnings. That is not a guarantee that every individual will have only a small BP rise. ^{1 9 24}

Does TRT cause prostate cancer?

Current evidence does not establish that TRT causes prostate cancer. High-grade cancer was rare and not statistically different between groups in TRAVERSE, but the trial excluded men with important prostate-risk findings and cannot prove zero lifelong risk. PSA and prostate monitoring depend on age, risk and the clinical plan. ^{21 25}

Will TRT make me infertile?

It can suppress sperm production, sometimes to zero. Recovery varies and cannot be guaranteed; sexual function does not show whether sperm production is normal. Discuss current or future fertility before treatment, and do not use TRT as birth control. ^{9 21 22 32}

Does TRT shrink your testicles permanently?

Testicular size can decrease during testosterone use. That change does not establish permanent infertility, and neither size recovery nor sperm recovery can be promised for an individual. A fertility-focused clinician can assess the question with the right history, exam and testing. ^{22 51}

What hematocrit level is too high on TRT?

The AUA uses hematocrit ≥54% as an intervention point. The Endocrine Society advises clinician-directed interruption at >54% until a safe level is reached and causes such as hypoxia or sleep apnea are assessed. AUA guidance also calls for evaluation before starting when baseline hematocrit exceeds 50%; none of these cutoffs is a self-treatment instruction. ^{20 21}

Can I stop TRT once I start?

Starting does not automatically mean lifelong treatment, but stopping needs a clinician's plan based on why testosterone was low, the product and any side effects. Natural hormone recovery is not guaranteed, particularly when an underlying cause remains. For emergency symptoms, get care immediately rather than waiting for that discussion. ^{21 31 38}

Are injections or gels safer?

Neither is safer across the board. Injections can produce greater hematocrit increases, while gels carry a boxed warning about secondary skin exposure. The blood-pressure studies cannot be used as head-to-head proof that one format is safest. The right fit depends on your health, fertility plans, exact product and monitoring. ^{1 9 20}

Can an online provider prescribe testosterone without an in-person visit?

Under the fourth federal temporary extension, a qualifying DEA-registered practitioner may prescribe Schedule II–V controlled medication without a prior in-person evaluation through December 31, 2026, using audio-video telemedicine and meeting the rule's conditions. Prescriptions must serve a legitimate medical purpose, and applicable state law and clinician policies still apply. This is not permission for questionnaire-only testosterone prescribing or a guarantee of approval; recheck the rules before care after that date. ⁷

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How did we research this page?

We compared 14 testosterone prescribing-information records, guideline recommendations, original trial reports and official provider disclosures. Public-source research can check what is written; it cannot establish how a clinician handled an individual patient's care. The product and provider records in the tables were checked on October 5, 2026.

TRT Provider Guide is the independent decision resource for testosterone replacement therapy care. This page follows our published method, How We Review TRT Providers. We keep four kinds of information separate:

• Verified facts, such as a number in a product label or a study outcome, traced to the original record.
• Provider-stated facts, such as an advertised panel, price or consultation schedule. Confirming that a page says it is not independent proof of delivery.
• Customer-experience signals, which we didn't use on this page because patient stories can't show whether a treatment is safe.
• Editorial conclusions, such as which questions a public disclosure leaves unanswered. They are not medical scores or evidence that a provider is safer.

Important limits. This page has not been clinically reviewed. Label percentages come from different studies and cannot predict your own risk or rank products fairly against each other. Public program details may conflict or change, so confirm an itemized quote, monitoring plan and cancellation process before paying. See our editorial standards and medical disclaimer.

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Where can you check the sources?

The records below let you check the numbers and their limits yourself. Label citations identify the prescribing-information revision—not simply the day DailyMed updated its webpage—and provider pages establish public claims rather than independently verified care.

1. FDA. Class-wide labeling changes for testosterone products. February 28, 2025. TRAVERSE, cardiovascular boxed-warning changes and ambulatory blood-pressure findings.

2. FDA. Testosterone information. Content current as of June 23, 2026. Official testosterone safety and labeling chronology.

3. HHS. FDA requests updates to testosterone therapy labeling. June 18, 2026. Requested age-related, prostate-cancer and BPH changes; not evidence that each label has been revised.

5. FDA. FDA takes step forward on testosterone therapy for men. April 16, 2026. Invitation to pursue a potential new indication, not a new approval.

6. FDA. Compounding and the FDA: questions and answers. Compounded preparations are not FDA-approved and do not undergo FDA premarket review.

7. DEA/HHS. Fourth temporary extension of COVID-19 telemedicine flexibilities. 90 FR 61301; December 31, 2025. Effective January 1–December 31, 2026; conditions for prescribing without a prior in-person evaluation.

8. Xyosted prescribing information. Revised July 2025. Warnings and precautions; adverse-reaction Tables 1–2; hematocrit, blood-pressure and PSA sections.

9. AndroGel 1.62% prescribing information. Revised October 2025. Boxed warning; sections 5–6; 182-day trial, ABPM and TRAVERSE findings.

10. AndroGel 1% prescribing information. Revised October 2025 in the record checked. Secondary exposure and dose-group adverse-reaction table.

11. Testim prescribing information. Revised July 2025. Secondary exposure, breast events, and blood-pressure study including treated-hypertension subgroup.

12. Aveed prescribing information. Revised July 2025. Boxed warning and restricted program; ABPM; adverse reactions; pooled POME/anaphylaxis findings.

13. Depo-Testosterone prescribing information. Revised September 2025. Warnings, precautions, interactions, adverse reactions and Schedule III status.

14. Azmiro prescribing information. Revised July 2025. Adverse reactions: 27-person study and injection-site redness.

15. Natesto prescribing information. Revised July 2025. Nasal adverse reactions and general testosterone warnings.

16. Jatenzo prescribing information. Revised September 2025. ABPM overall and treated-hypertension subgroup; 4-month adverse-reaction table.

17. Kyzatrex prescribing information. Revised August 2026. Month-4 ABPM, contraindications, limitation of use and monitoring.

18. Tlando prescribing information. Revised February 2026. ABPM and 4-month adverse-reaction data.

19. Testopel prescribing information. Revised July 2025. Implant-site infection and extrusion; precautions.

20. American Urological Association. Testosterone Deficiency Guideline. Baseline and follow-up testing, hematocrit, PSA, formulation and fertility recommendations.

21. Bhasin S, et al. Testosterone therapy in men with hypogonadism: Endocrine Society clinical practice guideline. JCEM. 2018;103:1715–1744. Recommendations 1.1, 2.2 and 3.1–3.2; Tables 7–9; diagnosis, contraindications, hematocrit and prostate monitoring.

22. AUA/ASRM. Diagnosis and treatment of infertility in men, Part II. Published society guidance on exogenous testosterone, current/future fertility and selected hormonal alternatives.

24. Lincoff AM, et al. Cardiovascular safety of testosterone-replacement therapy. NEJM. 2023;389:107–117. TRAVERSE population, primary composite and follow-up. Prescribing information in source 9 also reports its safety outcomes.

25. Bhasin S, et al. Prostate safety events during testosterone replacement therapy. JAMA Network Open. 2023;6:e2348692. Participant exclusions, high-grade cancer, PSA and urinary outcomes.

26. TRAVERSE fracture results in AndroGel 1.62% prescribing information. Clinical fractures: 3.5% versus 2.5%; source study: Snyder PJ, et al. NEJM. 2024;390:203–211.

27. Bhasin S, et al. Depressive syndromes in men with hypogonadism in the TRAVERSE trial: response to testosterone-replacement therapy. JCEM. 2024. Primary study abstract; low-grade persistent depressive disorder subgroup and broader symptom analysis.

28. Pencina KM, et al. Effect of testosterone replacement therapy on sexual function and hypogonadal symptoms. JCEM. 2024;109:569–580. TRAVERSE sexual-function substudy; desire and activity versus erectile function.

29. Ory J, et al. Secondary polycythemia in men receiving testosterone therapy increases risk of major adverse cardiovascular events and venous thromboembolism in the first year. J Urol. 2022;207:1295–1301. Observational study; ≥52% definition, matched groups and combined MACE/VTE outcome.

30. Pastuszak AW, et al. Comparison of the effects of testosterone gels, injections, and pellets. Sex Med. 2015;3:165–173. Retrospective formulation comparison; >50% hematocrit threshold and baseline group differences.

31. Handelsman DJ, et al. Recovery of male reproductive function after ceasing prolonged testosterone undecanoate injections. Eur J Endocrinol. 2022;186:307–318. Author-institution abstract; 303 men from testosterone/placebo groups, hormone recovery—not semen recovery.

32. WHO Task Force. Contraceptive efficacy of testosterone-induced azoospermia and oligozoospermia in normal men. Fertil Steril. 1996;65:821–829. Primary contraceptive trial; variable suppression, pregnancies with remaining sperm, and post-treatment recovery.

33. Hone Health. Testosterone replacement therapy and testosterone product disclosures. Also checked: testosterone product information. Public product/pricing statements; compare with the newer help-center disclosures in sources 44–49.

34. Male Excel. Public pricing, TRT program and terms. Also checked: TRT program and terms and conditions. Starting package includes thyroid; shipping and applicable terms matter.

35. Taurus Meds. Testosterone offer and legal terms. Also checked: terms and homepage. Product, membership-fee and refund wording conflicts are not resolved by assumption.

36. Vogelxo prescribing information. Revised April 2020 in the record checked. Record updated July 2025; printed prescribing information remains older. Secondary-exposure boxed warning.

37. Hikma testosterone enanthate prescribing information. Revised June 2025. Record updated May 2026; warnings, reported androgen adverse effects and Schedule III status.

38. CDC. About venous thromboembolism (blood clots). DVT symptoms require prompt care; pulmonary embolism requires immediate medical attention.

39. NIDDK. Symptoms and causes of urinary retention. Acute inability to urinate requires immediate care.

40. NHS. Priapism (painful erections). Emergency assessment for a persistent erection; do not wait beyond four hours.

41. 988 Suicide & Crisis Lifeline. U.S. crisis support by call or text; emergency care for immediate physical danger.

42. FDA. Questions and answers on HCG products for weight loss. Sections 2 and 5 describe approved prescription hCG uses, including selected hormonal treatment in males; not approval for routine TRT add-on use.

43. Clomid (clomiphene citrate) prescribing information. Indications and usage: ovulatory dysfunction in women desiring pregnancy; male use is off-label and separately discussed in society guidance, source 22.

44. Hone Health. Premium membership: full clinical insight for men. Updated September 29, 2026. Initial $65, confirmatory $25, membership $155/month, medication separate and testosterone cypionate price per vial.

45. Hone Health. Men’s lab schedule on the Premium plan. Updated September 9, 2026. Follow-up months 3, 6, 9, 12, 18 and 24; core and additional panels.

46. Hone Health. Men’s Premium biomarkers. CBC including hematocrit, PSA and hormone measurements.

47. Hone Health. Order cancellation and refund policy. Updated August 31, 2026. Separate membership and prescription cancellation; timing and refund exceptions.

48. Hone Health. Service availability by state. Updated September 4, 2026. State coverage differs between Basic, Plus and Premium.

49. Hone Health. Membership overview and confirmatory-testing explanation. Basic does not include hormone therapy; Plus is $135/month. Retesting explanation conflicts with plan-specific confirmatory pricing.

50. Electronic Code of Federal Regulations. 21 CFR §1308.13, Schedule III. Anabolic steroids, including testosterone, are Schedule III controlled substances.

51. Mayo Clinic. Testosterone therapy: potential benefits and risks as you age. Clinical patient guidance used here only for the stated possibility of reduced testicular size, not for current regulatory or cardiovascular conclusions.

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What is the bottom line?

TRT side effects are real, and monitoring can catch some before they cause symptoms. Blood counts, blood-pressure checks and fertility testing answer different questions; none guarantees that every serious problem will be prevented. The practical next step is to know who reviews your results, what happens when something is abnormal and how fertility changes the plan.

You do not need to become an expert in every label. You do need a clinician who can explain the monitoring plan and respond when you need care.

Still not sure which TRT care route fits you? Use our free Find My TRT Path tool.

Find My TRT Path →

This page is educational information, not medical advice. Call 911 for chest pain, sudden trouble breathing, stroke signs, collapse or a severe allergic reaction. A possible leg clot needs urgent same-day assessment; do not wait for a routine clinic message.