Does TRT Raise Blood Pressure? What the Evidence Shows

Testosterone replacement therapy (TRT) can raise your blood pressure. Not by a lot for most men, but enough that the FDA now requires a blood pressure warning on every testosterone product sold in the United States. The good news: the increase is small, it's predictable, and it's manageable if you know what to watch for.

This guide breaks down exactly how much TRT raises blood pressure, why it happens, who's most at risk, and what you and your provider can do about it. Every number here comes from a clinical trial, an FDA label, or a published guideline.

Quick Answer

• Yes, TRT can raise blood pressure, but the average bump is small. Ambulatory studies show systolic blood pressure rising roughly 4 to 5 mmHg on testosterone, with diastolic rising about 2 to 3 mmHg (White, 2021).
• The FDA added a class-wide blood pressure warning to all testosterone products in February 2025, telling patients to monitor their blood pressure regularly while on therapy (FDA, 2025).
• The biggest driver is a rising red blood cell count (hematocrit). Men with the largest hematocrit jumps saw systolic blood pressure climb about 8 mmHg, far more than men with stable blood counts (White, 2021).
• It's manageable. Lower doses, controlling hematocrit, weight loss, cutting salt, and standard blood pressure medication all help. The large TRAVERSE heart-safety trial found testosterone did not increase major cardiac events versus placebo (Lincoff, 2023).

Medical disclaimer: This article is for education only. It is not medical advice and does not replace a conversation with your doctor. Testosterone is a prescription medication. Do not start, stop, or change your dose without talking to a licensed clinician. If you have very high blood pressure or symptoms like chest pain, severe headache, or vision changes, seek medical care right away.

Does TRT Raise Blood Pressure?

Yes. The honest answer is that testosterone nudges blood pressure up in most men, but the size of that nudge is modest for the average patient.

For years this question was murky. Some studies showed no effect. A few even suggested testosterone might lower blood pressure in certain men. The confusion came from how blood pressure was measured. A single reading in a clinic misses a lot. It can't catch small, steady changes spread across 24 hours.

That changed when the FDA required drugmakers to run ambulatory blood pressure monitoring (ABPM) studies. Instead of one office reading, ABPM straps a cuff on you and takes readings every 20 to 30 minutes, day and night, for a full day. It's the gold standard for catching real shifts in blood pressure.

When researchers used ABPM, a clear pattern showed up. Testosterone raises blood pressure. The effect is small, but it's real and it's consistent across products.

Here's the catch worth understanding. The big outcome trials, the ones that count actual heart attacks and strokes, mostly found no meaningful difference in blood pressure between testosterone and placebo. A 2022 meta-analysis of individual patient data from dozens of trials found cardiovascular events happened at nearly identical rates on testosterone (7.5%) and placebo (7.2%) (Hudson, 2022). So the blood pressure rise is real but small enough that it didn't translate into more heart events in those studies.

Both things are true at once. TRT raises blood pressure a few points. And for most men, that few points doesn't cause a heart attack. The job is to keep that small rise from becoming a big one.

How Much Does Testosterone Raise Blood Pressure?

The clearest data comes from ABPM studies on oral testosterone undecanoate. In a study of 138 hypogonadal men, four months of treatment produced these changes (White, 2021):

Notice the pattern. Systolic pressure (the top number) moves more than diastolic. And the daytime increase is the largest. None of these is a dramatic spike. A 4 to 5 mmHg rise is the kind of change that pushes a man with borderline blood pressure over a treatment threshold, but won't budge a man with healthy numbers into danger.

The FDA-approved label for oral testosterone undecanoate (Jatenzo) reports similar findings: an average systolic/diastolic rise of about 4.9/2.5 mmHg after four months. In men already taking blood pressure medication, the rise was a bit larger, around 5.4/3.2 mmHg.

Here's the number that matters most. The increase was not uniform. It tracked closely with how much a man's red blood cell count rose. Men in the top quartile for hematocrit change (their blood count climbed 6% to 14%) saw their systolic blood pressure jump an average of 8.3 mmHg. Men in the bottom three quartiles saw much smaller rises of 1.9 to 3.3 mmHg (White, 2021).

That single finding is the key to managing TRT and blood pressure. Control the red blood cells, and you control most of the blood pressure risk.

Why Does Testosterone Raise Blood Pressure?

Three mechanisms drive most of the effect. Understanding them tells you exactly what to monitor.

1. Higher red blood cell count (erythrocytosis)

This is the big one. Testosterone tells your bone marrow to make more red blood cells. That's partly why it helps energy and stamina. But more red cells mean thicker blood. Thicker blood is harder to push through your vessels, so your heart works against more resistance, and pressure rises.

Doctors track this with hematocrit, the percentage of your blood made up of red cells. As shown above, the men with the biggest hematocrit jumps had by far the biggest blood pressure rises. Injectable testosterone tends to raise hematocrit more than gels or patches, which is one reason your delivery method matters. We cover this in depth in our guide on high hematocrit on TRT and how to lower it.

2. Sodium and water retention

Testosterone causes the kidneys to hold onto a little extra sodium and water. Sodium pulls water with it, so even a small change increases the total volume of fluid in your bloodstream. More fluid in the same set of pipes means more pressure. This effect tends to show up early in treatment and is usually mild. It's also dose-dependent. Higher doses retain more fluid.

3. Effects on blood vessels and the nervous system

Testosterone has direct effects on the lining of blood vessels and on the sympathetic nervous system (your fight-or-flight signaling). These effects are more complex and less consistent than the first two. In some men testosterone may actually relax vessels; in others it may stiffen the response. This is why a small number of men see no blood pressure change at all, and a rare few even see a slight drop.

Which Testosterone Products Raise Blood Pressure the Most?

The FDA's 2025 review concluded that the blood pressure effect is class-wide. Every formulation can raise it. That's why the warning went on all of them (FDA, 2025).

That said, the magnitude isn't identical across delivery methods, mostly because they affect hematocrit differently.

Because injectable testosterone produces the highest peak levels and the biggest hematocrit swings, men who run into blood pressure or red-cell problems on injections are often switched to a transdermal gel or to smaller, more frequent subcutaneous shots. If you're weighing your options, our breakdown of TRT delivery methods walks through the trade-offs, and our guide on subcutaneous vs intramuscular injections covers why injection style affects your blood count.

What Did the FDA Say About TRT and Blood Pressure?

In February 2025, the FDA made two big changes to testosterone labeling at once (FDA, 2025).

It added a blood pressure warning to every testosterone product. The new warning tells patients that testosterone can increase blood pressure, that this can raise cardiovascular risk over time, and that they should have their blood pressure checked regularly. Products that didn't already carry a blood pressure warning were required to add one.

It removed the older cardiovascular boxed warning. For years testosterone carried language warning about a possible increase in heart attacks and strokes. The FDA removed that boxed warning because newer evidence, especially the TRAVERSE trial, did not support it.

These two moves came from two different bodies of evidence:

• The mandated ABPM studies showed all testosterone products raise blood pressure modestly. Hence the new blood pressure warning.
• TRAVERSE showed testosterone did not increase major cardiac events versus placebo. Hence removing the broader cardiovascular boxed warning.

So the FDA's stance is nuanced. Testosterone is safer for the heart than the old boxed warning implied, but it does raise blood pressure, and that needs watching. You can think of it as the FDA trading a scary, vague warning for a specific, actionable one.

What Did the TRAVERSE Trial Show?

TRAVERSE is the most important testosterone safety study ever run. It randomized 5,246 men aged 45 to 80 who had low testosterone plus existing heart disease or a high risk of it. Half got testosterone gel, half got placebo gel, and researchers followed them for an average of about 22 months (Lincoff, 2023).

The headline result: testosterone was noninferior to placebo for major adverse cardiac events (heart attack, stroke, or cardiovascular death). The rates were 7.0% on testosterone and 7.3% on placebo. In plain terms, men on testosterone did not have more heart attacks or strokes.

But TRAVERSE wasn't all reassuring. The testosterone group had higher rates of a few specific problems:

This is why "TRT doesn't hurt your heart" is an oversimplification. The big cardiac endpoints were reassuring, but the clotting and arrhythmia signals are real and worth a conversation with your doctor, especially if you already have heart issues. We dig into the full picture in our guide on TRT and heart health and what the TRAVERSE trial says.

Who Is Most at Risk for High Blood Pressure on TRT?

Not everyone reacts the same. Some men sail through TRT with rock-steady blood pressure. Others need close watching. You're in the higher-risk group if you have one or more of these:

• You already have hypertension. Starting blood pressure matters. A 5 mmHg rise on top of 150/95 is a bigger deal than the same rise on top of 118/76.
• Your hematocrit climbs fast. Men whose red-cell count jumps are the ones whose pressure jumps. This is the single strongest predictor.
• You use injectable testosterone at higher doses. Bigger doses mean more hematocrit rise and more fluid retention.
• You're overweight or have sleep apnea. Both raise baseline blood pressure, and untreated sleep apnea worsens with testosterone in some men. See our guide on TRT and sleep apnea.
• You have kidney disease or heart failure. These make fluid retention more dangerous.
• You eat a high-salt diet or drink heavily. Both push blood pressure up on their own.

If two or more of these apply to you, your provider should check your blood pressure and hematocrit more often, especially in the first six months.

How Do You Manage Blood Pressure on TRT?

Here's the part that matters most. A small, manageable rise in blood pressure is not a reason to avoid TRT if you genuinely need it. It's a reason to monitor and adjust. Here's how that's done.

Monitor before and during treatment

The Endocrine Society's clinical practice guideline recommends measuring hematocrit at baseline, again at 3 to 6 months, and then annually (Bhasin, 2018). Blood pressure should be checked at every visit, and ideally at home too. A cheap home cuff is one of the best investments you can make on TRT. Our TRT blood work and monitoring schedule lays out exactly which labs to run and when.

Keep hematocrit in check

Since hematocrit is the main driver, controlling it controls most of the blood pressure risk. The AUA Testosterone Deficiency Guideline advises action when hematocrit climbs too high (AUA Guideline):

Therapeutic phlebotomy (donating or removing a unit of blood) lowers hematocrit, but it's not a magic fix. Studies show regular donation alone often fails to keep levels down. Lowering the dose or switching to a gel usually works better long term. Our guide on high hematocrit on TRT covers each option.

Use the lowest effective dose

More testosterone means more hematocrit rise and more fluid retention. Many men feel great at modest doses that keep their levels solidly in the normal range without pushing blood pressure up. If your blood pressure climbs, the first lever your provider should pull is often the dose itself. See our TRT dosage guide for typical ranges.

Switch delivery methods if needed

If injections are spiking your hematocrit, a transdermal gel or smaller, more frequent subcutaneous shots can smooth things out. Steadier testosterone levels usually mean steadier blood counts.

Lifestyle moves that lower blood pressure

These work whether or not you're on TRT, and they directly offset the mechanisms above:

• Cut sodium. Less salt means less fluid retention. Aim under 2,300 mg a day.
• Lose weight if you carry extra. Weight loss is one of the most reliable ways to drop blood pressure, and it raises natural testosterone too.
• Limit alcohol. Heavy drinking raises blood pressure. More on that in our guide on TRT and alcohol.
• Move daily. Regular aerobic exercise can lower systolic pressure by several points.
• Stay hydrated and don't over-supplement creatine or stimulants, which can stack with TRT's fluid effects.

Use blood pressure medication when needed

If lifestyle and dose adjustments aren't enough, standard blood pressure drugs work fine alongside TRT. There's no special interaction that rules them out. A man can absolutely take testosterone and a blood pressure pill at the same time. The goal is to keep numbers in a healthy range, not to choose one therapy over the other.

Should You Stop TRT if Your Blood Pressure Rises?

Usually not, at least not as a first move. A modest rise in blood pressure is a signal to adjust, not necessarily to quit. The typical order of operations a good provider follows:

1. Confirm the rise with repeated readings, ideally at home, not one bad office number.
2. Check hematocrit. If it's high, that's the likely culprit and the target.
3. Lower the dose or change delivery method.
4. Add or optimize lifestyle measures.
5. Add blood pressure medication if needed.
6. Only consider stopping TRT if blood pressure stays dangerously high despite all of the above, or if it's part of a bigger safety picture.

Stopping TRT abruptly has its own downsides, including a crash in testosterone and the return of low-T symptoms. If you and your provider do decide to come off, do it deliberately. Our guide on how to stop TRT safely covers the process.

The bottom line is that blood pressure is a manageable side effect, not a dead end. The right provider treats it as a number to optimize, the same way they manage your testosterone level, hematocrit, and estrogen. If you're shopping for that kind of provider, our pages on how to choose a TRT provider and our provider directory can help.

Frequently Asked Questions

How much does TRT raise blood pressure? On average, ambulatory studies show systolic blood pressure rising about 4 to 5 mmHg and diastolic about 2 to 3 mmHg (White, 2021). But the rise isn't uniform. Men whose red blood cell count climbs the most can see systolic pressure jump 8 mmHg or more, while men with stable blood counts may see almost no change.

Does testosterone cause permanent high blood pressure? Not usually. The rise is driven by reversible factors like a higher red-cell count and fluid retention. Lowering the dose, controlling hematocrit, or switching delivery methods typically brings blood pressure back down. It's a manageable, adjustable side effect rather than a permanent change.

Is TRT safe if I already have high blood pressure? It can be, but it requires closer monitoring. If your blood pressure is well controlled on medication, many providers will still prescribe TRT while watching your numbers carefully. If your blood pressure is uncontrolled, most guidelines suggest getting it under control first. This is a decision to make with your doctor, not on your own.

Which TRT method is least likely to raise blood pressure? Transdermal gels and creams tend to raise hematocrit less than injections, so they often produce smaller blood pressure changes. Smaller, more frequent subcutaneous injections also help by avoiding the high peaks of large weekly intramuscular doses. The FDA notes the blood pressure effect exists across all products, so monitoring matters regardless of method.

Did the FDA say TRT is dangerous for the heart? The opposite, mostly. In 2025 the FDA removed the older boxed warning about heart attack and stroke risk because the large TRAVERSE trial found no increase in major cardiac events (Lincoff, 2023). At the same time it added a specific blood pressure warning, since testosterone does raise blood pressure modestly. The message is to monitor blood pressure, not to fear the therapy.

Related Guides

• TRT and Heart Health: What the TRAVERSE Trial Says
• High Hematocrit on TRT: Why It Happens and How to Lower It
• TRT Blood Work: The Labs and Monitoring Schedule
• TRT Side Effects and Safety: What the Evidence Says
• TRT Delivery Methods: Injections vs Cream vs Pellets vs Nasal

Plan and compare your options: Browse vetted clinics in our provider directory, compare TRT options side by side, and estimate your monthly spend with our TRT cost calculator.

Sources

1. White WB, et al. Effects of a Novel Oral Testosterone Undecanoate on Ambulatory Blood Pressure in Hypogonadal Men. Journal of Cardiovascular Pharmacology and Therapeutics, 2021. PMID 34191621
2. Lincoff AM, Bhasin S, et al. Cardiovascular Safety of Testosterone-Replacement Therapy (TRAVERSE). New England Journal of Medicine, 2023. PMID 37326322
3. Hudson J, Cruickshank M, et al. Adverse cardiovascular events and mortality in men during testosterone treatment: an individual patient and aggregate data meta-analysis. Lancet Healthy Longevity, 2022. PMID 35711614
4. Bhasin S, et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism, 2018. PMID 29562364
5. U.S. Food and Drug Administration. FDA issues class-wide labeling changes for testosterone products. February 2025. FDA Drug Safety Communication
6. American Urological Association. Evaluation and Management of Testosterone Deficiency: AUA Guideline. AUA Guideline
7. JATENZO (testosterone undecanoate) Prescribing Information, FDA. DailyMed Label
8. Endocrine Society. Testosterone Therapy for Hypogonadism Guideline Resources. Endocrine Society

Last reviewed June 2026. This guide reflects FDA labeling and clinical guidelines current as of that date. Guidelines change; confirm current recommendations with your provider.