Testosterone cream is generally safe when prescribed by a doctor and used at the correct dose, but it does carry real risks that require ongoing blood work and careful handling. A 2024 meta-analysis of over 9,000 men published in the Journal of the American College of Cardiology found no significant increase in major cardiovascular events compared to placebo, putting to rest one of the biggest safety fears. That said, the cream isn’t risk-free, and how safely it works depends on proper monitoring, application habits, and whether you’re using an FDA-approved product.
Common Side Effects
The most frequent side effects of testosterone cream are mild and skin-related: acne, redness or irritation at the application site, itchy or dry skin, and oily skin. Some people also report headaches, nausea, or decreased sexual desire, particularly early in treatment. These effects often settle down as your body adjusts, but persistent irritation at the application site may mean you need to rotate where you apply it or switch formulations.
The Heart Risk Question
For years, headlines warned that testosterone therapy could trigger heart attacks and strokes. The evidence now tells a more reassuring story. In the 2024 meta-analysis, major cardiovascular events occurred in 6.6% of men on testosterone and 6.8% of men on placebo, a difference that was not statistically meaningful. The researchers concluded that testosterone replacement was not associated with cardiovascular risk in men with low testosterone or those already at higher risk for heart disease.
That said, the analysis did find a slightly increased risk of fluid retention (edema), which can show up as swelling in the ankles, feet, or hands. For people with heart failure or kidney problems, that fluid shift matters and needs monitoring.
Blood Thickening Is the Risk to Watch
The most clinically important safety concern with testosterone cream is something called secondary polycythemia, where your body produces too many red blood cells in response to the hormone. Thicker blood raises the risk of blood clots, stroke, and other serious cardiovascular events, particularly in the first year of therapy.
This is why doctors check your hematocrit, a measure of red blood cell concentration, before starting treatment and every 6 to 12 months afterward. The American Urological Association recommends keeping hematocrit below 54%. If your baseline level is already above 50% before treatment begins, that’s a red flag. Different guidelines set the “stop and reassess” threshold between 50% and 55%, but the principle is the same: if your blood gets too thick, your dose needs to come down or therapy needs to pause.
Prostate Cancer Concerns
The old belief that testosterone fuels prostate cancer has not held up. According to the Mayo Clinic, current evidence does not support a link between testosterone therapy and the development of new prostate cancer. Studies of older men with low testosterone who received treatment showed no higher rates of prostate cancer compared to untreated men. Even in men who previously had prostate cancer, testosterone therapy doesn’t appear to increase the risk of recurrence.
There is a nuance, though. Testosterone can raise PSA levels, the blood marker used to screen for prostate cancer. Higher PSA leads to more biopsies, which leads to more detection of cancers that might never have caused symptoms. So the therapy doesn’t seem to cause cancer, but it may lead to finding cancers that were already there. Men over 40 starting testosterone should have a baseline PSA test, and ongoing screening should follow a shared decision-making approach with their doctor.
Transfer Risk to Children and Women
The FDA requires a boxed warning (its most serious safety label) on all testosterone gel and cream products because of the risk of accidental transfer. If a child or woman touches skin where testosterone was recently applied, they can absorb enough hormone to cause harm. In children, this can trigger premature puberty. In women, it can cause masculinizing effects like voice deepening and excess hair growth.
The FDA also requires a Risk Evaluation and Mitigation Strategy (REMS) for these products, including a Medication Guide that spells out precautions. The basics: wash your hands thoroughly after applying, cover the application site with clothing once dry, and wash the area before any skin-to-skin contact with another person. These steps sound simple, but the FDA flagged secondary exposure as a “significant safety concern” because real cases of transfer to children had been reported.
Safety for Women
Testosterone cream is increasingly prescribed off-label for women after menopause, typically to address low libido. There are currently no testosterone products specifically licensed for women in most countries, so doctors prescribe male-formulated products at much smaller doses, often one-fifth to one-tenth of the male dose.
At these lower doses, the safety profile looks favorable. NHS guidelines note that transdermal testosterone at female-appropriate doses does not increase the risk of breast cancer, cardiovascular disease, or blood clots, and does not affect liver function, kidney function, or blood pressure. Side effects at proper doses are generally limited to skin irritation, mild acne, oily skin, and occasionally increased hair growth at the application site.
The key word is “proper doses.” Masculinizing effects like facial hair growth, scalp hair thinning, voice deepening, and clitoral enlargement do not occur when testosterone stays within the normal female range. Some of those changes, particularly voice deepening, can be irreversible. That’s why women on testosterone therapy need blood levels checked at baseline, again two to three months after starting, and then annually. If levels climb above the female physiological range, the dose gets reduced.
Compounded Creams Carry Extra Uncertainty
Many testosterone creams are made by compounding pharmacies rather than manufactured as FDA-approved products. There’s an important safety distinction here. Compounded preparations are exempt from FDA review for safety, effectiveness, and quality. They don’t have to follow the same manufacturing standards as commercial products, and there are no requirements for reporting adverse events.
The practical concern is dosing consistency. A study of compounded hormone prescriptions from 13 pharmacies found that while most products were within 10% of the labeled dose, some were as much as 26% below what the label claimed. That kind of variability means you might be getting significantly more or less testosterone than intended from batch to batch. If you’re using a compounded cream, working with a reputable pharmacy and monitoring blood levels more closely is especially important.
What Monitoring Looks Like
Safe use of testosterone cream requires regular lab work, not a set-it-and-forget-it approach. The American Urological Association recommends checking total testosterone levels two to four weeks after starting treatment to make sure you’re in the right range, then every 6 to 12 months once stable. Hematocrit should be measured at baseline and on the same 6 to 12 month schedule, with closer monitoring if your levels trend upward.
Men over 40 should also have a baseline PSA measurement. If you develop breast tenderness or swelling during treatment, your doctor may check estradiol levels, since testosterone can partially convert to estrogen in the body. The monitoring schedule isn’t burdensome, typically two blood draws a year once you’re stable, but skipping it turns a manageable therapy into a gamble.
Fertility Effects
Testosterone cream can reduce sperm production, especially at higher doses. The body reads the incoming testosterone as a signal to dial back its own production, which also dials back the hormonal signals that drive sperm creation. For men who want to preserve fertility, this is a significant consideration. The effect is often reversible after stopping therapy, but not always completely, and recovery can take months. If future fertility matters to you, that conversation needs to happen before starting treatment, not after.