Low testosterone after a steroid cycle: what to do and when to see a doctor

After a cycle of anabolic steroids, your own testosterone usually returns to normal levels within a few months, but not in every man, and not at the same pace as fertility. In the HAARLEM study, which followed 100 amateur athletes for a year, testosterone had normalised in most of them three months after finishing, whereas sperm production took around a year. The sensible thing in the meantime is not to restart or improvise a post-cycle therapy, to have properly timed blood tests and to see a doctor if symptoms last beyond six months, if you want to have children or if your mood collapses.

Why testosterone drops when you finish the cycle

The body regulates its testosterone like a thermostat: the hypothalamus and the pituitary release LH and FSH, and those two hormones tell the testicle to make testosterone and sperm. When androgens arrive from outside, the thermostat detects an excess and switches the signal off. That is why the European Association of Urology guideline (EAU, 2026) classifies testosterone and anabolic steroids as a drug-induced cause of secondary hypogonadism, the kind that starts in the brain rather than in the testicle.

While the cycle lasts you do not notice it, because the missing hormone comes from whatever you inject or swallow. The problem appears when you stop: the external supply disappears within days or weeks, and your own axis needs considerably longer to start up again. That gap is low testosterone after a cycle. If you want a refresher on how hypogonadism shows itself in general, we cover it in low testosterone: real symptoms and when to worry.

How long the hormonal axis takes to recover

The cleanest data come from the HAARLEM study (Human Reproduction, 2021), which followed 100 men from before they started a cycle until a year later. During use, 77% had a total sperm count below 40 million. Three months after finishing, total and free testosterone no longer differed from baseline across the group, but the sperm count was still clearly lower.

At the end of the year, 9 men (11%) still had testosterone below normal and 34% still had a count under 40 million. In other words: most men recover, but not all, and fertility lags behind the hormone.

An Australian study of current and former users (Journal of Clinical Endocrinology & Metabolism, 2020) reached a similar conclusion with somewhat longer timescales: suppressed testicular function recovered in practice between 6 and 18 months after stopping, with an average of 10.7 months for LH and 14.1 months for sperm output. The testicles did, however, tend to stay slightly smaller. And the only factor associated with slower sperm recovery was how long the steroids had been used.

At the other end is the long tail. In a Danish study (PLoS One, 2016), 27.2% of former users, who had been off steroids for around two and a half years on average, had total testosterone below the reference limit of 12.1 nmol/L, compared with none of the controls. In 2025 a Dutch group proposed the term prolonged hypogonadism after androgen abuse when it persists six months after stopping, and makes clear that other causes must be ruled out first.

Which symptoms are expected and which deserve attention

The symptoms of that window are those of any low testosterone, but concentrated and often abrupt. In the Danish study, among former users:

• 40.1% reported reduced sexual desire.
• 27.3% had erectile dysfunction.
• 24.2% had depressive symptoms.
• And in a US study (Addiction, 2015), former users had smaller testicles, lower testosterone and less sexual desire than weightlifters who had never used anabolic steroids.

Mood deserves a paragraph of its own. In that Addiction study, 7 of 24 former users (29%) had had a major depressive episode during withdrawal, and four of them had never had one at any other time. It is not a lack of willpower: it is a known effect of withdrawing the hormone. If thoughts of harming yourself appear, this is not something to wait out: in Spain the 024 suicide prevention line is free, confidential and available 24 hours a day, and in an emergency there is 112.

What to do, and what not to do, in the first months

The most common mistake is treating the slump with another cycle or a bridge. It brings relief for a few weeks, but it switches the axis off again and adds exposure, which is exactly what the Australian study linked to slower sperm recovery. In addition, a review published in Addiction in 2009 estimated that around 30% of anabolic steroid users develop a dependence syndrome, and the discomfort of withdrawal is part of what feeds it.

The second mistake is a home-made post-cycle therapy. The medicines that usually circulate under that name exist in Spain, but none is authorised for this: according to their summaries of product characteristics in CIMA, clomifene (Omifin) is only indicated for female infertility, tamoxifen is indicated for breast cancer, and the two registered chorionic gonadotrophin products (Ovitrelle and Gonasi) are authorised to induce ovulation in women. Using them in a man is off-label use, decided and monitored by a specialist. We explain how these molecules work in enclomifene and clomifene: raising testosterone without harming fertility, and why buying them online is a bad idea in testosterone without a prescription and online sales websites.

What does make sense is giving the axis time while keeping track: note when you finished and what you used, watch how libido, erections, energy and mood evolve, and review whatever else adds to the slump, because the EAU asks for diseases, medicines and substances that interfere with testosterone to be ruled out before labelling someone as hypogonadal. Stopping also pays off in its own right: in a Danish cohort (Journal of Internal Medicine, 2019), mortality among men who had tested positive for anabolic steroids in gyms was three times that of their controls.

Which tests are ordered and when they make sense

The diagnosis is not made from symptoms or from a single test. The Endocrine Society (2018) recommends diagnosing hypogonadism only when there are compatible symptoms and unequivocally, consistently low testosterone, measured in the morning while fasting. The EAU specifies the time, between 07:00 and 10:00, and asks for the measurement to be repeated at least twice when it comes back below 12 nmol/L.

After a cycle, the blood test also includes LH and FSH, which show whether the brain has started sending the signal again. The Australian study puts forward LH, FSH and anti-Müllerian hormone as useful, and underused, markers for tracking recovery. If you want to have children, the test that counts is a semen analysis, because sperm is what takes longest to come back.

A practical detail: tell your doctor what you used, for how long and when you stopped. A blood test taken while traces of a long-acting compound remain, or with use that has not been disclosed, can look like hypogonadism when it is not; the Dutch group itself lists undisclosed use among the explanations for cases that do not recover.

When to see a doctor without waiting any longer

• If the symptoms or the low testosterone are still there six months after finishing, the timeframe proposed for speaking of prolonged hypogonadism.
• If you want to have children now or soon: sperm recovery is the slowest and there are specific medical options.
• If your mood collapses, even in the first few weeks.
• If you have stacked many cycles or have been using for years, because cumulative exposure is associated with slower recovery.

What is considered if the axis does not recover

It is worth being honest here: there is no agreed protocol. In a survey of 101 clinicians published in 2023, 84% advised waiting for symptoms to resolve without any other treatment, 59% had patients who still had symptoms, and the authors point out that there are no guidelines or recommended therapies specifically for this condition. The Endocrine Society's 2014 scientific statement was already calling for trials to treat the withdrawal syndrome.

When fertility is the goal, the EAU considers gonadotrophins the standard treatment in secondary hypogonadism in men who wish to become fathers. In Spain, the summary of product characteristics of GONAL-f includes, in adult men, stimulating spermatogenesis in hypogonadotropic hypogonadism, together with chorionic gonadotrophin. The same guideline mentions selective oestrogen receptor modulators as an off-label option in functional secondary hypogonadism.

If children are not being sought and the hypogonadism persists and is confirmed, testosterone therapy is assessed using the same criteria as for any other man: in Spain it is a prescription-only medicine, and the Endocrine Society advises against starting it if you plan to have children in the near term. What it involves, how it is given and what monitoring it requires is explained in testosterone replacement therapy (TRT): what it is and what to expect.

What to take away

After a cycle, what you can expect is a slump that recovers over months, with fertility lagging behind; what is not normal is for it to last more than half a year, to stop you having children or to drag your mood down, and in none of those cases is the answer another cycle or a post-cycle therapy bought online. What does exist in Spain today is men's hormonal health treatment with a prior assessment, a prescription when appropriate from a registered doctor and ongoing follow-up, and that is how we do it at AiON. You can check in a few minutes whether you are eligible.