Your own production shuts off during use and restarts after, usually within months. Post-cycle therapy uses SERMs to restart the pituitary signal and sometimes hCG to wake the testes; a physician decides from bloodwork, not a fixed protocol. Keep training and protein high through the low-hormone window: that is where gains are kept or lost.
- LH and FSH fall to near zero during use in everyone; they are the first markers to return after stopping.
- Most men recover within a few months; a minority stay suppressed beyond a year (anabolic steroid-induced hypogonadism), which is treatable.
- SERMs (clomiphene, tamoxifen) restart the signal from the brain; hCG stimulates the testes directly and does not restart the brain signal by itself.
- There are no randomised trials of PCT in athletes; the rationale comes from treating clinical hypogonadism.
- The main lever for keeping gains through recovery is training hard and eating enough protein, not any medicine.
What switches off
Your testosterone is run by a feedback loop, the HPG axis: hypothalamus → pituitary (LH, FSH) → testes. External androgens tell the brain there is plenty, so LH and FSH drop to near zero and the testes stop. Every compound, every effective dose. No exceptions.
Recovery timeline
| Stage | Typical timing | Marker |
|---|---|---|
| Compound clears | days to weeks, ester-dependent | none |
| Pituitary restarts | weeks | LH, FSH rising |
| Testes respond | 1–3 months | testosterone rising |
| Back to your baseline | 2–4 months for most | testosterone at pre-use value, twice |
| Not back | beyond that | anabolic steroid-induced hypogonadism: treat |
The HAARLEM cohort largely recovered within a year. The 2023 scoping review documents wide variation and cases persisting well beyond that. You will not know which group you are in without blood tests.
What PCT medicines do
- SERMs (clomiphene, tamoxifen): block estrogen feedback in the brain, so LH and FSH rise. Restart from the top. Licensed for other conditions; used here off-label based on the hypogonadism literature.
- hCG: looks like LH to the testes and stimulates them directly. Keeps or restores testicular function; does not restart the brain signal on its own, and used long it suppresses it further.
- Aromatase inhibitors: not a restart tool. Lowering estrogen hard costs bone, lipids and mood.
Honest status of the evidence: no randomised trials of PCT in athletes. Rationale borrowed from clinical hypogonadism, where these medicines demonstrably raise LH, FSH and testosterone. Any specific protocol you read online is consensus, not data.
When a physician uses them
From the first post-use blood test. Suppressed LH/FSH with low testosterone and symptoms, several weeks after clearance, is the picture that prompts treatment. Timing depends on which compounds and how long they take to clear. Contraindications and side effects exist. That is why this is a prescription decision and why this site does not publish a schedule.
Keeping what you built
The low-hormone window is where gains are lost, and the loss is mostly behavioural:
- Train hard. Mechanical tension is the signal to keep muscle. Volume can drop; intensity should not.
- Protein 1.6–2.2 g per kg of body weight, spread over the day.
- Do not diet. A calorie deficit on top of low testosterone doubles the muscle loss.
- Sleep. Recovery of the axis and of mood both run on it.
- Expect low mood for a few weeks; if it persists, it is a hormone number to check and a doctor to see, not a character test.
Some size drops with water and glycogen. Strength largely stays if you keep lifting. Added muscle nuclei stay regardless, which is why regaining later is faster than the first time.
Frequently asked questions
Do I need PCT?
Depends on bloodwork. Short exposure often recovers alone; long or heavy exposure is more likely to need help. Test 4–6 weeks after clearance and let a physician decide from LH, FSH and testosterone.
How long until testosterone recovers?
LH and FSH within weeks, testosterone within a few months for most. Studies document cases beyond a year. Wide range, not predictable per person.
What do PCT medicines do?
SERMs block estrogen feedback in the brain so LH and FSH rise. hCG mimics LH and stimulates the testes. Both are prescription medicines, used off-label, chosen and timed by a physician.
How do I keep my gains coming off?
Keep intensity in the gym, keep protein at 1.6–2.2 g per kg, sleep, and do not cut calories hard during the window. Some size loss is normal; strength largely stays if you keep lifting.
Does this apply to women?
The axis is the same but the evidence is absent; the usual marker is cycle returning. Work with a gynaecologist or endocrinologist, not men's protocols.
Sources
- Rahnema CD et al. Anabolic steroid-induced hypogonadism: diagnosis and treatment. Fertility and Sterility, 2014.
- Physical, psychological and biochemical recovery from anabolic steroid-induced hypogonadism: a scoping review. Endocrine Connections, 2023.
- Smit DL et al. Health effects of androgen abuse: a review of the HAARLEM study. 2022.