Post Cycle Therapy (PCT)
When you use exogenous testosterone or other anabolic steroids, your body stops producing its own. PCT is the process of helping your body restart natural production after a cycle.
Skipping PCT is one of the most common and most damaging mistakes
Many users focus on cycle planning and neglect PCT entirely. Without it, you risk prolonged hormonal suppression, loss of gains, depression, sexual dysfunction, and in some cases permanent damage to your hormonal system. PCT is not optional.
What PCT is and why it matters
During a steroid cycle, the hypothalamic-pituitary-testicular axis (HPTA) detects high levels of androgens in the body and responds by shutting down its own production of testosterone. The hypothalamus stops releasing GnRH, the pituitary stops releasing LH and FSH, and the testes stop producing testosterone and sperm.
When you stop the cycle, those exogenous hormones clear your system — but your body does not immediately start producing its own again. You are left in a state of very low testosterone, which can last weeks or months without intervention.
PCT uses medications — primarily SERMs (Selective Estrogen Receptor Modulators) — to stimulate the pituitary gland to restart LH and FSH production, which in turn signals the testes to start making testosterone again.
Common PCT protocols
The two most commonly used PCT medications are Tamoxifen (Nolvadex) and Clomiphene (Clomid). Some protocols use both, though this is debated. These are not recommendations — they are what is commonly reported in harm reduction communities.
Tamoxifen (Nolvadex) Protocol
Most commonly recommended
Start PCT approximately 2 weeks after your last injection of a long-ester compound (e.g. Test E/C), or 3 days after your last injection of a short-ester compound (e.g. Test Prop).
Clomiphene (Clomid) Protocol
Alternative option
Clomid is effective but carries a higher risk of side effects than Nolvadex, including mood swings, visual disturbances, and emotional instability. Many harm reduction communities now favour Nolvadex-only protocols.
When to start PCT
Timing depends on the compounds you used
The principle: wait for the exogenous compound to clear your system before starting SERMs. Starting too early means the SERM is competing with exogenous hormones still in your body, reducing its effectiveness.
What happens if you do not PCT
Prolonged low testosterone
Without PCT, natural testosterone recovery can take months or even years. Some users never fully recover, particularly after long or heavy cycles.
Loss of muscle gains
Low testosterone means your body cannot maintain the muscle mass gained during the cycle. Many users lose a significant portion of their gains.
Depression and mental health decline
Low testosterone is strongly associated with depression, anxiety, fatigue, and loss of motivation. This is the period of highest risk for mental health crises.
Sexual dysfunction
Low testosterone causes reduced libido, erectile dysfunction, and can cause significant relationship strain.
Fat gain
Low testosterone shifts body composition towards fat gain and muscle loss, often rapidly.
Driving further use
Feeling terrible without steroids is one of the main drivers of dependency. Many users start their next cycle early or go on 'blast and cruise' specifically because they cannot tolerate the low-testosterone period.
Signs that recovery is not going well
Watch for these after PCT
When to seek medical help
See your GP if:
- Your blood work shows testosterone below the reference range more than 8 weeks after completing PCT
- You are experiencing significant depression or suicidal thoughts at any point during recovery
- You have persistent sexual dysfunction that is affecting your quality of life
- You and your partner are trying to conceive and your sperm analysis is abnormal
- You have any symptoms that concern you — you do not need to wait
You have a right to honest medical care. Steroids for personal use are legal in the UK. Your GP is bound by confidentiality. Many GPs are not experienced with steroid users, so you may need to be direct about what you have used and what you need tested. Bring this page with you if it helps.
Blood work is essential during PCT
Get blood work done before your cycle, during PCT, and 8 weeks after PCT to confirm recovery. Without blood work, you are guessing.
Read the Blood Work Guide