Post Cycle Therapy (PCT): The Complete Guide
Post Cycle Therapy (PCT) is the protocol used after a steroid cycle to restart the body's natural testosterone production, preserve muscle gains, and restore hormonal balance. Skipping PCT is one of the most common — and most damaging — mistakes in steroid use.
Why Is PCT Necessary?
When you introduce exogenous androgens (steroids), your hypothalamic-pituitary-gonadal (HPG) axis detects elevated testosterone levels and suppresses its own output. The longer and heavier the cycle, the more suppressed natural production becomes. Without PCT:
- Testosterone levels crash after the cycle ends
- Estrogen can become dominant (gynecomastia, fat gain, low libido)
- Cortisol rises unchecked, causing rapid muscle loss
- Recovery to natural levels can take 6-12+ months unaided
When to Start PCT
The timing depends on the half-life of the steroids used in your cycle:
| Steroid Type | Examples | Start PCT After Last Injection |
|---|---|---|
| Short esters | Testosterone Propionate, Tren Ace | 3 days |
| Long esters | Testosterone Enanthate, Deca | 14-18 days |
| Oral only | Dianabol, Anavar | 24-48 hours after last dose |
The Three PCT Drugs
Clomid (Clomiphene Citrate)
Clomid is a selective estrogen receptor modulator (SERM) that works at the pituitary level — it blocks estrogen feedback, causing the pituitary to release more LH and FSH, which directly stimulates testicular testosterone production. It is the most powerful PCT drug for restarting the HPG axis.
- Standard protocol: 50mg/day for 2 weeks, then 25mg/day for 2 weeks
- After heavy cycle: 100/100/50/50mg
- Side effects: Visual disturbances (rare), mood swings, headaches
Nolvadex (Tamoxifen Citrate)
Nolvadex is also a SERM but works differently to Clomid — it is particularly effective at blocking estrogen at the breast tissue, making it the primary defence against gynecomastia. It also stimulates LH release, though slightly less potently than Clomid. Nolvadex and Clomid are often run together.
- Standard protocol: 40mg/day for 2 weeks, then 20mg/day for 2 weeks
- Gyno prevention: 20mg/day throughout cycle if needed
- Side effects: Generally mild — hot flushes, nausea in some users
HCG (Human Chorionic Gonadotropin)
HCG mimics LH and directly stimulates the testes to produce testosterone. It is used during long cycles (to prevent testicular atrophy) or in the 2 weeks before PCT begins. HCG should not be run throughout PCT as it can suppress natural LH production.
- Mid-cycle use: 500IU twice weekly throughout cycle
- Pre-PCT blast: 1000IU EOD for 10 days, then start Clomid/Nolvadex
- Side effects: Estrogenic (aromatizes), water retention at high doses
PCT Protocol Examples
Light Cycle PCT (oral-only or low-dose testosterone)
Weeks 1-4: Nolvadex 40/40/20/20mg/day
Standard Cycle PCT (testosterone base, 10-16 weeks)
Heavy Cycle PCT (Deca, high doses, 16+ weeks)
2 weeks pre-PCT: HCG 1000IU EOD
Weeks 1-6: Clomid 100/100/50/50/25/25mg + Nolvadex 40/40/20/20/20/20mg
Signs That PCT Is Working
- Libido returning to baseline or above (usually weeks 2-3)
- Morning erections resuming
- Energy and mood stabilising
- Testosterone levels recovering on blood work (target: within normal range by week 6-8)
