A good post-cycle therapy (PCT) comes down to three things: choosing the right compounds for your specific cycle, dosing them correctly, and confirming recovery with blood work. There’s no single PCT that works for everyone, because the protocol you need depends on what you ran, how long you ran it, and how suppressed your natural hormone production became. Here’s how to put together a PCT that actually works.
Why PCT Matters
When you use anabolic steroids or SARMs, your body detects the external hormones and dials down its own production. The signal chain that runs from your brain to your testes, sometimes called the HPTA, essentially goes quiet. Once you stop the cycle, that system doesn’t snap back on its own, at least not quickly. PCT uses medications that stimulate your body to restart its own testosterone production, helping you hold onto muscle gains and avoid the crash of low testosterone: fatigue, mood swings, lost strength, and suppressed libido.
The Core PCT Compounds
Two medications form the backbone of nearly every PCT protocol. Both are selective estrogen receptor modulators (SERMs), meaning they block estrogen’s effects in certain tissues while stimulating your brain to release the hormones that tell your testes to produce testosterone again.
Clomiphene (Clomid) is the stronger option and is typically recommended after heavier cycles. A common dosage is 50 mg per day for four weeks. In clinical data, about 89% of men taking clomiphene achieved normal testosterone levels (above 300 ng/dL) after at least three months of use. Clomid is effective but can cause side effects including mood swings, irritability, and visual disturbances like blurring or floaters. These visual symptoms are dose-dependent and generally resolve after stopping the drug, but they’re worth knowing about.
Tamoxifen (Nolvadex) is the milder SERM and is often paired with Clomid or used alone after lighter cycles. A standard dose is 20 mg per day for four weeks. Tamoxifen carries its own ocular risks with prolonged use, including dry eye, retinal changes, and in rare cases with high cumulative doses, corneal thinning. Research published in The Oncologist found a clear correlation between cumulative tamoxifen dose and worsening eye health markers. For a four-week PCT, serious eye issues are unlikely, but if you notice any visual changes, stop immediately.
A widely referenced clinical protocol runs both together: 50 mg Clomid and 20 mg Nolvadex daily for four weeks. Some users taper, starting at higher doses the first two weeks and dropping for the final two, though evidence for tapering over a flat dose is mostly anecdotal.
HCG as a Bridge
Human chorionic gonadotropin (HCG) mimics the signal your brain normally sends to your testes, keeping them responsive and full-sized during or just before PCT. It doesn’t restart your natural hormone axis on its own, so it’s used alongside SERMs, not instead of them. A common approach is 250 IU per day during the PCT weeks. Some users prefer to run HCG in the final weeks of their cycle and the first week or two of PCT, then drop it while continuing SERMs alone. The key point: HCG keeps the testes primed so that when SERMs tell your brain to send signals, the testes are ready to respond.
Enclomiphene: A Newer Option
Enclomiphene is the active isomer of clomiphene, meaning it’s the specific part of the Clomid molecule that does the heavy lifting for testosterone recovery, without the other isomer that contributes to side effects. A retrospective study published in Cureus compared the two head-to-head and found that enclomiphene was more effective at raising LH and FSH (the brain hormones that drive testosterone production) and produced a more significant increase in sperm quality. Both compounds restored normal testosterone levels in roughly 87 to 89% of men, but enclomiphene achieved it at lower doses, typically 12.5 to 25 mg daily compared to 50 mg every other day for standard clomiphene.
Enclomiphene is harder to source reliably and isn’t as widely available as Clomid or Nolvadex. If you can verify a legitimate source, it’s worth considering, particularly if you’ve had mood or vision issues with Clomid in the past.
Matching PCT to Your Cycle
Not every cycle requires the same level of PCT. The length and intensity of what you ran dictates what you need afterward.
- Heavy steroid cycles (12+ weeks, multiple compounds): Full PCT with HCG, Clomid, and Nolvadex for four weeks. Start PCT after the compound has cleared your system, which depends on the ester length. For long esters like testosterone enanthate, that means waiting about two weeks after your last injection.
- Moderate steroid cycles (8 to 12 weeks, single compound): Clomid and Nolvadex together for four weeks is standard. HCG is optional but beneficial.
- SARM cycles: These vary significantly. As US Pharmacist notes, the necessity and length of PCT depends on the specific SARM and dose used. Milder SARMs at low doses may only need Nolvadex alone for two to four weeks. Stronger SARMs or stacked cycles warrant the same approach as a moderate steroid cycle. The problem with SARMs is that many products are mislabeled or contaminated, so you may not know exactly how suppressed you are without blood work.
Blood Work Is the Only Way to Know
The single most important step in finding a good PCT is getting blood work done, both before you start PCT and after you finish it. Without labs, you’re guessing. A study in the European Journal of Endocrinology defined successful recovery as having three markers all within normal range: LH (1 to 12 U/L), FSH (1 to 12 U/L), and total testosterone (roughly 290 to 1,040 ng/dL, using their reference of 10 to 36 nmol/L).
Get a baseline panel before your cycle so you know your personal normal. Then get blood drawn about two weeks before starting PCT to see how suppressed you are, and again four to six weeks after finishing PCT to confirm recovery. The key markers to request are total testosterone, free testosterone, LH, FSH, and estradiol. Estradiol matters because if estrogen rebounds too high during PCT, it can counteract recovery and cause symptoms like water retention and mood issues, even though some clinical definitions of “recovery” don’t include it.
If your levels haven’t normalized four to six weeks post-PCT, you may need a second round or further evaluation. Some men, particularly after very long or heavy cycles, take six months or longer to fully recover. The European Journal of Endocrinology research found that the duration and type of compounds used were key factors predicting whether hormones normalized.
Red Flags When Sourcing PCT
The compounds themselves are well established, but the challenge is getting legitimate products. A few practical guidelines for avoiding problems:
- Pharmaceutical-grade over research chemical companies: When possible, pharmacy-dispensed Clomid and Nolvadex are the safest bet. These are prescription medications in most countries, and some telehealth services now prescribe them for hormonal recovery.
- Third-party testing: If you’re sourcing from a research chemical company, look for vendors that provide certificates of analysis from independent labs. Without third-party testing, you have no guarantee of purity or dosage accuracy.
- Avoid pre-made “PCT blends”: Supplement companies sometimes market proprietary blends as PCT support. These typically contain herbal ingredients like tribulus or ashwagandha, which do not meaningfully raise LH, FSH, or testosterone in someone with suppressed hormone production. They are not substitutes for SERMs.
- Community reputation: Bodybuilding forums with long histories and active moderation tend to maintain vendor review threads. Cross-referencing multiple sources of feedback is more reliable than trusting a single recommendation.
Timing Your PCT Correctly
Starting PCT too early or too late undermines the whole effort. If you begin SERMs while synthetic hormones are still active in your body, the medication is fighting a losing battle because your system still detects exogenous hormones and won’t restart production. If you wait too long, you spend unnecessary weeks in a low-testosterone state, losing muscle and feeling terrible.
The timing depends on the half-life of what you used. Short-acting compounds like testosterone propionate clear within a few days, so PCT can start roughly three to five days after your last dose. Long-acting compounds like testosterone enanthate or nandrolone decanoate take about two weeks to clear sufficiently. Oral-only cycles using compounds with short half-lives can transition to PCT within days. For SARMs, most have half-lives under 24 hours, so PCT can begin the day after your last dose.
If you used HCG during your cycle, continue it into the first week or two of PCT and then stop, letting the SERMs carry you through the remaining weeks. Running HCG for too long during PCT can actually work against recovery by keeping your brain from restarting its own signaling.