Clomid PCT: The Complete Canadian Research Guide
Last updated: April 2026. Written by the Elite Bio Supply research team. Every product is sourced from verified pharmaceutical manufacturers, blister packed with batch identification, and inspected before dispatch.
Post cycle therapy is the window after an anabolic cycle where the body’s natural testosterone production is shut down and the hypothalamic pituitary testicular axis (HPTA) has to restart. Clomid, generic name clomiphene citrate, is the most studied and most used research compound for PCT. This page covers what Clomid is, how it works for PCT, the standard dosage ranges reported in the literature, a typical 4 week protocol, the side effects to monitor, and how Clomid compares to Nolvadex and enclomiphene.
Elite Bio Supply is a Canadian research compound supplier. Clomiphene citrate is a research compound, not a pharmaceutical or supplement, and is sold for in vitro and laboratory research purposes only. Nothing on this page is medical advice.
Quick answer (if you only read one paragraph)
Clomid PCT is a 4 week protocol where clomiphene citrate is used to block estrogen feedback at the hypothalamus, restoring LH and FSH output and restarting natural testosterone production after an anabolic cycle. The most commonly cited research dosage is 50 mg daily for the first two weeks and 25 mg daily for the second two weeks, sometimes preceded by a loading dose of 100 mg for the first few days. Clomid is typically run alongside Nolvadex (tamoxifen) at 20 mg per day. Side effects are well documented: mood shifts, visual disturbances at high dose, and HPTA suppression if misused. Clomiphene exists in two isomers, and the active one for HPTA recovery is enclomiphene, which is why many researchers now split the two and run enclomiphene alone.
Table of contents
- What is Clomid (clomiphene citrate)?
- How Clomid works for PCT
- Clomid PCT dosage: 25 mg, 50 mg, 100 mg
- Standard Clomid PCT protocol (4 weeks)
- Clomid side effects
- Clomid vs Nolvadex for PCT
- Clomid vs enclomiphene: the isomer question
- Bloodwork: what to test and when
- Clomid in the Canadian research compound market
- FAQ
What is Clomid (clomiphene citrate)?
Clomid is the brand name for clomiphene citrate, a selective estrogen receptor modulator (SERM) first approved in 1967 for female infertility. Its structure is a mixed agonist and antagonist: it blocks estrogen receptors in some tissues (the hypothalamus) and activates them in others (the liver, where it can have mild lipid effects). Because it acts at the hypothalamus, clomiphene interrupts the negative feedback loop that estrogen normally exerts on gonadotropin releasing hormone (GnRH), which cascades into higher luteinizing hormone (LH) and follicle stimulating hormone (FSH) output from the pituitary and in turn drives the testes to resume testosterone production.
Clomiphene citrate is sold in Canada as a prescription pharmaceutical for female infertility (DIN approved). As a research compound for PCT in men, it sits outside the DIN system and is imported or produced as a non prescription research reagent. EBS supplies clomiphene citrate 100 mg tablets, 30 count, at $100 CAD regular and $50 CAD sale. Sealed and labelled from a verified pharmaceutical manufacturer, blister packed with batch identification, and inspected before dispatch.
Clomiphene is made up of two isomers in roughly a 62/38 ratio: enclomiphene (the trans isomer, purely an estrogen antagonist at the hypothalamus) and zuclomiphene (the cis isomer, a weak estrogen agonist with a long half life). The HPTA recovery effect is driven almost entirely by enclomiphene. Zuclomiphene is responsible for most of the reported mood and vision side effects. This is why splitting the two and running pure enclomiphene has become more common in the last five years.
How Clomid works for PCT
After an anabolic cycle, exogenous androgens have suppressed the HPTA. The hypothalamus is no longer releasing GnRH, the pituitary is not making LH or FSH, and the testes have stopped producing testosterone and sperm. Left alone, recovery can take months or years, and in some cases never fully returns.
Clomid accelerates this by blocking estrogen receptors at the hypothalamus. The hypothalamus reads this block as “there is no estrogen in the system” and responds by ramping GnRH output back up. GnRH triggers LH and FSH release from the pituitary, which tells the testes to resume endogenous testosterone and sperm production.
The cascade in one line: Clomid blocks estrogen feedback → hypothalamus releases GnRH → pituitary releases LH and FSH → testes produce testosterone.
This is why Clomid is a cornerstone of PCT protocols. It restarts the axis at the top rather than replacing anything downstream.
Clomid PCT dosage: 25 mg, 50 mg, 100 mg
Dosages reported in the research and bodybuilding literature fall into three tiers:
25 mg daily
The low end. Often used for the final 1 to 2 weeks of a PCT protocol to taper down, or for researchers running a mild recovery after a short or low dose cycle. Well tolerated, fewer visual and mood side effects. 25 mg is also the most common maintenance dose for hypogonadal men on long term clomiphene monotherapy outside PCT.
50 mg daily
The standard PCT dose. Reported in almost every bodybuilding PCT protocol for the first 2 to 4 weeks post cycle. Enough to reliably suppress estrogen feedback at the hypothalamus and drive LH and FSH recovery. The trade off is a meaningful incidence of mood shifts and occasional visual disturbances in a subset of users.
100 mg daily
Loading or frontload dose. Used for the first 3 to 7 days of a protocol to accelerate axis restart, then stepped down to 50 mg. Not a sustainable maintenance dose. Side effect incidence climbs noticeably above 50 mg per day.
A full dosage breakdown with frontload comparisons, taper schedules, and weight based adjustments is on the Clomid PCT dosage page.
Standard Clomid PCT protocol (4 weeks)
The classic bodybuilding PCT protocol, used for moderate cycles:
| Week | Clomid | Nolvadex (tamoxifen) |
|---|---|---|
| Week 1 | 50 mg daily | 20 mg daily |
| Week 2 | 50 mg daily | 20 mg daily |
| Week 3 | 25 mg daily | 20 mg daily |
| Week 4 | 25 mg daily | 20 mg daily |
Timing reported in the literature: the start point depends on ester half life. For short esters (testosterone propionate, trenbolone acetate), published protocols begin 3 to 4 days after last administration. For long esters (testosterone enanthate, cypionate), the reported clearance window is 14 to 18 days. For nandrolone decanoate, the literature recommends 3 weeks or more. Beginning a PCT protocol while exogenous androgens remain at supraphysiological levels is reported to be ineffective because the HPTA feedback loop cannot restart while the testes are still suppressed.
For heavier cycles: some researchers frontload with 100 mg Clomid daily for the first 3 to 7 days, then drop to 50 mg. Others extend the protocol to 6 weeks. Others add hCG at 500 to 1000 IU twice weekly during the last 2 to 3 weeks of the cycle (not during PCT) to keep testicular volume up and make recovery faster.
For fertility (not PCT): clomiphene monotherapy at 25 mg every other day is the common starting point for hypogonadal men trying to preserve or restore fertility while avoiding TRT. This is a long term protocol (6 to 12 months), not a PCT.
A week by week protocol with daily dosing tables for short ester, long ester, and heavy cycle scenarios is on the Clomid PCT protocol page.
Clomid side effects
Clomid is well tolerated by most users at PCT doses, but the side effect profile is real and worth monitoring.
Common:
– Mood shifts, irritability, emotional blunting (driven mostly by zuclomiphene)
– Reduced libido during PCT (temporary; resolves as testosterone recovers)
– Headache
– Hot flashes
Less common:
– Visual disturbances: blurring, floaters, light sensitivity. Usually dose dependent and reversible on discontinuation. If visual symptoms appear, researchers typically discontinue and re evaluate.
– Gynecomastia rebound (rare; usually a sign of under dosed PCT or estrogen mismanagement)
– Mild liver enzyme elevation in high dose or extended protocols
What to watch for:
– Vision changes of any kind. Stop the compound.
– Mood changes severe enough to affect daily function. Consider switching to enclomiphene monotherapy or tamoxifen only.
– No return of libido or morning erections by week 6 post PCT. Bloodwork needed.
Full side effect review including long term clomiphene monotherapy data is on the Clomid PCT side effects page.
Clomid vs Nolvadex for PCT
Both are SERMs. Both block estrogen feedback. They are not interchangeable.
| Feature | Clomid (clomiphene citrate) | Nolvadex (tamoxifen citrate) |
|---|---|---|
| Site of action | Hypothalamus (primary) | Breast tissue (primary), hypothalamus (secondary) |
| PCT role | Restarts HPTA, drives LH and FSH | Blocks gyno, mild HPTA support |
| Standard PCT dose | 25 to 50 mg daily | 20 to 40 mg daily |
| Mood side effects | Moderate to high | Low |
| Vision side effects | Possible at high dose | Very rare |
| Lipid effects | Neutral to mildly positive | Neutral to mildly positive |
| IGF 1 effect | Minimal | Lowered (consideration for GH stacks) |
The short version: Clomid drives recovery. Nolvadex protects the chest and supports recovery. Most protocols run them together. For mild cycles, Nolvadex alone is sometimes enough. For heavier cycles, Clomid is the workhorse.
Full comparison including dosing overlap, stacking strategy, and when to run one without the other is on the Clomid vs Nolvadex for PCT page.
Clomid vs enclomiphene: the isomer question
Clomiphene citrate is 62% enclomiphene and 38% zuclomiphene. Enclomiphene is the trans isomer, a pure estrogen antagonist, and is responsible for the HPTA recovery effect. Zuclomiphene is the cis isomer, a weak estrogen agonist with a long half life (about 30 days) and is responsible for most of the mood and vision side effects.
Running pure enclomiphene gives the same HPTA restart effect with much less side effect load. The trade off: enclomiphene is a newer compound, more expensive, and the research database is smaller than clomiphene’s 50+ years of clinical data.
For PCT, enclomiphene at 12.5 to 25 mg daily has been reported to produce LH and FSH increases comparable to clomiphene at 50 mg daily, without the zuclomiphene overhang (Wiehle 2013, Earl 2019). This is why many researchers have switched.
See enclomiphene vs clomid for the full comparison and the enclomiphene product page for the EBS listing.
Bloodwork: what to test and when
The only way to know PCT is working is to test. Recommended panels:
Pre cycle baseline:
– Total testosterone
– Free testosterone
– Estradiol (sensitive assay)
– LH, FSH
– SHBG
– Full lipid panel
– CBC, CMP, liver panel
Mid cycle (optional, week 4 to 8):
– Total testosterone (confirm shutdown)
– Estradiol (manage aromatization)
– Liver panel (for hepatotoxic compounds)
Post PCT (4 weeks after PCT ends):
– Total testosterone (target: return to baseline)
– Free testosterone
– Estradiol
– LH, FSH (target: return to baseline)
Canadian options for private bloodwork: Lifelabs, Dynacare, and Bioron all accept private pay requisitions. Rocky Mountain Analytical in Calgary and Bioron in Mississauga are the most commonly used by the research community.
Clomid in the Canadian research compound market
Clomiphene citrate is a research compound in Canada when sold outside the DIN pharmaceutical channel. The Canadian research supplier market has consolidated since 2024: several established suppliers have exited or scaled back, including Peptide Sciences, which closed in March 2026. That leaves a gap that EBS is built to fill.
What EBS does differently:
– Verified pharmaceutical sourcing. Sealed, labelled products from verified pharmaceutical manufacturers. Blister packed with batch identification. Every order inspected before dispatch.
– Canadian owned and shipped. Canada Post domestic shipping, 2 to 5 business days. No CBSA seizure risk.
– CAD pricing, no FX surprise. $50 CAD on sale, not a USD price converted at checkout.
– Reship on seizure. If Canada Post returns or detains a package due to inspection, we reship once at no cost.
– Interac e Transfer and BTC. No credit card processors that freeze research compound merchants.
See our How we verify quality page for the full sourcing and inspection process.
FAQ
What is clomid PCT?
Clomid PCT is a 4 week protocol using clomiphene citrate to restart natural testosterone production after an anabolic cycle. It blocks estrogen feedback at the hypothalamus, which restarts the LH and FSH output that drives testicular testosterone.
What is the best clomid dosage for PCT?
The most common protocol is 50 mg daily for weeks 1 and 2, then 25 mg daily for weeks 3 and 4. Heavier cycles sometimes frontload 100 mg daily for the first 3 to 7 days.
How long should a clomid PCT last?
Standard is 4 weeks. Heavy or long cycles may run 6 weeks. Anything beyond 6 weeks has diminishing returns and rising side effect risk.
Do I need Nolvadex with Clomid for PCT?
Most protocols run both. Clomid restarts the axis. Nolvadex blocks breast tissue estrogen receptors and reduces gyno risk. For mild cycles, Nolvadex alone is sometimes sufficient.
What are the side effects of clomid PCT?
Most common: mood shifts, reduced libido during the protocol, and hot flashes. Less common: visual disturbances at high dose, rebound gyno from under dosing, and mild liver enzyme elevation in long protocols.
Does clomid shut you down?
At PCT doses, no. The effect is at the hypothalamus and drives LH and FSH up, not down. Very high or very long clomiphene protocols can eventually cause mood driven libido loss that mimics shutdown, but the endocrine profile stays positive.
Can I run clomid instead of TRT?
Some hypogonadal men use low dose clomiphene (12.5 to 25 mg every other day) as an alternative to TRT to preserve fertility. This is a long term use case, not a PCT, and requires ongoing bloodwork.
Is clomid legal in Canada?
Clomid is a Schedule F prescription drug as a pharmaceutical (DIN approved for female infertility). As a research compound sold outside the DIN system, it is imported and sold as a non prescription research reagent for in vitro and laboratory use. EBS does not sell compounds for human consumption.
Where can I buy clomid in Canada?
EBS ships clomiphene citrate 100 mg tablets, 30 count domestically across Canada. $50 CAD on sale. Sealed and labelled from a verified pharmaceutical manufacturer with batch identification. Canada Post 2 to 5 day shipping with seizure reship.
How is clomid different from enclomiphene?
Clomid is a 62/38 mix of enclomiphene and zuclomiphene. Enclomiphene is the active isomer for HPTA recovery. Zuclomiphene causes most of the mood and vision side effects. Pure enclomiphene gives similar LH and FSH effect with a cleaner side effect profile. See enclomiphene vs clomid.
References
1. Moskovic DJ, Katz DJ, Akhavan A, et al. (2012). “Clomiphene citrate is safe and effective for long term management of hypogonadism.” *BJU International*. PMID: 22458540.
2. Ramasamy R, Scovell JM, Kovac JR, Lipshultz LI. (2014). “Testosterone supplementation versus clomiphene citrate for hypogonadism: an age matched comparison of satisfaction and efficacy.” *Journal of Urology*. PMID: 24657837.
3. Wiehle RD, Fontenot GK, Wike J, et al. (2013). “Enclomiphene citrate stimulates testosterone production while preventing oligospermia: a randomized phase II clinical trial comparing topical testosterone.” *Fertility and Sterility*. DOI: 10.1016/j.fertnstert.2013.02.040.
4. Wiehle RD, Cunningham GR, Pitteloud N, et al. (2014). “Testosterone restoration by enclomiphene citrate in men with secondary hypogonadism: pharmacodynamics and pharmacokinetics.” *Fertility and Sterility*. PMID: 25044085.
5. Earl JA, Kim ED. (2019). “Enclomiphene citrate: a treatment that maintains fertility in men with secondary hypogonadism.” *Expert Review of Endocrinology and Metabolism*. PMID: 31063005.
6. Katz DJ, Nabulsi O, Tal R, Mulhall JP. (2012). “Outcomes of clomiphene citrate treatment in young hypogonadal men.” *BJU International*. PMID: 22044663.
7. Kim ED, McCullough A, Kaminetsky J. (2016). “Oral enclomiphene citrate raises testosterone and preserves sperm counts in obese hypogonadal men, unlike topical testosterone.” *BJU International*. PMID: 26496621.
Research compound disclaimer
Clomiphene citrate sold by Elite Bio Supply is a research compound intended for in vitro and laboratory research use only. It is not for human or veterinary consumption, not a pharmaceutical, not a dietary supplement, and has no DIN. Nothing on this page constitutes medical advice. Always consult a qualified healthcare provider about medical decisions.