Clomid PCT Protocol: 4 Week and 6 Week Schedules by Cycle Type
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.
This is a sub page of the Clomid PCT pillar guide covering only the protocol schedules: when to start, week by week dosing, how the schedule changes by cycle type, and the verification checkpoints that tell a researcher whether the protocol is working. For the broader context on what Clomid is, how it works, and how it compares to other SERMs, the pillar is the better starting point.
Quick answer (if you only read one paragraph)
The standard Clomid PCT protocol is 4 weeks: 50/50/25/25 mg daily Clomid plus 20 mg daily Nolvadex across all four weeks. Start timing depends on the ester half life of the androgen used: short esters begin 3 to 4 days after last administration, long esters begin 14 to 18 days after, and nandrolone decanoate begins 3 weeks or more after. Heavier cycles extend to 6 weeks and add a 100 mg Clomid frontload for the first 3 to 7 days. Trenbolone and nandrolone protocols extend to 6 weeks because the recovery profile is longer. Bloodwork at week 4 post PCT verifies whether the axis has restarted; if testosterone, LH, and FSH are not approaching baseline, the protocol needs to extend or switch.
Table of contents
- The standard 4 week protocol
- The 6 week heavy cycle protocol
- Start timing by ester
- Trenbolone and nandrolone protocols
- SARM only protocols
- hCG bridge before PCT (not during)
- Verification checkpoints
- When to extend, abort, or switch
- Bloodwork schedule across the protocol
- FAQ
The standard 4 week protocol
The most cited Clomid PCT protocol in published bodybuilding literature, used for moderate cycles (testosterone 300 to 500 mg per week, single compound, no orals, 8 to 12 week duration):
| Week | Clomid | Nolvadex |
|---|---|---|
| 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 |
This is the protocol to default to without specific reasons to deviate. It maps to the dose response curve where 50 mg saturates HPTA recovery for most researchers, 25 mg provides taper coverage, and 20 mg Nolvadex covers breast tissue protection across the full 4 weeks.
Total compound usage for one complete 4 week protocol:
– Clomid: 14 days at 50 mg + 14 days at 25 mg = 1,050 mg total. From a 30 tablet bottle of 100 mg Clomid, this is 10.5 tablets used. One bottle covers one full protocol with margin.
– Nolvadex: 28 days at 20 mg = 560 mg total.
The 6 week heavy cycle protocol
For heavier cycles (testosterone above 500 mg per week, multi compound, oral inclusion, longer duration), the protocol extends to 6 weeks and adds a frontload at the start.
| Week | Clomid | Nolvadex |
|---|---|---|
| Days 1 to 5 | 100 mg daily (frontload) | 20 mg daily |
| Days 6 to 14 | 50 mg daily | 20 mg daily |
| Week 3 to 4 | 50 mg daily | 20 mg daily |
| Week 5 to 6 | 25 mg daily | 20 mg daily |
The frontload pulse is bounded to 5 days because side effect incidence climbs sharply above 50 mg per day on extended dosing. The 6 week duration gives the HPTA more time to recover from the deeper suppression of a heavy cycle. Bloodwork at the end of week 6 verifies completion; if numbers are still off baseline, the protocol may need to extend further.
For the full dosage rationale and the dose response curve, see Clomid PCT dosage.
Start timing by ester
Timing in published protocols depends on the ester half life of the androgen used. The principle is that PCT cannot succeed while exogenous androgens are still present at supraphysiological levels, because the feedback loop cannot restart while the testes are still suppressed by circulating androgens.
| Compound | Ester | Half life | Start PCT |
|---|---|---|---|
| Testosterone propionate | Propionate | 0.8 days | 3 to 4 days after last administration |
| Trenbolone acetate | Acetate | 1 day | 3 to 4 days after last administration |
| Testosterone enanthate | Enanthate | 5 days | 14 to 18 days after last administration |
| Testosterone cypionate | Cypionate | 7 days | 14 to 18 days after last administration |
| Trenbolone enanthate | Enanthate | 5 days | 14 to 18 days after last administration |
| Nandrolone decanoate | Decanoate | 7 to 12 days | 21 days or more after last administration |
| Boldenone undecylenate | Undecylenate | 14 days | 28 days or more after last administration |
The general rule reported in protocols: wait approximately 3 half lives after the last administration before beginning PCT. Three half lives reduces circulating androgen to roughly 12 percent of peak, low enough for the HPTA feedback loop to begin restarting.
Trenbolone and nandrolone protocols
Trenbolone and nandrolone deserve specific protocol notes because their progestin activity changes the recovery profile.
Trenbolone (acetate, enanthate): strong progestin activity in addition to androgenic activity. Recovery is generally slower and prolactin management is sometimes needed during PCT. Cabergoline (cabergoline) at 0.25 mg twice weekly is reported in some protocols where prolactin is elevated, though this is outside SERM PCT. The 6 week protocol with frontload is the typical approach.
Nandrolone decanoate: very long ester half life and significant progestin activity. The start timing is the latest of any common androgen (3 weeks or more after last administration). The 6 week protocol with frontload is standard. Some researchers extend to 8 weeks for long nandrolone runs.
For both compounds, the bloodwork checkpoints become more important because the recovery curve is less predictable than for testosterone esters alone.
SARM only protocols
SARM only cycles (LGD 4033, RAD 140, MK 2866 standalone or stacked) suppress the HPTA less than anabolic androgenic steroid cycles, but suppression is not zero. PCT remains advisable for cycles longer than 4 weeks or at higher doses.
A typical SARM only PCT:
| Week | Clomid | Nolvadex |
|---|---|---|
| Week 1 | 25 mg daily | 20 mg daily |
| Week 2 | 25 mg daily | 20 mg daily |
| Week 3 | 12.5 mg daily | 10 mg daily |
| Week 4 | 12.5 mg daily | 10 mg daily |
For very short SARM cycles (under 4 weeks at low dose), Nolvadex monotherapy at 20 mg daily for 3 weeks is sometimes sufficient. Bloodwork is the verification step.
hCG bridge before PCT (not during)
Human chorionic gonadotropin (hCG) is sometimes used as a “bridge” in the last 2 to 3 weeks of an anabolic cycle (not during PCT itself) to keep testicular volume up and prepare the testes for restart. The reported protocol is 500 to 1000 IU twice weekly.
The rationale: long suppressed testes can become functionally atrophied and slow to respond to LH and FSH signal when the SERM PCT begins. Pre-PCT hCG keeps the Leydig cells responsive so when LH signal returns, the testes restart faster.
Important: hCG should be discontinued before SERM PCT begins. Running hCG concurrently with Clomid suppresses the LH signal that the SERM PCT is meant to restore, which defeats the purpose. The standard sequence is: hCG bridge during the last 2 to 3 weeks of cycle, full cycle washout window (depends on ester), then SERM PCT.
EBS does not sell hCG. Researchers running this protocol source it elsewhere.
Verification checkpoints
Three bloodwork checkpoints across the full PCT cycle:
Checkpoint 1: pre cycle baseline (before starting the anabolic cycle). Establishes the recovery target.
– Total testosterone, free testosterone
– Estradiol (sensitive assay)
– LH, FSH
– SHBG
– Lipid panel
– CBC, CMP, liver panel
Checkpoint 2: end of PCT (week 4 or week 6 depending on protocol).
– Total testosterone, free testosterone
– Estradiol
– LH, FSH
Checkpoint 3: 4 weeks post PCT (4 weeks after Clomid is discontinued).
– Total testosterone, free testosterone
– Estradiol
– LH, FSH (target: return to baseline)
– Lipid panel
The 4 weeks post PCT bloodwork is the most important. It confirms whether the HPTA has restarted unassisted by the SERMs. If LH and FSH have not returned to baseline range and total testosterone is still low, the recovery is incomplete and additional intervention is warranted.
When to extend, abort, or switch
Three scenarios where the standard protocol gets modified.
Extend the protocol when bloodwork at end of week 4 shows LH and FSH still suppressed and total testosterone still low. The HPTA has not yet restarted. Continue Clomid at 25 mg daily for an additional 2 to 4 weeks, recheck bloodwork.
Abort the protocol when significant side effects appear: visual disturbances of any severity, mood changes severe enough to affect daily function, or any signs of thromboembolism (rare but documented). Discontinue the compound and re evaluate. If the side effect is zuclomiphene driven (vision, mood), switching to enclomiphene monotherapy is the typical next step. See enclomiphene vs clomid.
Switch the protocol when the reaction to clomiphene is poor but PCT is still required. Common switches: Clomid to enclomiphene (cleaner side effect profile), or Clomid to Nolvadex monotherapy at 40 mg daily for 2 weeks then 20 mg for 2 weeks (if the cycle was light enough to recover on tamoxifen alone).
Bloodwork schedule across the protocol
A consolidated bloodwork timeline for a standard 4 week protocol:
| Timing | Panel | Purpose |
|---|---|---|
| Week 0 (pre cycle) | Full baseline | Establish recovery target |
| Week 4 of cycle (mid cycle, optional) | Total T, estradiol, liver panel | Confirm cycle is working as expected |
| Day 1 of PCT | Total T, estradiol | Confirm shutdown and starting point |
| End of week 4 PCT | Total T, free T, estradiol, LH, FSH | Confirm direction of recovery |
| 4 weeks post PCT | Full panel | Confirm recovery completed |
Canadian options for private bloodwork: Lifelabs and Dynacare cover most provinces with private pay requisitions. Rocky Mountain Analytical in Calgary and Bioron in Mississauga are commonly used by the research community for direct to consumer panels without a doctor’s requisition.
FAQ
What is the standard Clomid PCT protocol?
50 mg Clomid daily for the first two weeks of a 4 week protocol, dropping to 25 mg daily for weeks three and four. Pair with 20 mg Nolvadex daily across all four weeks.
When should I start Clomid PCT after my last injection?
Depends on the ester. Short esters (propionate, trenbolone acetate) begin 3 to 4 days after last injection. Long esters (enanthate, cypionate) begin 14 to 18 days after. Nandrolone decanoate begins 3 weeks or more after.
How long should a Clomid PCT last?
4 weeks for moderate cycles, 6 weeks for heavy cycles. Anything beyond 6 weeks has diminishing returns and rising side effect risk.
Can I run Clomid PCT after a SARM cycle?
Yes, at lower doses than for AAS PCT: 25/25/12.5/12.5 mg Clomid plus 20/20/10/10 mg Nolvadex. Very short or low dose SARM cycles may not require full SERM PCT.
Do I need hCG before Clomid PCT?
Not required. hCG as a bridge during the last 2 to 3 weeks of a cycle (not during PCT itself) is reported in heavy or long suppression protocols to keep testicular volume up. EBS does not sell hCG.
What bloodwork do I need for Clomid PCT?
Pre cycle baseline, optional mid cycle check, and 4 weeks post PCT. The 4 weeks post PCT panel is the most important: it confirms whether LH, FSH, and testosterone have returned to baseline.
What if my testosterone is still low at the end of PCT?
Extend the protocol at 25 mg daily for an additional 2 to 4 weeks and recheck bloodwork. If testosterone is still suppressed after extension, the recovery may need a longer monotherapy approach or a switch to enclomiphene.
Can I run Clomid PCT after trenbolone or nandrolone?
Yes, but the protocol extends to 6 weeks (sometimes 8 for long nandrolone runs) and start timing is later because of the longer ester half lives and the progestin component. Frontloading is typical.
Where can I buy clomiphene citrate in Canada?
EBS ships clomiphene citrate 100 mg, 30 tablets 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 many tablets does one PCT use?
A standard 4 week 50/50/25/25 protocol uses approximately 10.5 of 100 mg tablets. The 30 tablet pack covers one complete protocol with significant margin for frontload or extension.
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, 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.
4. 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.
5. Katz DJ, Nabulsi O, Tal R, Mulhall JP. (2012). “Outcomes of clomiphene citrate treatment in young hypogonadal men.” *BJU International*. PMID: 22044663.
Research compound disclaimer
The compounds referenced on this page are sold by Elite Bio Supply as research compounds intended for in vitro and laboratory research use only. They are not for human or veterinary consumption, not pharmaceuticals, not dietary supplements, and have no DIN. Nothing on this page constitutes medical advice. Always consult a qualified healthcare provider about medical decisions.