The compounds people buy for PCT are SERMs (enclomiphene, clomiphene, tamoxifen) and the aromatase inhibitor anastrozole. Sarmguide’s current pick for all four is SwissChems. This page explains why, shows the products, and lists what to check before buying anywhere. Sarmguide earns a commission from partner links; that does not change what the evidence pages say.
Before buying: no PCT compound has been tested after SARMs. What each one does, and its risks, is on SARMs PCT.
Our current pick: SwissChems
We checked SwissChems’ public pages on 30 October 2026. What they state:
- Third-party testing per batch. Batches go to accredited third-party labs, mainly Janoshik Analytical, usually by HPLC. Each batch has a certificate of analysis (COA), and a batch must test within 10% of the labeled amount, either way.
- The full PCT range in capsules: enclomiphene 12.5 mg, clomiphene 25 mg, tamoxifen 20 mg and anastrozole 0.5 mg, next to SARMs and peptides.
- Payment options: US-issued Visa and Mastercard through a payment processor, bank and wallet transfers (including ACH and Zelle), and several cryptocurrencies.
- Shipping: US orders paid before 12 PM EST on business days ship the same day; free shipping on US orders over $100 and international orders over $300.
- Support: email, phone and live chat.
SwissChems sells these compounds for laboratory research use only. More on the company: SwissChems review.
The PCT compounds at SwissChems
What each compound is
| Compound | Type | Approved for | Key evidence in men | Fact sheet |
|---|---|---|---|---|
| Enclomiphene | SERM | Nothing (FDA and EU declined) | Raised testosterone and kept sperm counts in Phase 3 trials (EMA 2018) | Enclomiphene for men |
| Clomiphene (Clomid) | SERM | Ovulation problems in women | Raised testosterone, LH and FSH across 19 studies (Huijben 2022) | Clomiphene for men, Clomid PCT |
| Tamoxifen (Nolvadex) | SERM | Breast cancer (women and men) | Raised testosterone about 40% in healthy men (Birzniece 2010); prevents drug-induced breast growth (Boccardo 2005) | Nolvadex PCT |
| Anastrozole (Arimidex) | Aromatase inhibitor | Breast cancer in postmenopausal women | Raised testosterone in older men; lowered spine bone density over a year (Burnett-Bowie 2009) | Anastrozole for men |
What to check before buying PCT anywhere
- A COA for your batch. The batch or lot number on the certificate should match the one on your bottle, and the certificate should name the lab.
- Identity and amount, not only purity. A “99% pure” result says little if the capsule holds the wrong amount. When 44 products sold online as SARMs were tested in 2017, only 52% contained a SARM and only 41% contained the labeled amount (Van Wagoner 2017). That study covered SARMs, but it shows how far labels in this market can be from contents.
- The legal position where you live. Tamoxifen, clomiphene and anastrozole are prescription medicines in the US (tamoxifen label, clomiphene label, anastrozole label). Enclomiphene is not approved anywhere (EMA). Germany lists all four in its Anti-Doping Act annex (AntiDopG).
- Sport. All four are prohibited at all times by WADA (S4.1 and S4.2) (WADA 2026).
Before using any PCT compound
Suppression after a SARM cycle is a lab finding. A blood test after the SARM has cleared (total and free testosterone, SHBG, LH, FSH) shows whether there is anything to treat; see SARMs bloodwork and the PCT & Bloodwork Planner. In the LGD-4033 trial, hormones recovered within five weeks without any treatment (Basaria 2013).