Home›HORMONAL HEALTH & TESTOSTERONE›Tamoxifen (Nolvadex)

Tamoxifen (Nolvadex)

Evidence: ★★★★☆ · Status: Prescription, Off-Label

💡 Did you know? Tamoxifen blocks estrogen in breast tissue but mimics it in bone — a 'selective' drug that's anti-estrogen in one place and pro-estrogen in another.

In plain English

Blocks estrogen at the chest to stop breast-tissue growth, and kick-starts the body's hormone system back on after a steroid cycle.

How it works

SERM — antagonist at breast-tissue ESR1 (blocks gyno) while agonising it at the hypothalamus (restarts LH/FSH after a cycle).

Molecular target & official sources

ESR1 (NCBI Gene) · Tamoxifen (PubChem CID 2733526)

Bottom line

Core post-cycle-therapy and anti-gyno drug.

Helps with: Hormones & Testosterone

Stacks with

Shares a pathway — often paired with: Omega-3 (EPA/DHA), Vitamin D3 (+ K2), Testosterone (TRT), Finasteride / Dutasteride.

Availability & where to buy

Prescription only. Prescription-only — a doctor must prescribe it. Not sold over the counter. (In Singapore: HSA-regulated.)

How it works: the Nuclear receptors pathway →

Common questions

Does Tamoxifen (Nolvadex) actually work?

Human-evidence rating: 4 of 5. Core post-cycle-therapy and anti-gyno drug.

Is Tamoxifen (Nolvadex) legal or approved?

Regulatory status: Prescription, Off-Label.