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Tamoxifen
Tamoxifen is a selective oestrogen receptor modulator (SERM). A triphenylethylene SERM: antagonist at breast tissue oestrogen receptors, agonist at others including bone and liver. Blocks hypothalamic oestrogen negative feedback, raising LH and FSH output.
Reference only. This page covers what the compound is, how it is presented and how it is handled. It does not give dosing protocols or administration schedules, and it is not medical advice.
Class and mechanism
Tamoxifen is a selective oestrogen receptor modulator (SERM). A triphenylethylene SERM: antagonist at breast tissue oestrogen receptors, agonist at others including bone and liver. Blocks hypothalamic oestrogen negative feedback, raising LH and FSH output.
How it is supplied
Tamoxifen is supplied as an oral tablet. Reported half-life: Long, approximately 5 to 7 days, with an active metabolite longer still. Storage: Cool, dry, dark.
| Listing | Strength | Price | Cost per mg | Stock |
|---|---|---|---|---|
| Tamoxifen - PHARMA | - | £22 | - | in stock |
| Quanta Pharma Tamoxifen 20mg | 20 mg | £25 | £1.25 per mg | out of stock |
Stocked at The PED Shop
Tamoxifen - PHARMAin stock£22- Quanta Pharma Tamoxifen 20mgout of stock£25
Availability checked 2026-09-08. The product page carries live stock.