Tamoxifen is an antagonist of the estrogen receptor in breast tissue via its active metabolite, Hydroxytamoxifen. In other tissues such as the endometrium, it behaves as an agonist, and thus may be characterized as a mixed agonist/antagonist.
Tamoxifen is the usual endocrine (anti-estrogen) therapy for hormone receptor-positive breast cancer in pre-menopausal women, and is also a standard in post-menopausal women although aromatase inhibitors are also frequently used in that setting. However, Tamoxifen is popular with anabolic steroid users to reduce the build up of breast tissue (gynecomastia) caused by the excess aromatization of testosterone to estrogen.
Packaging: 60 capsules in a sealed pouch.
EACH CAPSULE CONTAINS:
Tamoxifen
USP
20mg
Excipients
q.s.
 
Dosage & administration:
Half life
5 days
Dose
20mg per day or every other day as required
Average Cycle Length
2 to 6 weeks
Anabolic #
n/a
Androgenic #
n/a
Oral Bioavailability
Estimated at 90%
CAS Name
(Z)-2-[4-(1,2-diphenylbut-1-enyl)phenoxy]-N,N-dimethylethanamine
Synonyms
Tamoxifen, Nolvadex, Genox, PCT