Tamoxifen (20mg/capsule), 60 Capsules

Tamoxifen is a selective estrogen receptor modulator (SERM) that exhibits tissue-specific estrogen receptor (ER) agonist and antagonist activity. It interacts with ERα and ERβ, modulating gene transcription and receptor-mediated signaling pathways.

This compound undergoes hepatic metabolism primarily via cytochrome P450 enzymes (CYP3A4, CYP2D6, CYP2C9), producing active metabolites such as 4-hydroxytamoxifen and endoxifen, which contribute to its prolonged activity.