ATC Group: L02BA Anti-estrogens

Elacestrant, a tetrahydronaphthalene compound, is a potent, selective and orally active estrogen receptor-α (ERα) antagonist and degrader. Elacestrant inhibits the estradiol-dependent and independent growth of ERα-positive breast cancer cells, including models harbouring estrogen receptor 1 (ESR1) gene mutations.

Fulvestrant is a competitive estrogen receptor (ER) antagonist with an affinity comparable to estradiol. Fulvestrant blocks the trophic actions of estrogens without any partial agonist (estrogen-like) activity.

Tamoxifen is a non-steroidal, triphenylethylene-based drug which displays a complex spectrum of oestrogen antagonist and oestrogen agonist-like pharmacological effects in different tissues.

Toremifene is a nonsteroidal triphenylethylene derivative that binds to estrogen receptors and may produce estrogenic, anti-estrogenic or both effects, depending upon the duration of treatment, animal species, gender, target organ and variable selected. Toremifene is indicated in first line hormone treatment of hormone-dependent metastatic breast cancer in postmenopausal patients.