Fareston or Toremifene Citrate is a Selective Estrogen Receptor Modulator (SERM) and is derived from triphenylethelyne. This drug is used by professional sportsmen to restore the production of natural testosterone after the same has been suppressed by use of harsh steroids or due to a medical complication. It is equally effective in inhibiting the formation of estrogens, which if left untreated, could lead to risks such as gynecomastia and fluid retention.

This drug stimulates hepatic metabolism and has an elimination half life of nearly 4-5 days. It allows and blocks specific estrogenic pathways so that users of Fareston do not bother about any side effect. It is also effective in reducing the level of LDL and total cholesterol besides exerting positive effect on blood lipids to improve bone mineral density.

The chemical name of Fareston is 2-{p-[(Z)-4-chloro-1,2-diphenyl-1-butenyl]phenoxy}-N,N-dimethylethylamine citrate (1:1) and its molecular weight is 598.10 g/mol at the base. The molecular formula of Fareston is C26H28CINO • C6H8O7. The active ingredient of Fareston tablets is toremifene citrate and its inactive ingredients are microcrystalline cellulose, povidone, sodium starch glycolate, colloidal silicon dioxide, lactose, magnesium stearate, and starch.

The recommended dose of Fareston (in tablet form) is 60 mg per day. It is important to note that pregnant women should not use this drug as it can result in fetal harm; this drug is also not recommended to individuals having an existing allergy to Fareston or any of its ingredients. When abused or of a low grade, use of Fareston can lead to side effects such as hot flashes, dizziness, vomiting, and nausea.