Toremifene

USES:
This medication is used by women after menopause to treat breast cancer, which requires estrogen to grow.

IUPAC name: 2-[4-[(Z)-4-chloro-1,2-diphenylbut-1-enyl]phenoxy]-N,N-dimethylethanamine

Drug class: Nonsteroidal antiestrogen

Route of administration: Oral

Is it a drug that needs a prescription? YES

Is it an OTC drug? NO

Mechanism of action
Toremifene works as a nonsteroidal antiestrogen and helps to prevent invasive breast cancer by suppressing the harmful effects of estrogen on breast tissues.

Side effects

Common side effects may include nausea, dizziness, vomiting, hot flashes, sweating.

Serious side effects may include swelling, pain in muscle/joint, depressed mood, blurred vision, swelling in the ankles or feet, feeling of fatigue, unusual vaginal bleeding, undiagnosed vaginal discharge, abdominal pain.

Precautions
Before using this medication, take the following precautions and notify your doctor:

Avoid it if you are allergic to it or have other allergies. 
If you have a medical history of anemia, diabetes, stroke, heart attack, hypertension, hepatic disease, metastases, blood clots, uterus problems. 
Limit alcohol consumption, as it makes you more  drowsy.
This medication should not be given during pregnancy as it may harm the fetus.