Generic name: Toremifene citrate.

Fareston is an anti-estrogen antineoplastic. It prevents the growth of rapidly dividing cells such as cancer cells. 

Quick Facts About Fareston


Used to treat metastatic breast cancer in post-menopausal women; is most effective in stopping the type of breast cancer that thrives on estrogen. Also used to treat cancer that has spread to other parts of the body.

Fareston Dosage

Take exactly as prescribed. Do not discontinue use unless directed by your doctor. May need to take Fareston for several years.

  • Usual adult dose: one 60-milligram tablet once per day until disease progression is observed.
  • Usual child dose: not prescribed for children.
  • Missed dose: take as soon as possible, unless almost time for next dose. In that case, do not take missed dose; go back to regular schedule. Do not double doses.

Fareston Side Effects

Overdose symptoms:

dizziness, nausea, and vomiting as well as reversible hallucinations and loss of muscle coordination. If you suspect an overdose, immediately seek medical attention.

More common side effects: abnormal or double vision, cataracts, dizziness, dry eyes, elevated liver function, hot flashes, nausea, sweating, swelling, vomiting. Side effects usually occur at the beginning of treatment.

Less common Fareston side effects: blood dot, chest pain, glaucoma, heart failure, high blood calcium levels, inflamed’ cornea, stroke, vaginal bleeding or discharge. Rare side effects: angina, appetite loss, constipation, depression, dizziness, hair loss, irregular heartbeat, jaundice, low white blood cell or platelet count, partial paralysis, rigors, skin discoloration or itching, tremor, upset stomach, weakness.


Inform your doctor before combining Fareston with:

anticoagulants such as warfarin (Coumadin); anticonvulsants such as phenobarbital (Solfoton), phenytoin (Dilantin), and carbamazepine (Tegretol); antifungals such as ketoconazole (Nizoral); erythromycin and similar antibacterials; thiazide diuretics such as hydrochlorothiazide (HydroDIURIL).

No known food/other substance interactions.

Special Cautions

If pregnant or planning to become pregnant, inform your doctor immediately. Appears in breast milk; could affect a nursing infant.

No special precautions apply to seniors.

Not prescribed for children.

  • Do not take if sensitive to or allergic to this medication.
  • Doctor should perform routine gynecological exams. Immediately report any abnormal vaginal bleeding.
  • Immediately inform your doctor if you experience a visual problem.
  • May be a link between Fareston therapy and blood cell abnormalities such as too few white blood cells or platelets.
  • May cause abnormally high levels of calcium in the blood or tumor flare-up.
  • Doctor should monitor carefully if you have bone metastases.
  • Use with caution if you have a history of thromboembolism or other blood-clotting problems, or endometrial hyperplasia.


HealthSurvey.org provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Fareston side effects, please contact your healthcare provider.