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Toremifene Side Effects

In Summary

Commonly reported side effects of toremifene include: hot flash, nausea, vaginal discharge, and diaphoresis. Other side effects include: dizziness, edema, and vomiting. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to toremifene: oral tablet

As well as its needed effects, toremifene may cause unwanted side effects that require medical attention.

Also, because of the way this medicine acts on the body, there is a chance that it might cause other unwanted effects that may not occur until months or years after the medicine is used. Some patients who have used toremifene have developed cancer of the uterus (womb), although it is not known for sure if it was caused by the medicine. Discuss this possible effect with your doctor.

Major Side Effects

If any of the following side effects occur while taking toremifene, check with your doctor immediately:

Less common:
  • Abdominal or stomach pain
  • anxiety
  • arm, back, or jaw pain
  • blurred vision
  • change in vaginal discharge
  • changes in skin color
  • changes in vision
  • chest pain or discomfort
  • chest tightness or heaviness
  • confusion
  • constipation
  • cough
  • decreased urine output
  • depression
  • dilated neck veins
  • dizziness or lightheadedness
  • dry mouth
  • extreme fatigue
  • fainting
  • fast, slow, or irregular heartbeat
  • headache
  • inability to speak incoherent speech
  • increased urination
  • irregular breathing
  • irregular heartbeat
  • loss of appetite
  • metallic taste
  • muscle weakness
  • nausea
  • pain or discomfort in the arms, jaw, back, or neck
  • pain or feeling of pressure in the pelvis
  • pain, tenderness, or swelling of the foot or leg
  • seizures
  • severe or sudden headache
  • shortness of breath
  • slurred speech
  • sudden shortness of breath or troubled breathing
  • sweating
  • swelling of the face, fingers, feet, or lower legs
  • temporary blindness
  • tenderness, pain, swelling, warmth, skin discoloration, and prominent superficial veins over the affected area
  • thirst
  • tightness in the chest
  • troubled breathing
  • unusual tiredness
  • vaginal bleeding
  • vomiting
  • weakness in the arm and/or leg on one side of the body, sudden and severe
  • weight gain
  • weight loss
  • wheezing
  • Chest pain
Incidence not known:
  • Black, tarry stools
  • bleeding gums
  • blood in the urine or stools
  • chills
  • clay-colored stools
  • dark urine
  • dizziness
  • fever
  • headache
  • itching
  • painful or difficult urination
  • pinpoint red spots on the skin
  • rash
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • swollen glands
  • unpleasant breath odor
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • vomiting of blood
  • yellow eyes or skin

Minor Side Effects

Some toremifene side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common:
  • Blindness
  • decreased vision
  • dry eyes
  • feeling of warmth
  • redness of the face, neck, arms, and occasionally, upper chest
  • sudden sweating
  • sweating
  • white or brownish vaginal discharge
Less common:
  • Bone pain
  • changes in vision
  • double vision
  • eye pain
  • tearing
Incidence not known:
  • Blistering, crusting, irritation, itching, or reddening of the skin
  • cracked, dry, or scaly skin
  • depression
  • difficulty having a bowel movement (stool)
  • dizziness or lightheadedness
  • feeling of constant movement of self or surroundings
  • feeling unusually cold
  • hair loss
  • itching skin
  • lack or loss of strength
  • partial or slight paralysis
  • sensation of spinning
  • shakiness in the legs, arms, hands, or feet
  • shivering
  • thinning of the hair
  • trembling or shaking of the hands or feet

For Healthcare Professionals

Applies to toremifene: oral tablet


Hot flashes (35%), sweating (20%), and dizziness (9%) have been reported.[Ref]


Gastrointestinal effects including nausea (14%) and vomiting (4%) have been reported.[Ref]


Genitourinary effects including vaginal discharge (13%) and vaginal bleeding (2%) have been reported.[Ref]


Ocular effects including cataracts (up to 10%), dry eyes (up to 9%), abnormal visual fields (up to 4%), corneal keratopathy (up to 2%), glaucoma (<1% to 1.5%) and abnormal vision/diplopia (up to 1.5%) have been reported.[Ref]


Cardiovascular effects including edema (5%), arrhythmia (up to 1.5%), cardiac failure (up to 1%), myocardial infarction (up to 1%), angina pectoris (<1%), and QT interval prolongation have been reported.[Ref]


Hematologic effects including hypercalcemia (3%), pulmonary embolism (up to 2%), thrombophlebitis (up to 2%), CVA/TIA (up to 2%), and thrombosis (up to 1.5%) have been reported.[Ref]


Hepatic effects including elevated test results in the following percent of patients have been reported, SGOT (5% to 19%), alkaline phosphatase (8% to 19%), and bilirubin (1% to 1.5%). Toxic hepatitis has also been reported.[Ref]


1. "Product Information. Fareston (toremifene)." Schering Laboratories, Kenilworth, NJ.

It is possible that some side effects of toremifene may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

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