What is Toremifene used for?
Toremifene is used in postmenopausal women to treat breast cancer that has spread to other parts of the body (metastatic breast cancer). It is usually used to treat cancer that needs estrogen, a female hormone, in order to grow (estrogen-receptor positive). Toremifene is a nonsteroidal antiestrogen that blocks the effects of estrogen in the breast tissue, thereby slowing or stopping the growth of cancer.
How should I take Toremifene?
Take this medication by mouth with or without food, usually once daily or as directed by your doctor. Dosage is based on your medical condition and response to therapy.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day.
Since this drug can be absorbed through the skin and lungs, women who are pregnant or who may become pregnant should not handle this medication or breathe the dust from the tablets.
Inform your doctor right away if your condition worsens (e.g., you get new breast lumps).
How do I store Toremifene?
Toremifene is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Toremifene in the bathroom or the freezer. There may be different brands of Toremifene that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.
You should not flush Toremifene down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.
Precautions & warnings
What should I know before using Toremifene?
Before taking toremifene, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: bone cancer (metastases), blood disorders (e.g., anemia, low platelets), diabetes, history of stroke or other blood clots (e.g., in the legs, lungs), heart disease (e.g., heart attack, irregular heartbeat), high blood pressure, liver disease, long periods of sitting or lying down (e.g., immobility such as being bedridden), uterus problems such as endometrial hyperplasia.
Notify your doctor beforehand if you will be having surgery or will be confined to a chair/bed for a long time (e.g., a long plane flight).
During pregnancy, toremifene should be used only when clearly needed. It may harm an unborn baby. If you become pregnant or think you may be pregnant, inform your doctor right away. Women of childbearing age should use reliable forms of non-hormonal birth control (such as condoms, diaphragm with spermicide) while using this medication. Discuss the use of birth control, the risks and benefits of this medication, and any other concerns about using this medication with your doctor.
It is not known if this medication passes into breast milk. Because of the possible risk to the infant, breast-feeding is not recommended while using this drug. Consult your doctor before breast-feeding.
Is it safe during pregnancy or breast-feeding?
There are no adequate studies in women for determining risk when using this Toremifene during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Toremifene. Toremifene is pregnancy risk category D according to the US Food and Drug Administration (FDA).
FDA pregnancy risk category reference below:
- A=No risk,
- B=No risk in some studies,
- C=There may be some risk,
- D=Positive evidence of risk,
What side effects can occur from Toremifene?
Hot flashes, sweating, nausea, vomiting, dry eyes, or dizziness may occur. If any of these side effects persist or worsen, notify your doctor promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if any of these unlikely but serious side effects occur: bone/joint/muscle pain or swelling, constipation, mental/mood changes (e.g., depression), trouble walking/clumsiness, swelling ankles/feet, unusual tiredness, vision changes (e.g., blurred vision, eye pain).
Toremifene may increase your risk of uterine cancer. Tell your doctor right away if you develop changes in menstrual period, unusual vaginal bleeding/discharge or pain/pressure below your “belly button” (navel).
Tell your doctor right away if any of these rare but very serious side effects occur: easy bleeding/bruising, signs of infection (e.g., fever, chills, persistent sore throat), symptoms of liver disease (such as nausea/vomiting that doesn’t stop, loss of appetite, stomach/abdominal pain, yellowing eyes/skin, dark urine).
Toremifene has rarely caused very serious (possibly fatal) blood clots in the lungs/legs, brain (stroke), and heart (heart attack). Seek immediate medical attention if you develop pain/swelling in the groin/calf, pain in the chest/jaw/left arm, confusion, fainting, severe sudden headache, slurred speech, sudden vision changes, shortness of breath, or weakness on one side of the body.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.
What drugs may interact with Toremifene?
Some products that may interact with this drug include: “blood thinners” (e.g., warfarin), estrogens, drugs affecting liver enzymes that remove toremifene from your body (e.g., certain anti-seizure medications such as carbamazepine/clonazepam/phenobarbital/phenytoin, rifampin).
Many drugs besides toremifene may affect the heart rhythm (QT prolongation), including amiodarone, granisetron, pimozide, procainamide, quinidine, sotalol, and macrolide antibiotics (such as erythromycin), among others.
Toremifene may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.
Does food or alcohol interact with Toremifene?
Toremifene may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.
This drug may make you dizzy. Alcohol or marijuana can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana.
What health conditions may interact with Toremifene?
Toremifene may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.
The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using this Toremifene.
What is the dose of Toremifene for an adult?
Usual Adult Dose for Breast Cancer
60 mg orally once daily
Duration of therapy: Treatment is generally continued until disease progression is observed.
Use: Treatment of metastatic breast cancer in postmenopausal women with estrogen-receptor positive or unknown tumors.
Renal Dose Adjustments
No adjustment listed in the manufacturer product information; however, dosage adjustment is unlikely to be necessary.
Liver Dose Adjustments
No adjustment listed in the manufacturer product information; however, hepatic impairment increases the half-life of this drug. Caution is recommended.
-This drug can be taken with or without food.
-Overdose: There is no specific antidote and treatment is symptomatic.
-Treatment with this drug is associated with modest reductions in both total serum cholesterol and low density lipoprotein in postmenopausal breast cancer patients.
-This drug displayed non-estrogen-dependent anti-tumor effects when used in some experimental cancers and/or in high-dose.
-Electrolytes, ECG (prior to and during treatment)
-Red blood cell, leukocyte, and platelet counts (during treatment)
-Complete blood counts, calcium levels, liver function tests (during treatment)
-Gynecological exam (prior to treatment and at least once a year during treatment)
-Talk to your healthcare provider about foods (ex: grapefruit) and medications (ex: certain antibiotics) that should be avoided during treatment with this drug.
What is the dose of Toremifene for a child?
The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.
How is Toremifene available?
Toremifene is available in the following dosage forms and strengths:
- Oral tablet.
What should I do in case of an emergency or overdose?
In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.
What should I do if I miss a dose?
If you miss a dose of Toremifene, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.
Hello Health Group does not provide medical advice, diagnosis or treatment.
Toremifene Dosage. https://www.drugs.com/dosage/toremifene.html. Accessed May 24, 2018.
Toremifene Tablet. https://www.webmd.com/drugs/2/drug-4557/toremifene-oral/details. Accessed May 24, 2018.
Review Date: November 8, 2018 | Last Modified: November 8, 2018