Fareston

Last updated on RxList: 07/12/2021
Fareston Patient Information Including Side Effects

Brand Names: Fareston

Generic Name: toremifene

What is toremifene (Fareston)?

Toremifene is used in postmenopausal women to treat metastatic breast cancer (cancer that has spread to other parts of the body). Your doctor may test your tumor before prescribing toremifene.

Toremifene may also be used for purposes not listed in this medication guide.

What are the possible side effects of toremifene (Fareston)?

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Toremifene can cause a life-threatening heart rhythm disorder. Stop using toremifene and call your doctor at once if you have:

  • fast or pounding heartbeats;
  • fluttering in your chest;
  • sudden dizziness (like you might pass out);
  • shortness of breath; or
  • a seizure.

Also call your doctor at once if you have:

Common side effects may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about toremifene (Fareston)?

You should not use toremifene if you have a history of long QT syndrome, or low levels of potassium or magnesium in your blood.

Toremifene can cause a life-threatening heart rhythm disorder. Stop using toremifene and call your doctor at once if you have: fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness.

QUESTION

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Fareston Patient Information including How Should I Take

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What should I discuss with my healthcare provider before taking toremifene (Fareston)?

You should not use toremifene if you are allergic to it, or if you have:

  • long QT syndrome; or
  • an uncontrolled electrolyte imbalance (low levels of potassium or magnesium in your blood).

Tell your doctor if you have ever had:

Toremifene may increase your risk of developing a condition that can lead to uterine cancer. Talk to your doctor about your individual risk. Report any unusual vaginal bleeding right away.

This medicine is for use only in women who can no longer get pregnant. Toremifene can harm an unborn baby. Do not use if you are pregnant. Use effective birth control if you are not past menopause. Tell your doctor if you think you may be pregnant.

Toremifene can make hormonal birth control less effective, including birth control pills, injections, implants, skin patches, and vaginal rings. To prevent pregnancy while using toremifene, use a barrier form of birth control: condom, diaphragm, cervical cap, or contraceptive sponge.

You should not breastfeed while using toremifene.

How should I take toremifene (Fareston)?

Your doctor may perform a pelvic exam to make sure you do not have conditions that would prevent you from safely using toremifene.

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Take the medicine at the same time each day, with or without food.

You will need frequent medical tests.

Store at room temperature away from moisture, heat, and light.

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Fareston Patient Information including If I Miss a Dose

What happens if I miss a dose (Fareston)?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose (Fareston)?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include headache, dizziness and nausea.

What should I avoid while taking toremifene (Fareston)?

Grapefruit and grapefruit juice may interact with toremifene and lead to unwanted side effects. Avoid the use of grapefruit products while taking toremifene.

Ask your doctor or pharmacist before taking any over-the-counter medicines, vitamins, or herbal products. Avoid taking an herbal supplement containing St. John's wort.

What other drugs will affect toremifene (Fareston)?

Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.

Toremifene can cause a serious heart problem. Your risk may be higher if you also use certain other medicines for infections, asthma, heart problems, high blood pressure, depression, mental illness, cancer, malaria, or HIV.

Many drugs can affect toremifene. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here. Tell your doctor about all your current medicines and any medicine you start or stop using.

Where can I get more information (Fareston)?

Your pharmacist can provide more information about toremifene.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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