ArticlesWhat Is the Thyroid Gland?
Drug ReferencesPotassium Iodide, KI
Diseases and ConditionsHyperthyroidism
Pediatric Diseases and ConditionsHyperthyroidism (Graves' Disease)
Hyperthyroidism in Pregnancy
METHIMAZOLE (meth IM a zole) prevents the thyroid gland from producing too much thyroid hormone. It is used to treat a condition known as hyperthyroidism.
This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.
They need to know if you have any of these conditions:
bone marrow disease
an unusual or allergic reaction to methimazole, other medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. You can take this medicine with or without food. However, you should always take it the same way to make sure the effects are the same. Take your doses at regular intervals. Do not take your medicine more often than directed. Do not stop taking this medicine except on the advice of your doctor or health care professional.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed. While this drug may be prescribed for children for selected conditions, precautions do apply.
Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.
NOTE: This medicine is only for you. Do not share this medicine with others.
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Do not take this medicine with any of the following medications:
This medicine may also interact with the following medications:
certain medicines for high blood pressure like metoprolol and propranolol
This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.
Visit your doctor or health care professional for regular checks on your progress. Your thyroid hormone levels will need to be checked.
This medicine can reduce your resistance to infection. Contact your doctor or health care professional if you have any infection or injury. Avoid people who have colds, flu, bronchitis or other infectious disease. Do not have any vaccinations without asking your doctor or health care professional. Avoid people who have recently received oral polio vaccine.
Side effects that you should report to your doctor or health care professional as soon as possible:
black, tarry stools
fever, sore throat, hoarseness
numbness or tingling in the hands or feet
severe redness or itching of the skin, or dry cracked skin
swelling of the feet or legs
unusual bleeding or bruising, pinpoint red spots on the skin
unusual or sudden weight increase
unusually weak or tired
yellowing of skin or eyes
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
mild skin rash, itching
muscle aches and pains
This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Keep out of the reach of children.
Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.