Tapazole (methimazole) is used to treat hyperthyroidism, also known as an overactive thyroid characterized by too much thyroid hormone production. Tapazole may also be used before thyroid surgery or radioactive iodine treatment. Tapazole may be prescribed for other uses as well. Consult your doctor for more information about treatment for hyperthyroidism and Tapazole uses.

Follow all the instructions on the packaging.
Always take Tapazole exactly as prescribed by your doctor.

• Dosage and frequency will vary
• Tapazole (methimazole) is typically taken every 8 hours
• Take Tapazole (methimazole) at regular intervals
• If you miss a dose, take the missed dose as soon as you remember.
• If you are close to your next dose, skip the missed dose and do not take extra medicine.

Inform your doctor if you:

• Have liver disease
• Have a blood cell disorder
• Have a weak immune system

Also tell your doctor if:

• You are undergoing surgery soon
• Are pregnant or breast-feeding

Common side effects of Tapazole include:

• Decreased sense of taste
• Hair loss
• Muscle pain
• Joint pain
• Skin discoloration
• Rash or itching
• Numbness or a tingling feeling
• Headache
• Dizziness or drowsiness
• Nausea, vomiting, or an upset stomach

Stop using Tapazole and call your doctor if:

• You experience sudden weakness, ill feeling, fever, sore throat, or chills
• You experience swollen gums, pain when swallowing, or mouth sores
• You develop pale skin or unusual bleeding
• Your glands around your neck or jaw start to swell
• You experience liver problems

What is Tapazole used for?

Tapazole (methimazole) is used to treat a thyroid condition called hyperthyroidism in which the thyroid produces too much thyroid hormone. Tapazole may be used for purposes not listed on the packaging and is often used before thyroid surgery or radioactive iodine treatment.

How does Tapazole work?

Tapazole (methimazole) works by stopping the thyroid gland from making excess thyroid hormone. Methimazole prevents the natural interaction between iodine and peroxidase, thus reducing the production of the thyroid hormones T4 and T3.