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methimazole (cont.)

What should I discuss with my healthcare provider before taking methimazole (Northyx, Tapazole)?

Do not use this medication if you are allergic to methimazole.

If you have any of these other conditions, you may need a dose adjustment or special tests to safely take this medication:

  • liver disease;
  • a blood cell disorder; or
  • a weak immune system.

FDA pregnancy category D. Do not use methimazole if you are pregnant. It could harm the unborn baby. Use effective birth control, and tell your doctor if you become pregnant during treatment.

Methimazole can pass into breast milk and may harm a nursing baby. Do not use methimazole if you are breast-feeding a baby.

How should I take methimazole (Northyx, Tapazole)?

Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

Take methimazole with a full glass of water.

Methimazole can be taken with or without food, but you should take it the same way each time.

Methimazole can increase your risk of bleeding. If you need to have any type of surgery, tell the surgeon ahead of time that you are using this medication.

Methimazole can lower blood cells that help your body fight infections. This can make it easier for you to bleed from an injury or get sick from being around others who are ill. Your blood may need to be tested often. Visit your doctor regularly.

It is important to use methimazole regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.

Keep using this medication even if you feel fine or have no symptoms of hyperthyroidism. You may need to keep taking methimazole long term to control your condition. Stopping the medication could cause your symptoms to return.

Store at room temperature away from moisture and heat.

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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