What Should I Tell My Healthcare Provider?Prior to taking methimazole, talk to your healthcare provider if you have:
- Liver disease, such as hepatitis, cirrhosis, or liver failure
- A bleeding disorder
- Any allergies, including to food, dyes, or preservatives.
Also, let your healthcare provider know if you are:
- Over the age of 65
- Pregnant or thinking of becoming pregnant (see Methimazole and Pregnancy)
- Breastfeeding (see Methimazole and Breastfeeding).
Make sure to tell your healthcare provider about all of the medicines you take, including prescription and nonprescription medications, vitamins, and herbal supplements.
(Click Precautions and Warnings With Methimazole to learn more, including information on who should not take the drug.)
How Does Methimazole Work?Methimazole works by inhibiting the production of hormones in the thyroid. It prevents the oxidation of iodine, an important step in the production of thyroid hormones. The medication does not affect the thyroid hormones that are already circulating in the bloodstream.
When and How to Take ItSome general considerations to keep in mind while taking this medication include the following:
- Methimazole comes in tablet form. It is usually taken three times daily.
- You can take it with or without food.
- For this medicine to work properly, it must be taken as prescribed.