Tell your doctor about all your current medicines and any you start or stop using, especially:
digoxin, digitalis, theophylline;
a blood thinner--warfarin, Coumadin, Jantoven; or
a beta blocker--atenolol, carvedilol, labetalol, metoprolol, nadolol, propranolol, sotalol, and others.
This list is not complete. Other drugs may interact with methimazole, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
 Methimazole drug interactions (more detail)
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