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Author: Admin | 2025-04-28
What is methimazole used for?Methimazole is commonly used to treat people with Graves' disease or toxic multinodular goiter who have an overactive thyroid (hyperthyroidism).Methimazole can also be used to help reduce symptoms of an overactive thyroid before having surgery to remove the thyroid or radioactive iodine therapy.Methimazole may also be used for other conditions as determined by your healthcare provider.How does methimazole work (mechanism of action)?Methimazole works by blocking your body from making too much thyroid hormone.How is methimazole supplied (dosage forms)?Methimazole is available in the following dosage forms that are taken by mouth.5 mg oral tablets10 mg oral tabletsHow should I store methimazole?Methimazole should be stored at room temperature, between 68 F to 77 F (20 C to 25 C). It can be exposed to temperatures between 59 F to 86 F (15 C to 30 C) for shorter periods of time, such as when transporting it. Store in a cool, dry place. Protect from light. Side Effects What are the most common side effects of methimazole?The most common side effects of methimazole are listed below. Tell your healthcare provider if you have any of these side effects that bother you.Skin rash, hives, or discoloration Nausea or vomitingUpper stomach pain or tendernessJoint, muscle, or nerve painLoss of tasteHair lossHeadache or dizzinessItchingSleepinessFluid retention (edema)Skin or the whites of your eyes turning yellowish in color (also called jaundice)Enlarged salivary glands or lymph nodesThere may be other side effects of methimazole that are not listed here. Contact your healthcare provider if you think you are having a side effect of a medicine. In the U.S., you can report side effects to the FDA at www.fda.gov/medwatch or by calling 800-FDA-1088. In Canada, you can report side effects to Health Canada at www.health.gc.ca/medeffect or by calling 866-234-2345.What are the serious side effects of methimazole?While less common, the most serious side effects of methimazole are described below, along with what to do if they happen.Severe Allergic Reactions. Methimazole may cause allergic reactions, which can be serious. Stop taking methimazole and get help right away if you have any of the following symptoms of a serious allergic reaction.Breathing problems or wheezingRacing heartFever or general ill feelingSwollen lymph nodesSwelling of the face, lips, mouth, tongue, or throatTrouble swallowing or throat tightnessItching, skin rash, or pale red bumps on the skin called hivesNausea or vomitingDizziness, feeling lightheaded, or faintingStomach crampsJoint painBlood Disorders. Methimazole can cause blood disorders, such
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