Iodine is available in dietary supplements, usually in the form of potassium iodide or sodium iodide. Many multivitamin-mineral supplements contain iodine. Dietary supplements of iodine-containing kelp (a seaweed) are also available. Iodine supplements might interact with anti-thyroid medications such as methimazole (TapazoleÂ®), used to treat hyperthyroidism. 2  Taking high doses of iodine with anti-thyroid medications could cause your body to produce too little thyroid hormone.
Five medications are commonly used by physicians licensed in United States to prevent malaria: mefloquine, doxycycline, atovaquone/proguanil, chloroquine, and under special circumstances, primaquine. 1 Mefloquine, chloroquine, and doxycycline work only on the erythrocytic stage of malaria.
If you need to take a medicine for indigestion (such as an antacid), do not take it during the two hours before you take proguanil with atovaquone, or during the two hours after you take it. This is because some magnesium-containing antacids interfere with the way one of the medicines (proguanil) is absorbed by your body, making it less effective.