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.
Hydroxychloroquine, sold under the brand name Plaquenil among others, is a medication used for the prevention and treatment of certain types of malaria. Specifically it is used for chloroquine-sensitive malaria. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth. Common side effects include vomiting, headache, changes in vision and muscle weakness. Severe side effects may include allergic reactions. It appears to be safe in pregnancy bu