For your Betadine (povidone-iodine) gargle, it is best to use room temperature or lukewarm water. Please avoid using hot water, as high temperatures can break down the active medicine and make the rinse less effective. Lukewarm water is also much gentler and more comforting on an already sore throat. Simply dilute the solution as directed on the package, gargle for about 30 seconds, and then spit it out without swallowing.
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