Dear Ma am, Hi & welcome to HCM I appreciate your concern for safety Tamiflu. An antiviral drug used in the treatment and prevention of Influenza like H1N1, Tamiflu s common side effects include: Nausea, vomiting, diarrhea, headache, eye redness or discomfort, sleep problems, cough or other respiratory symptoms. Although less common however in some individuals it can also cause a severe allergic reaction resulting in hives, difficulty breathing, swelling of the face, lips, tongue, or throat; a red and blistering or peeling skin rash. Use of Azithromycin is not associated with such side effects. Hope to have answered your query.