Hi, Thanks for your question. Tamiflu which is an antiviral drug and been approved for the treatment of swineflu. swine flu will be diagnosed by throat swab and should be taken for 7days. If you have influenza symptoms definetly you can repaet Tamiflu if not no need to take Tamiflu. Upper respiratory tract infections usally bacterial in origin most commonly but also viral also. I suggest you if you have influenza symptoms (fever, sore throat, fatigue, cough) then you take Tamiflu otherwise you need to take other antibiotics. I hope I was able to address your query. If you have any further questions, please do not hesitate to write to me. Wishing you all the best. Thanks