Your healthcare provider will tell you how to take Tamiflu. Take it exactly as your healthcare provider prescribes. Take it exactly as your healthcare provider prescribes. Q. Do You Have to Finish All Your Tamiflu? Terry Graedon The People's Pharmacy February 1, 2016 Default 24 Comments The focus on vaccines to prevent influenza sometimes overshadows antiviral drug treatment such as Tamiflu. If you are enamored by the idea of Tamiflu, then here are 5 things you should know from their report. 1. The manufacturer of the drug sponsored all the trials and the reviewers found evidence of. Always take & finish all your medicine as directed by your doctor! Tamiflu is an antiviral, but it can be used 2 ways; Taking one 75mg capsule ONCE a day will help prevent the flu, and taking one 75mg capsule TWICE a day will help treat the flu. Also tell your doctor if you have any condition causing swelling or disorder of the brain. Take Tamiflu for as many days as it has been prescribed for you even if you begin to feel better. Your symptoms may start to improve before the infection is completely treated. This means that if your doctor prescribes Tamiflu without giving you a flu test, it is less likely to help you get better. That’s because many patients who think they have the flu have a cold instead, and they will not benefit from Tamiflu. I have written this page to give average people a good idea of what Tamiflu is, how it works and what to look out for when somebody prescribes it for you. How to use Tamiflu. Read the Patient Information Leaflet if available from your pharmacist before you start taking this medicine. If you have any questions, consult your doctor or pharmacist. Whether you take Tamiflu or not is up to you and your doctor. No one should take any drug unnecessarily, Dr. Rehm points out. And the No one should take any drug unnecessarily, Dr. Rehm points out. Consult your healthcare provider if you have kidney disease, heart disease, respiratory disease or any other serious health condition. When to Take Tamiflu You may take Tamiflu to treat the flu or, in some cases, to prevent the flu.