Guess it helps to have family in medicine. No you just do not start Tamiflu. Go to urgent care and if you are DXed with Flu then you can start immediately. Tamiflu works the best when you start within 72 hrs of onset. This is the reason why we keep it on hand is because in the past it has run short of supply.It probably also depends on the doctor/insurance. Our doctor will provide nothing without an appointment and exam on the person who the medicine is prescribed for. Honestly, I would think that is best practice. There are things other than the flu going around. What if OPs child has an ear infection, sinusitis, bronchitis, step and they think it is the flu so they take the Tamiflu that was prescribed?