How soon should I get Tamiflu if I feel sick?

How soon does the Tamiflu have to be administered after the first sign of flu-like symptoms? How effective is it?

It’s best if Tamiflu is taken within the first 48 hours of illness. Most older children and adults don’t need Tamiflu because they will be able to fight off the flu on their own, and after 48 hours they should be on their way to mounting an immune response. However, for people with immune system problems, Tamiflu can be beneficial even after 48 hours. That is something the patient has to discuss with their doctor.

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