The flu, or Influenza A or B virus could cause prolonged symptoms of fever, chills, muscle ache, headache and other frustrating symptoms. The drug Tamiflu has traditionally been recommended if patients’ presents with symptoms onset of the flu.

However, the Centers for Disease Control and Prevention (CDC) states that treatment for Fly can now be considered for any previously healthy, symptomatic outpatient,” and also can be initiated beyond the FDA-approved two-day timeframe. Thus, Tamiflu could be considered for all at anytime frame.

Ref: Centers for Disease Control and Prevention (CDC)