Relenza (zanamivir) is a prescription drug used to treat or prevent influenza types A and B. The drug comes as a powder you inhale. It’s typically used once or twice daily. This article describes the ...

Relenza (zanamivir inhalation powder) can cause mild to serious side effects. More common side effects include sinus infection and fever. If Relenza side effects become difficult to tolerate, ask your ...

Relenza (zanamivir) is a brand-name inhalation powder. It’s prescribed for the flu in certain adults and children. Relenza has interactions with the nasal spray flu vaccine and certain health ...

As things stand, if an avian flu pandemic breaks out before a vaccine has been developed, the first line of defense is Roche's much-ballyhooed antiviral drug, Tamiflu. As a second choice, doctors will ...

Relenza (zanamivir) is a brand-name drug that’s prescribed for the flu in adults and some children. Relenza comes as a powder that you inhale once or twice per day. The dosage can vary depending on ...