Zanamivir is a medication used to treat and prevent influenza caused by influenza A and B viruses...Wikipedia

Manufacturer's Website: Not available                                                                                                                           Average retail cost: $77/inhaler

Oseltamivir, sold under the brand name Tamiflu, is an antiviral medication used to treat and prevent influenza A and influenza B (flu)...Wikipedia

Manufacturer's Website: Tamiflu                                                                                                                      Average retail cost: $185/1 dose pk

Peramivir (trade name Rapivab) is an antiviral drug developed by BioCryst Pharmaceuticals for the treatment of influenza. Peramivir is a neuraminidase inhibitor, acting as a transition-state analogue inhibitor of influenza neuraminidase and thereby preventing new viruses from emerging from infected cells. It is approved for intravenous administration...Wikipedia

Manufacturer's Website: Rapavab                                                                                                                        Average retail cost: $1,000/3 vials