zanamivir, Relenza

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GENERIC NAME: zanamivir

BRAND NAME: Relenza

DRUG CLASS AND MECHANISM: Zanamivir is an inhaled drug that is used for treating and preventing influenza (the "flu"). Zanamivir decreases the spread of influenza A and B viruses, the viruses responsible for the flu. It does this by blocking the action of neuraminidase, an enzyme produced by the viruses that enables the viruses to spread from infected cells to healthy cells. By preventing the spread of virus from cell to cell, the symptoms and duration of influenza infection are reduced. On average, zanamivir reduces the duration of symptoms by one day if treatment is started within forty-eight hours after symptoms begin. The FDA approved zanamivir in July 1999.

GENERIC AVAILABLE: No

PRESCRIPTION: Yes

PREPARATIONS: Inhalation Powder: 5 mg per inhalation

STORAGE: Zanamivir should be stored at room temperature, 15 C to 30 C (59 F to 86 F)

PRESCRIBED FOR: Zanamivir is used for the treatment of infection with the influenza viruses, including swine flu (H1N1), in individuals seven years of age or older with symptoms for no longer than two days. It also is used for preventing influenza in adults and children five years of age and older. It is not recommended for individuals with underlying airways disease, and it is not a substitute for annual flu vaccination.

Medically Reviewed by a Doctor on 2/21/2014



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