Key takeaways
Tamiflu (oseltamivir) and Rapivab (peramivir) are both antiviral medications used to treat the flu, but they have some key differences. Tamiflu is taken orally, either as a capsule or a liquid, and must be started within 48 hours of flu symptoms. It can also be used to prevent the flu if you've been exposed. Rapivab, on the other hand, is given as a single infusion through a vein by a healthcare professional and is only used for treatment, not prevention. Rapivab must also be started within 48 hours of flu symptoms. Tamiflu is available in a lower-cost generic form, while Rapivab does not have a generic version and can be expensive. Tamiflu can be used in children as young as 2 weeks old and pregnant women, whereas Rapivab is typically used for people who can't take other antiviral medications and is approved for use in children 6 months and older. Both medications can cause serious allergic reactions and unusual behaviors, especially in children, but Rapivab is more likely to be used in a hospital or emergency room setting.
