oseltamivir

Oseltamivir, an antiviral drug, slows the spread of influenza (flu) virus between cells in the body by stopping the virus from chemically cutting ties with its host cell. The drug is marketed under the trade name Tamiflu, and is taken orally in capsules or as a suspension.

Oseltamivir is a prodrug, a (relatively) inactive chemical which is converted into its active form by metabolic process after it is taken into the body.