Oseltamivir phosphate is a prescription medication used to treat and prevent influenza (flu) in persons aged 2 weeks and up who have had flu symptoms for no more than two days. It is available as capsules containing 75 mg of oseltamivir for oral use. The medicine works by suppressing the function of neuraminidase, an enzyme required for the influenza virus to proliferate and multiply. Oseltamivir phosphate is helpful in lowering the length and intensity of flu symptoms such as fever, cough, and sore throat, as well as preventing the flu in those who are at risk of developing it.

Oseltamivir Phosphate is not suggested for persons with specific medical problems, including as end-stage renal disease (ESRD) who are not on dialysis, or those with impaired immune systems. It is also ineffective in those who begin therapy two days after acquiring flu symptoms. The drug should be taken exactly as prescribed by a healthcare practitioner, and it is critical to finish the whole course of therapy even if symptoms improve. Oseltamivir phosphate can produce major side effects such as skin and allergic responses, as well as behavioral problems. Any adverse effects should be reported to a healthcare practitioner promptly.