Oseltamivir Brands in the USA
Oseltamivir is available in the United States under the brand name Tamiflu, manufactured by Roche Pharmaceuticals, as well as generic formulations. 1, 2
Available Formulations
Brand Name Product (Tamiflu):
- Capsules: 30 mg, 45 mg, and 75 mg 2, 3, 4
- Oral Suspension: Powder for reconstitution to a final concentration of 6 mg/mL 2, 4
Generic Oseltamivir: Generic versions of oseltamivir became available in the United States and are therapeutically equivalent to the brand name Tamiflu 4, 5. These generic formulations are available in the same strengths and formulations as the brand name product.
Clinical Context
Oseltamivir remains the most commonly prescribed influenza antiviral in the United States, accounting for the vast majority of antiviral prescriptions during recent influenza seasons 5. Between 2016-2023, oseltamivir consistently represented the dominant share of influenza antiviral prescriptions among US insured individuals, with newer agents like baloxavir accounting for only 1.8%-9.2% of total prescriptions 5.
Important Prescribing Information
The commercially manufactured oral suspension is the preferred formulation for pediatric patients and adults who have difficulty swallowing capsules 2. If the commercial suspension is unavailable, pharmacies can compound a suspension from capsules using specific vehicles (Cherry Syrup, Ora-Sweet SF, or simple syrup) to achieve a final concentration of 6 mg/mL 2, 4.
During the 2022-2023 influenza season, there was a shortage of generic oseltamivir, prompting CDC recommendations to prioritize use for patients at greatest risk of influenza-related complications 6.