How many 75mg oseltamivir capsules should be taken per day?
Dec 03, 2025
Source: Cainiu Health
Dr. Huang Yuhong
Introduction
Under normal circumstances, one to two 75 mg oseltamivir capsules should be taken daily, with the specific dosage determined according to whether the purpose is treatment or prevention. If any abnormalities occur, prompt medical consultation is recommended. Adults and adolescents aged 13 years and older usually take one capsule twice daily for five consecutive days. This regimen effectively inhibits influenza virus replication, alleviates symptoms such as fever and cough, and shortens the duration of illness.
Under normal circumstances, one to two 75mg oseltamivir capsules are taken daily, with the specific dosage determined according to whether the purpose is treatment or prevention. If any abnormalities occur, prompt medical consultation is recommended. Detailed information is as follows:
1. Influenza treatment: For adults and adolescents aged 13 years and older, the usual dose is one capsule twice daily for five consecutive days. This regimen effectively inhibits influenza virus replication, alleviates symptoms such as fever and cough, and shortens the duration of illness.
2. Influenza prevention: For adults and adolescents aged 13 years and older, one capsule daily for 7 to 10 consecutive days. This regimen is suitable for short-term prevention following close contact with an influenza patient or during peak flu season, but it cannot replace the long-term protection provided by influenza vaccination.
3. Special populations: Dosage for children should be adjusted based on body weight—30mg per dose for those under 15kg, 45mg for 15–23kg, 60mg for 23–40kg, and the adult dose for those over 40kg. Patients with renal impairment require dosage adjustment after medical evaluation.
Oseltamivir should be taken strictly as prescribed. Do not adjust the dose or discontinue the medication without medical advice. If adverse reactions such as nausea, vomiting, or headache occur, or if symptoms fail to improve, stop taking the drug immediately and seek medical attention.
