Tamiflu is the brand name for the antiviral medication oseltamivir phosphate. It is prescribed for the treatment and prevention of influenza a and b infections. The drug works by inhibiting the neuraminidase enzyme on the surface of the virus. Neuraminidase is responsible for releasing new viral particles from infected cells. By blocking this enzyme, Tamiflu reduces the spread of the virus in the respiratory tract. This suppression shortens the duration of illness and lessens symptom severity when taken early.

Tamiflu is an oral antiviral medication used to treat and prevent influenza infection. It belongs to a class of drugs known as neuraminidase inhibitors. The active ingredient oseltamivir phosphate is converted in the body to the active metabolite oseltamivir carboxylate. This metabolite binds to the viral neuraminidase enzyme on the surface of influenza viruses. Binding blocks the enzyme ability to release new viral particles from infected cells. By preventing viral spread, the drug reduces the duration and severity of flu symptoms. The overall effect is a faster recovery and lower chance of complications when taken early in the infection.

Tamiflu may cause nausea and vomiting in some users. Headache and fatigue are also reported side effects. Some individuals experience stomach pain or diarrhea. Rarely the medication can lead to allergic reactions such as rash or itching. Neurological side effects including dizziness or confusion have been observed. Most side effects are mild and typically resolve without medical intervention.

Tamiflu may cause nausea in some users. Headache is another commonly reported symptom. Some people experience stomach pain or abdominal discomfort. Dizziness or lightheadedness can occur after taking the medication. Fatigue or unusual tiredness may be felt during treatment. Occasional skin rash or itching has been observed. Less frequently, changes in liver enzyme levels may be detected in blood tests. These effects are generally mild and often resolve without intervention.