The most common side effects of Tamiflu are nausea and vomiting. Usually, nausea and vomiting are not severe and happen in the first 2 days of treatment. Taking Tamiflu with food may lessen the chance of getting these side effects.

What happens if you take Tamiflu on an empty stomach?

This medicine should be taken for at least 10 days. You may take this medicine with meals or on an empty stomach. Taking oseltamivir with food may lessen the possibility of stomach upset.

What are side effects of Tamiflu?

• Abdominal or stomach cramps or tenderness.
• arm, back, or jaw pain.
• bloating.
• chest pain or discomfort.
• diarrhea, watery and severe, which may also be bloody.
• drooling.
• facial swelling.
• fast or irregular heartbeat.