Tamiflu is the trade name for the generic name oseltamivir phosphate, and its side effects are nausea and vomiting, headache, and pain. Oseltamivir phosphate is the main ingredient of oseltamivir phosphate and is used clinically for the treatment of influenza A and B in adults and children 1 year of age and older, and the prophylaxis of influenza A and B in adults and adolescents 13 years of age and older. Side effects such as nausea and vomiting, bronchitis and dizziness may occur in some adult patients after taking it. While children may experience adverse reactions such as abdominal pain, vomiting, earache and conjunctivitis after taking it. Patients should discontinue oseltamivir and seek medical attention when symptoms such as bronchospasm, facial edema, leukocytosis and hematuria occur. Oseltamivir phosphate is contraindicated in persons who are hypersensitive to any of the components of oseltamivir phosphate. When taking Oseltamivir Phosphate, patients should take it under the advice of a doctor. Avoid blindly using the drug on your own to avoid aggravating the condition.