Tamiflu 75mg capsules contain oseltamivir, an antiviral medication used to treat and prevent influenza A and B. Each package contains 10 hard capsules for oral use, manufactured by Roche Pharmaceuticals. This is a prescription medication that should only be taken under the direction of a healthcare provider. The capsules should be taken exactly as prescribed, typically for 5 days for treatment of flu symptoms or as directed for flu prevention. Common side effects may include nausea and vomiting. Store at room temperature away from moisture and heat. Seek immediate medical attention if you experience any severe allergic reactions or unusual symptoms.