oseltamivir, an antiviral drug. ▪ INDICATIONS: It is used to treat type A influenza. ▪ CONTRAINDICATIONS: Known hypersensitivity to this drug prohibits its use. ▪ ADVERSE EFFECTS: Adverse effects include fatigue, diarrhea, abdominal pain, and cough. Common side effects include headache, dizziness, insomnia, nausea, and vomiting.