Side effects of oseltamivir can be managed by keeping the diet light and changing the time of taking the medicine. In severe cases the medication needs to be stopped and medical attention sought. Oseltamivir is a medication used to treat the influenza virus. Side effects usually include nausea, vomiting, abdominal pain, and diarrhea. 1. Maintain a light diet: Nausea and vomiting may occur after taking oseltamivir, due to gastric reflux, bile reflux and other conditions, for the stomach, esophagus, throat have caused some damage. You should pay attention to keep the diet light, you can eat some thin porridge, noodles, green vegetables, fruits and so on, avoid eating spicy and stimulating food, otherwise it will aggravate the side effects. 2. Change the time of taking the medicine: because oseltamivir has gastric irritation, so taking the medicine on an empty stomach has a greater possibility of nausea, vomiting, abdominal pain, diarrhea, so it is recommended to change the time of taking the medicine, preferably during meals, after meals. In addition, if behavioral and sensory abnormalities, hallucinations, drowsiness, impaired consciousness, seizures, or psychosis occur during administration of oseltamivir, as well as the occurrence of severe skin allergic reactions, including toxic epidermal necrolysis lysis, Stevens-Johnson syndrome, and erythema multiforme, the medication should be discontinued and medical attention should be sought immediately.