Dobson, J., Whitley, R., Pocock, S., and Monto, A. (2015). Oseltamivir Treatment for Influenza in Adults: A Meta-Analysis of Randomised Controlled Trials. The Lancet. 385(9979):1729-1737.
The authors reviewed individual patient data from nine clinical trials comparing oseltamivir with a placebo as a treatment for seasonal influenza in adults. They found that oseltamivir reduced the time to symptom alleviation, the risk of lower respiratory tract complications, and risk of hospitalization, but increased the risk of nausea and vomiting.