Tamiflu has to be taken within 48 hours of symptom onset to be effective.
Tips
usage
Taiwanese brand name. 克 'overcome' + 流感 'flu' — literally 'flu-buster.' Mainland China usually transliterates oseltamivir as 达菲 (Dáfēi) or uses the generic 奥司他韦 (Àosītāwéi).