How long do I need to take this medication?

这种药需要服用多长时间？

同一单元的其他句子

• I've had a cough for a week, and it gets worse at night.我已经咳嗽了一个星期，而且晚上更加严重。
• I would like to have a comprehensive health checkup.我想做一个全面的身体检查。
• The doctor recommended that I get a chest X-ray.医生建议我做一次胸部X光检查。
• Should this prescription medicine be taken on an empty stomach?这个处方药需要空腹服用吗？
• My symptoms have persisted for two weeks without improvement.我的症状已经持续了两周没有好转。