Don't take too much medicine. 药不要吃得太多。

　　The cough will pass away without medicine. 这种咳嗽不服药也会好的。

　　但指不同种类时，可用作可数名词。如：

　　Keep those medicines out of reach of the children. 把那些药放在孩子够不着的地方。

　　She has taken a lot of different medicines, but none have cured her disease. 她已服用了许多药，但没有一种药能治好她的药。