复数是medicines，例如：

1. Make sure you understand exactly how to take your medicines before you leave the pharmacy.在离开药房之前，一定要弄明白自己的药该怎么吃。

2.Are you taking any other medicines whether on prescription or bought over the counter 你在服用其他什么处方药或非处方药吗？3.Canada is now a substantial net importer of medicines.加拿大现在是一个药物净进口大国。