薬 refers to medicine or medication used to treat illness. In Japanese, you 'drink' medicine (薬を飲む) even for pills.
COMMON EXPRESSIONS:
- 薬を飲む: to take medicine
- 薬が効く: the medicine works/takes effect
- 薬を処方する: to prescribe medicine
TYPES OF MEDICINE:
RELATED PLACES:
NOTE:
薬 can also mean 'drug' in illegal contexts, but 麻薬 is the more specific term for narcotics.