Final answer:
The classification of medication is based on the drug's action, so the statement is true. Medications are grouped into classes according to their pharmacological effects and therapeutic goals.
Step-by-step explanation:
The classification of a medication is indeed based on the action of the drug. So, the answer to the question would be true. Medications are classified according to their pharmacological effects on the body and the therapeutic outcomes they are designed to achieve. For instance, psychoactive drugs are grouped into classes like stimulants, depressants, anxiolytics, and others based on how they impact the central nervous system and alter mood, perception, or consciousness.