depressant vs medication

depressant and medication both are nouns.

Word	Noun	Adjective	Verb	Adverb
depressant	Yes	Yes	No	No
medication	Yes	No	No	No

As nouns, medication is a hypernym of depressant; that is, medication is a word with a broader meaning than depressant:

depressant: a drug that reduces excitability and calms a person
medication: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of depressant include drug of abuse, street drug, medicament, medicinal drug, medicine.

depressant (noun)	medication (noun)
a drug that reduces excitability and calms a person	the act of treating with medicines or remedies
	(medicine) something that treats or prevents or alleviates the symptoms of disease

depressant (adjective)	medication (adjective)
capable of depressing physiological or psychological activity or response by a chemical agent