sedative drug vs medication

sedative drug and medication both are nouns.

Word	Noun	Adjective	Verb	Adverb
sedative drug	Yes	No	No	No
medication	Yes	No	No	No

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

sedative drug: 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 sedative drug include drug of abuse, street drug, medicament, medicinal drug, medicine.

sedative drug (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