antihypertensive vs antihypertensive drug

antihypertensive and antihypertensive drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
antihypertensive	Yes	No	No	No
antihypertensive drug	Yes	No	No	No

As nouns, antihypertensive and antihypertensive drug are synonyms defined as:

antihypertensive and antihypertensive drug: a drug that reduces high blood pressure

antihypertensive (noun)	antihypertensive drug (noun)
a drug that reduces high blood pressure	a drug that reduces high blood pressure