antihypertensive drug vs antihypertensive

antihypertensive drug and antihypertensive both are nouns.

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

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

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

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