mydriatic drug vs mydriatic

mydriatic drug and mydriatic both are nouns.

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

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

mydriatic drug and mydriatic: a drug that causes the pupil of the eye to dilate; used to aid eye examinations

mydriatic drug (noun)	mydriatic (noun)
a drug that causes the pupil of the eye to dilate; used to aid eye examinations	a drug that causes the pupil of the eye to dilate; used to aid eye examinations