antispasmodic agent vs antispasmodic

antispasmodic agent and antispasmodic both are nouns.

Word	Noun	Adjective	Verb	Adverb
antispasmodic agent	Yes	No	No	No
antispasmodic	Yes	No	No	No

As nouns, antispasmodic agent and antispasmodic are synonyms defined as:

antispasmodic agent and antispasmodic: a drug used to relieve or prevent spasms (especially of the smooth muscles)

Other synonyms of antispasmodic agent include spasmolytic.

antispasmodic agent (noun)	antispasmodic (noun)
a drug used to relieve or prevent spasms (especially of the smooth muscles)	a drug used to relieve or prevent spasms (especially of the smooth muscles)