antipsychotic drug vs antipsychotic agent

antipsychotic drug and antipsychotic agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
antipsychotic drug	Yes	No	No	No
antipsychotic agent	Yes	No	No	No

As nouns, antipsychotic drug and antipsychotic agent are synonyms defined as:

antipsychotic drug and antipsychotic agent: tranquilizer used to treat psychotic conditions when a calming effect is desired

antipsychotic drug (noun)	antipsychotic agent (noun)
tranquilizer used to treat psychotic conditions when a calming effect is desired	tranquilizer used to treat psychotic conditions when a calming effect is desired