As nouns the difference between atypical and paliperidone
is that atypical is (pharmacy) an atypical antipsychotic while paliperidone is 9-hydroxyrisperidone, an atypical antipsychotic drug.
As an adjective atypical
is not conforming to the normal type.
atypical
English
Adjective
(
en adjective)
Not conforming to the normal type.
Unusual or irregular.
Noun
(
en noun)
(pharmacy) An atypical antipsychotic.