Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An antipsychotic drug, C21H25N3O2S, that acts as an antagonist of multiple neurotransmitters including serotonin and norepinephrine and is used in its fumarate form to treat schizophrenia.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A neuroleptic drug used in the treatment of psychosis.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[que-, origin unknown + t(h)ia(ze)pine, one of its chemical constituents (thi(o)– + az(o)– + ep(oxide) + –ine).]

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