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Table 1 Antipsychotic formulations and side-effect profiles

From: Management of constipation in patients with schizophrenia—a case study and review of literature

Name Route Likelihood of Induced Constipation Notes
Olanzapine IM ++ Constipation secondary to weight gain, metabolic issues
Clozapine PO +++ Constipation secondary Metabolic issues
Chlorpromazine PO ++ Anticholinergic, Atony of colon
Thioridazine PO +++ Anticholinergic
  1. ++ moderate/occurs frequently, +++ severe/occurs most of the time