title: A cross-sectional study of prescribing patterns in chronic psychiatric patients living in sheltered housing facilities.
abstract: OBJECTIVE
  To analyze prescribing patterns of chronic psychiatric patients living in sheltered housing facilities, to identify the extent of polypharmacy and to estimate associated risks in this patient group.
  
  
  METHODS
  In a retrospective cross-sectional study the prescription data of 323 chronic psychiatric patients (average age 48.5 years) living in sheltered housing facilities in Rotterdam, The Netherlands, were analyzed. Prescription data were obtained from pharmacy-dispensing records.
  
  
  RESULTS
  Patients received on average 4.6 drugs (95% CI, 4.3-4.9). The most frequently prescribed drugs were as expected antipsychotics, benzodiazepines and antimuscarinic drugs. Overall 25% (n=81) of patients received two or more antipsychotic drugs. A high proportion of patients (38%, n=124) received one benzodiazepine, and 15% (n=50) received two or more benzodiazepines.
  
  
  CONCLUSIONS
  Patients in our study received a worryingly high number of drugs, and a quarter of the population was subject to antipsychotic polypharmacy. This increases the risk that drug-drug interactions, adverse drug reactions and noncompliance occur. Our study indicates potentially low quality of prescribing and shows the need for reviewing and special monitoring of pharmacotherapy in this patient group.
authors.affiliation: Department of Pharmacy, Division of Pharmacotherapy and Pharmaceutical Care, GUIDE, University of Groningen, The Netherlands.
authors.forename: S G
authors.initials: SG
authors.lastname: Schorr
authors.forename: A J M
authors.initials: AJ
authors.lastname: Loonen
authors.forename: J R B J
authors.initials: JR
authors.lastname: Brouwers
authors.forename: K
authors.initials: K
authors.lastname: Taxis
mesh_terms: D003430:Cross-Sectional Studies; D004359:Drug Therapy, Combination; D004363:Drug Utilization; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000188:drug therapy*; D008875:Middle Aged; D010818:Practice Patterns, Physicians'; D012112:Residential Facilities; D012189:Retrospective Studies