title: [Errors in prescriptions and their preparation at the outpatient pharmacy of a regional hospital].
abstract: BACKGROUND
  Adverse effects of medications are an important cause of morbidity and hospital admissions. Errors in prescription or preparation of medications by pharmacy personnel are a factor that may influence these occurrence of the adverse effects Aim: To assess the frequency and type of errors in prescriptions and in their preparation at the pharmacy unit of a regional public hospital.
  
  
  METHODS
  Prescriptions received by ambulatory patients and those being discharged from the hospital, were reviewed using a 12-item checklist. The preparation of such prescriptions at the pharmacy unit was also reviewed using a seven item checklist.
  
  
  RESULTS
  Seventy two percent of prescriptions had at least one error. The most common mistake was the impossibility of determining the concentration of the prescribed drug. Prescriptions for patients being discharged from the hospital had the higher number of errors. When a prescription had more than two drugs, the risk of error increased 2.4 times. Twenty four percent of prescription preparations had at least one error. The most common mistake was the labeling of drugs with incomplete medical indications. When a preparation included more than three drugs, the risk of preparation error increased 1.8 times.
  
  
  CONCLUSIONS
  Prescription and preparation of medication delivered to patients had frequent errors. The most important risk factor for errors was the number of drugs prescribed.
authors.affiliation: Servicio de Farmacia, Hospital Nueva Imperial, Nueva Imperial, Chile.
authors.forename: Carolina
authors.initials: C
authors.lastname: Alvarado A
authors.affiliation: Centro de Investigación y Gestión en Salud, Departamento de Salud Pública, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile.
authors.forename: Ximena
authors.initials: X
authors.lastname: Ossa G
authors.affiliation: Centro de Investigación y Gestión en Salud, Departamento de Salud Pública, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile.
authors.forename: Luis
authors.initials: L
authors.lastname: Bustos M
mesh_terms: D003430:Cross-Sectional Studies; D004339:Drug Compounding; D011307:Drug Prescriptions / Q000145:classification / Q000706:statistics & numerical data*; D006761:Hospitals; D006801:Humans; D057970:Inappropriate Prescribing / Q000009:adverse effects* / Q000145:classification / Q000706:statistics & numerical data*; D008508:Medication Errors / Q000009:adverse effects* / Q000145:classification / Q000706:statistics & numerical data*; D010045:Outpatients; D055553:Prescription Drugs / Q000009:adverse effects*; D017150:Public Sector
chemical_list: D055553:Prescription Drugs