title: Antidopaminergic drugs and acute pancreatitis: a population-based study.
abstract: OBJECTIVE
  To evaluate the suggested association between antidopaminergic drugs and acute pancreatitis.
  
  
  METHODS
  A large population-based nested case-control study.
  
  
  METHODS
  Swedish nationwide study from 2006 to 2008.
  
  
  METHODS
  The Patient Register was used to identify 6161 cases of acute pancreatitis. The 61 637 control subjects were randomly selected from the Register of the Total Population by frequency-based density sampling, matched for age, sex and calendar year.
  
  
  METHODS
  Exposure data were extracted from the Prescribed Drug Register. Antidopaminergic drugs were grouped into antiemetic/anxiolytic and other antipsychotics. Current use of antidopaminergic drugs was defined as filling a prescription 1-114 days before index date, while previous use was 115 days to 3.5 years before index date.
  
  
  METHODS
  Cases were defined as being diagnosed as having acute pancreatitis. ORs and 95% CIs were calculated using unconditional logistic regression.
  
  
  RESULTS
  The unadjusted OR indicated an increased risk of acute pancreatitis among current users of antiemetic/anxiolytics (OR 1.9, 95% CI 1.4 to 2.6), but not in the multivariable model adjusting for alcohol-related comorbidity, chronic obstructive lung disease, ischaemic heart disease, obesity, diabetes, opioid use, gallstone disease, educational level, marital status and number of concomitant medications (OR 0.9, 95% CI 0.6 to 1.2). Similarly, among current users of other antipsychotics, the unadjusted OR was 1.4 (95% CI 1.1 to 1.6), while the adjusted OR was 0.8 (95% CI 0.6 to 0.9). Results regarding previous use of antidopaminergic drugs followed a similar risk pattern as for current use.
  
  
  CONCLUSIONS
  The lack of association between antidopaminergic drugs and acute pancreatitis after adjustment for confounding factors in this study suggests that the previously reported positive associations might be explained by confounding.
authors.affiliation: Department of Neuroscience, Unit of Psychiatry, Uppsala University, Uppsala, Sweden.
authors.forename: Robert
authors.initials: R
authors.lastname: Bodén
authors.forename: Tomas S
authors.initials: TS
authors.lastname: Bexelius
authors.forename: Fredrik
authors.initials: F
authors.lastname: Mattsson
authors.forename: Jesper
authors.initials: J
authors.lastname: Lagergren
authors.forename: Mats
authors.initials: M
authors.lastname: Lindblad
authors.forename: Rickard
authors.initials: R
authors.lastname: Ljung