title: Effects of pantoprazole on endocrine function in healthy male volunteers.
abstract: METHODS
  In a randomized, double-blind, two-period crossover study, pantoprazole 40 mg or placebo were given orally to 12 male volunteers for 2 weeks each. There was a wash-out period of at least 1 week between the two treatment periods. The effects of pantoprazole or placebo on cortisol and testosterone (primary criteria), and tri-iodothyronine, thyroxine, thyroid-stimulating hormone, thyronine-binding protein, parathyroid hormone, insulin, glucagon, renin, aldosterone, follicle-stimulating hormone, luteotrophic hormone, prolactin and somatotrophic hormone were compared. In addition, intragastric 24-h pH, 24-h H(+)-activity, and volume of nocturnal gastric juice were determined by gastric aspiration technique.
  
  
  RESULTS
  Pantoprazole did not influence plasma levels of testosterone, circadian cortisol concentrations or plasma cortisol levels after exogenous adrenocorticotropic hormone stimulation, as compared to placebo (P > 0.05, Koch's test). Furthermore, there were no clinically relevant changes with any of the other endocrine parameters. Pantoprazole significantly increased the median 24-h pH (group median 4.3 vs. 1.8; P < 0.001) and decreased 24-h H(+)-activity (4.0 vs. 22.6 mmol/L; P < 0.001). The volume of nocturnal gastric juice did not significantly differ between the two treatments. Pantoprazole was well tolerated and the frequency of adverse events was similar to placebo. No drug-related changes in laboratory values were observed.
  
  
  CONCLUSIONS
  Pantoprazole did not influence endocrine function in healthy male volunteers during short-term treatment.
authors.affiliation: Krankenhaus Bethanien, Hamburg, Germany.
authors.forename: H G
authors.initials: HG
authors.lastname: Dammann
authors.forename: T
authors.initials: T
authors.lastname: Bethke
authors.forename: F
authors.initials: F
authors.lastname: Burkhardt
authors.forename: N
authors.initials: N
authors.lastname: Wolf
authors.forename: H
authors.initials: H
authors.lastname: Khalil
authors.forename: R
authors.initials: R
authors.lastname: Luehmann
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000328:Adult; D001562:Benzimidazoles / Q000009:adverse effects / Q000494:pharmacology*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D004702:Endocrine Glands / Q000187:drug effects*; D005750:Gastric Juice / Q000187:drug effects; D005753:Gastric Mucosa / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D006863:Hydrogen-Ion Concentration; D008297:Male; D009853:Omeprazole / Q000031:analogs & derivatives; D000077402:Pantoprazole; D054328:Proton Pump Inhibitors; D012636:Secretory Rate / Q000187:drug effects; D013454:Sulfoxides / Q000009:adverse effects / Q000494:pharmacology*; D013739:Testosterone / Q000097:blood
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D001562:Benzimidazoles; D054328:Proton Pump Inhibitors; D013454:Sulfoxides; D013739:Testosterone; D000077402:Pantoprazole; D009853:Omeprazole; D006854:Hydrocortisone