title: Chronic oral administration of lansoprazole does not affect the hypothalamic pituitary gonadal axis in healthy young men.
abstract: OBJECTIVE
  To assess the effects of chronic oral administration of standard doses of lansoprazole on the luteinizing hormone pulsatile pattern and on follicle stimulating hormone (FSH) and testosterone levels in young men.
  
  
  METHODS
  Eleven healthy volunteers were studied on three separate occasions, before and after two 3-week periods of treatment with lansoprazole (30 mg every morning) or a placebo, according to a randomized, double-blind, double-dummy, cross-over design. On each study day, blood samples were taken every 15 min for 8 h. The pulsatile pattern of luteinizing hormone, mean concentrations of FSH and total testosterone plasma levels were determined for each patient using specific radioimmunoassays.
  
  
  RESULTS
  Lansoprazole did not significantly affect mean plasma levels, the pulsatile pattern of luteinizing hormone, or mean plasma concentrations of FSH and testosterone compared with the placebo.
  
  
  CONCLUSIONS
  This study indicates that chronic oral administration of standard doses of lansoprazole does not affect the concentrations of gonadal hypothalamic pituitary or sex steroid hormones.
authors.affiliation: Institute of Clinical Pharmacology and Therapy, St Orsola Hospital, University of Bologna, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Gaetani
authors.forename: R
authors.initials: R
authors.lastname: De Giorgio
authors.forename: P
authors.initials: P
authors.lastname: Buratti
authors.forename: R
authors.initials: R
authors.lastname: Pasquali
authors.forename: M
authors.initials: M
authors.lastname: Capelli
authors.forename: V
authors.initials: V
authors.lastname: Stanghellini
authors.forename: R
authors.initials: R
authors.lastname: Corinaldesi
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000284:Administration, Oral; D000328:Adult; D000897:Anti-Ulcer Agents / Q000494:pharmacology*; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005640:Follicle Stimulating Hormone / Q000097:blood; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects*; D064747:Lansoprazole; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D009853:Omeprazole / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D011863:Radioimmunoassay; D013737:Testis / Q000187:drug effects*; D013739:Testosterone / Q000097:blood
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000897:Anti-Ulcer Agents; D064747:Lansoprazole; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D009853:Omeprazole