title: Can famotidine and omeprazole be combined on a once-daily basis?
abstract: OBJECTIVE
  Prompt and long-standing acid control following once-daily administration of antisecretory drugs is desirable. The objective of this study was to determine whether co-administration of a well-characterized H2-receptor antagonist, famotidine, can be combined with the proton-pump inhibitor omeprazole.
  
  
  METHODS
  Intragastric 24-h pH-metry was performed in healthy, Helicobacter pylori-negative volunteers on day 1 and after 8 days of daily administration of 20 mg omeprazole, 10 mg famotidine, or a combination of these in a three-way crossover design.
  
  
  RESULTS
  A combination of famotidine and omeprazole raised the gastric pH level to >4 in less than 1 h. The percentage of daytime with pH > 4 on day 1 was significantly higher with the combination of omeprazole and famotidine (median: 37%) than that with omeprazole alone (22%; p < 0.05). On day 8, daytime intragastric pH > 4 following treatment with omeprazole (median: 55%) or a combination of omeprazole and famotidine (61%) was superior (p < 0.05) to that with famotidine (21%). On day 1 treatment with both famotidine and the combination (famotidine and omeprazole) showed a significantly shorter time to reach a pH of 4 (medians: 93 and 63 min, respectively) compared with treatment with omeprazole alone (173 min; p < 0.05).
  
  
  CONCLUSIONS
  Compared with treatment with omeprazole alone, on day 1 famotidine and omeprazole in combination improved the duration of and time to reach intragastric pH > 4. With regard to duration with pH > 4, the combination therapy was superior to famotidine alone on day 8. The rapid acid control with an H2-receptor antagonist may be combined with the long-lasting antisecretory effect of a proton-pump inhibitor.
authors.affiliation: Department of Gastrosurgical Research, Sahlgrenska University Hospital, Gothenburg, Sweden. lars.fandriks@gastro.gu.se
authors.forename: Lars
authors.initials: L
authors.lastname: Fändriks
authors.forename: Hans
authors.initials: H
authors.lastname: Lönroth
authors.forename: Anders
authors.initials: A
authors.lastname: Pettersson
authors.forename: Nimish
authors.initials: N
authors.lastname: Vakil
mesh_terms: D000328:Adult; D018592:Cross-Over Studies; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D015738:Famotidine / Q000008:administration & dosage*; D006801:Humans; D009853:Omeprazole / Q000008:administration & dosage*
chemical_list: D015738:Famotidine; D009853:Omeprazole