Review

Relative Efficacies of Gastric Proton Pump Inhibitors: Their Clinical and Pharmacological Basis
Wolfgang Kromer, Silke Horbach, Reinhold Lühmann

Department of Pharmacology, Byk Gulden, Konstanz, Germany

Address of Corresponding Author

Pharmacology 1999;59:57-77 (DOI: 10.1159/000028306)

  Key Words

• Gastric proton pump inhibitor
• H⁺/K⁺-ATPase inhibitor
• Lansoprazole
• Omeprazole
• Pantoprazole
• Rabeprazole

  Abstract

The present review will verify by intra-study rank orders, and their comparison between studies, that the different gastric proton pump inhibitors (PPIs) display similar dose-response relationships with similar potencies and efficacies on a milligram basis, i.e., at the same milligram doses. This is in line with their basic pharmacology which suggests that, primarily, the serum AUCs of the free pro-drugs and their chemical activation half lives at pH 1 relative to their serum elimination half lives determine the efficacies of PPIs. According to the literature, these drug characteristics are similar for all PPIs. Although PPIs have been introduced into the therapy of acute peptic ulcer disease at different daily, oral doses of 20 mg (omeprazole and rabeprazole), 30 mg (lansoprazole) and 40 mg (pantoprazole), the data suggest that the optimal dose of lansoprazole, omeprazole and pantoprazole, with respect to the acute treatment of peptic ulcers and moderate to severe gastroesophageal reflux disease (GERD), is about 30-40 mg daily. The data base of rabeprazole appears to be too small at present to make any definite statement. Lower daily doses of the PPIs of about 15-20 mg are sufficient in less severe cases of GERD and in maintenance therapy. It appears that different dose recommendations were based on different strategies to balance optimal drug dosage and safety, rather than on real differences in milligram-related efficacies.

  Author Contacts

Prof. W. Kromer, MD
Department of Pharmacology, Byk Gulden
Byk-Gulden-Strasse 2, D-78467 Konstanz (Germany)
Tel. +49 7531 84 2628, Fax +49 7531 84 9 2628
E-Mail Wolfgang.Kromer@byk.de

  Article Information

Number of Print Pages : 21
Number of Figures : 3, Number of Tables : 7, Number of References : 165