AsHelicobacter pyloriplays an important role in the aetiopathogenesis of peptic ulcer, therapeutic strategies aimed at maintaining long term remission have shifted from the control of intragastric pH to targetingH. pylori. According to recent international guidelines the clinical goals − rapid ulcer healing and prevention of relapse − can be best accomplished by combination therapy consisting of an antisecretory drug (proton pump inhibitor or ranitidine) and 2 antimicrobial agents (preferable amoxicillin, clarithromycin or metronidazole).When applying such multidrug regimens, possible synergy between the agents suggests that pharmacokinetic considerations might help to improveH. pylorieradication rates, which should be above 85 to 90% on an intention-to-treat basis. The present review summarises the pharmacokinetic properties and interaction potential of all drugs presently used in the variousH. pylorieradication regimens, with emphasis on particular patient populations such as the elderly and those with renal impairment. The drugs considered are omeprazole, lansoprazole, pantoprazole, rabeprazole, ranitidine and ranitidine bismutrex, bismuth salts, amoxicillin, clarithromycin, azithromycin, roxithromycin, metronidazole, tinidazole and tetracycline.When addressing the clinically important questions of the efficacy, safety and costs of the recommended regimens, the impact of drug disposition onH. pylorieradication should not be neglected.