ABSTRACT
Peptic ulcer is a state that result from imbalance between the corrosive effect of acid and pepsin and mucosal defense mechanism in the stomach and may be correlated with antioxidant agents. Forty two healthy albino male rats weighing [180-200] gram were used in this study. The animals were allocated to six groups. Each group was given one of the following drugs: Lansoprazole, Zinc sulfate, chromium, Beta-carotene and distilled water as control. After 5 days of treatment with these agents, ethanol 95% was administered orally after one hour of the last dose of these agents. Animals were sacrificed after one hour later .The main parameters used in this study were ulcer preventive index, free radicals, changing of serum electrolytes. Ethanol in high concentrations was found to be highly ulcerogenic agent with ratio of 100% when administered orally in rat .The preventive index of these drugs equal 97.35, 59.99 and 87.78 for Zinc sulfate, chromium and Beta-carotene respectively in comparing with lansoprazole 99.09. All the tested agents produced highly significant changes in free radicals of the gastric tissue decreasing MDA levels and increasing GSH levels and many of serum electrolytes were significantly changed by the tested drugs. Zinc sulfate, chromium and Beta-carotene proved to have gastroprotective activity against ethanol induced gastric ulcer and the possibility to be used for patients with peptic ulcer