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Effect of amitriptyline (5, 10, 20 mg/kg, i.p.) on ulcer index; i.p. =intraperitoneally, Dex. 1=dexamethasone (1mg/kg); Values are presented as mean ± S.E.M of six rats in each group; ** P < 0.01, *** P< 0.001 compared to control, one-way ANOVA followed by Tukey test
