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Gastric ulcer has shown association with changes in sex hormones, with impact exacerbated in males. Also, males are known to be more exposed to ulcer risk factors. This study investigates the effect of testosterone on indomethacin induced gastric ulcers in adult female rats. Eighteen female rats (225 ± 25 g body weight) were randomly assigned to 3 groups under standard laboratory condition. After acclimatization, animals fasted for 40 hrs but were given waterad libitum. Group A served as control while group B served as the ulcer control, in which ulcer was induced without treatment using indomethacin (40 mg/kg single orally dose). Group C was pretreated with testosterone (1 mg/kg IM) eight hours before ulcer induction. Eight hours after ulcer induction, animals were sacrificed and the stomach was harvested for analysis. Results showed a significant reduction in mucus content in groups C (0.79±0.11 g) and B (0.87±0.02 g) compared to A (1.11±0.03 g). Gastric mucus pH was significantly acidic in group B (4.40±0.55) compared to C (5.20±0.45) and A (5.80±0.45). There was a significantly higher ulcer index in group B (4.60±0.55 mm) compared to C (3.60±0.89 mm) and testosterone pretreatment resulted in a 21.74% ulcer inhibition. Although weak, the findings suggest that testosterone might protect the gastric mucosa against NSAIDs in females.

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