Effect of delta9-tetrahydrocannabinol on the gastrointestinal tract of the rat

THC was neither ulcerogenic in 'semi-fasted' of 18-hour fasted rats following an oral dose of 100.0 mg/kg nor did it promote fecal blood loss (51Cr-labelled erythrocyte test) in the fasted rat after a dose of 200.0 mg/kg. On the contrary, 200.0 mg/kg of acetylsalicylic acid was ulcerogenic and caused fecal blood loss in the fasted rat. Neither substance caused mortalities at the doses tested.