Studies on metabolism of trazodone. IV. Intestinal absorption in rats and rabbits.

The absorption rates are the same in rats and rabbits when [14C]trazodone HCl is injected into the duodenum of animals with pyloric vein cannulation. 2. The absorption of trazodone from the duodenum of rats is rapid in comparison with that of imipramine. 3. The residual food content of the rabbit stomach after fasting delay the overall rate of trazodone absorption by markedly decreasing transit rate from the stomach to the small intestine.