(A) postprandial single oral dose of trazodone hydrochloride prolonged-release tablets 75 mg; (B) postprandial single oral dose of trazodone hydrochloride prolonged-release tablets 150 mg; (C) fasting single oral dose of trazodone hydrochloride prolonged-release tablets 150 mg; (D) postprandial single oral trazodone hydrochloride tablets 150mg (50mg for 3 times) Time for drug administration is around 8:00am. Wash-out period is 7 days. Blood sampling will be performed before (0h) and after administration each dose group 0.5, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0, 12.0, 16.0, 24.0, 36.0, 48.0, 72.0h.