R group: The subjects will receive 50mg trazodone hydrochloride tablet 50mg for 3 times after receiving standard light breakfast at 6:00am, standard meal at 14:00 and 22:00. Blood sampling will be conducted on day 1, 5, 6, 7 before first administration in this period, blood sampling will be conducted at 0.5, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0 (before the second time administration), 8.5, 9.0, 9.5, 10.0, 11.0, 12.0, 14.0, 16.0 (before the third time administration), 16.5, 17.0, 17.5, 18.0, 19.0, 20.0, 22.0, 24.0, 36.0, 48.0, 72.0h after administration on day 7.