"i recently had an accident where a board hit the side of my ankle at a racing speed. about 20mph impact to my ankle, and a broken cuboid, 2 torn ligaments, and a broken ankle cap. i was prescribed (m37) vicodin. i take it 3 times a day and i live pain-free. but one side affect ive noticed is constipation. sounds funny but its true, taking vicodin on an empty stomach avoids this."