"i had appendicitis and the pain after i had surgery was horrible. i&#039;m the sort of person who hates taking medicine, but i gave in and took some. it worked very well. i&#039;m not sure if it was because i couldn&#039;t sleep because of the pain or that the vicodin made me drowsy, but i fell asleep around 30 minutes after i took it every time. a few months later when i had my wisdom teeth out, i also took vicodin and it let me get sleep then too. no other side effects."