"i take vicodin for menstrual cramps.  it is quite effective in eliminating the pain, but it does make me very sleepy and slightly out of touch with reality.  i found that caffeine counters this effect, but i haven&#039;t asked my doctor yet if it is okay to take caffeine with vicodin (i read the warning label twice and didn&#039;t find anything mentioned there).  i haven&#039;t noticed withdrawal symptoms, but i do use a minimum amount and am not prone to addiction in general."