"i&#039;m only 18 years old and i have been put on some of the worst drugs ever. from zoloft, concerta to vevance to prozac and now effexor. effexor was actually a little bit worse from prozac with me. both of these drugs i quit having regular periods. but, especially with effexor i had cramps almost the whole month rather than the week of my period. i craved food less i found it difficulty to stay hydrated. i have nightmares almost every night. i&#039;ve been on drugs since i was 13. effexor makes everything difficult to remember. i&#039;ve attempted to go cold turkey it does not work. the dizzy spells, muscle spasms, stomach cramps increase. when they wear off i find myself having more panic attacks and depressing thoughts. i&#039;m only on the 75 mg."