Missed one day of effexor and I seriously regret it!! Experienced withdrawal mid day on missed day. Didn't know I missed it until next morning! Took it and felt OK until night time when the aches came back again! Night sweats, chills, eye and head pain. This morning I woke up with the withdrawal symptoms instead of going to bed with them! Took my meds and still have eye pain. This is day 3 of taking effexor again. Question, how many days of this will I have to suffer?? When will I feel normal again?!