"sadly only lasted 5 days on effexor xr. the side effects from the 75mg dose was unlike anything i have experienced before. within 10 hours of the first dose i had severe anxiety - something i had never experienced before. within hours of second dose the extreme nausea came on. by day 3 i was pratically bed-ridden in cold sweats and feeling completely &quot;out of it&quot; . i persevered hoping the effects would begin to subside but by the 5th day i had severe nausea, couldn&#039;t get out of bed from feeling so sick, horrible tinnitus (ringing in the ears) and felt spaced out to the point that i began to wonder if i would ever feel &quot;normal&quot; again. advised by gp to cease immediately on hearing my side effects."