I am also,going through withdrawls from the effexor xr,I think sometimes that I am going to die because of the horrible pain I have in my stomach,I feel numb in my arm,my stomach and my feet,the pain is unbearable,sometimes I wish that I could just sleep it off but the insomnia is keeping me from that,how long does this last,I have been on effexor for about 4 years,this is my third day and I finally couldn\'t take it and took a pill,even though I am still having the pain.