I had a doctor once prescribed me Effexor because I have a migraine headache’s. I put on 30 pounds within a couple months and I’m a very slight person. I never carry that kind of weight and it was really obvious something was wrong to me. The doctor that prescribed it said I was just aging, I was still in my 30s. Once I stopped taking the Effexor, the weight just melted off within the next few months.
I can’t address why the night sweats, I have them now but that is because I am really older now. I do know putting on weight made me depressed and I’m not a depressed person. I was able to just taper off Effexor without many side effects at all. I would just follow your doctor’s directions and get it out of your system. That particular classification of antidepressant has the weight gain has a side effect. I wish I could help more, good luck. Jennifer