My doctor prescribed Effexor for me three weeks ago for treatment of major depression and anxiety. During the first 2 weeks, I experienced many undesirable side affects such as nausea, loss of appetite, headaches, jitteriness, muscle jerks, chattering teeth, constipation, confusion, hyperness, difficulty having an orgasm, and hot flashes that seemed to last 30-60 min. The Effexor has lessened the anxiety and anxiety attacks fairly well, and has helped my mood a little. Now in my third week, most of the side effects have subsided except the muscle jerks, constipation, and difficulty/or inability to have an orgasm. I am a 20 year old female with a wonderful love life, and the last side effect mentioned is very disturbing to me. Should I expect these nagging side affects to dissappear also, or should I seek another medication? Thanks for your help!