Effexor (teva venlafaxine) used to treat depression, anxiety and panic attacks is supposed to decrease sexual desire, but side effects can include anxiety, and bizarre behaviors just to name a few. Your friend should check back in with the Dr. to give an update on how she is responding to her meds so that adjustments can be made if needed. The medication usually builds up an adequate level in the body to reach therapeutic status after about 4 weeks. Hope this helps! She needs to keep approaching her Dr. until she finds the tx. she needs. You are such a good friend to go to all the trouble to find out more on how to help her. She is very lucky!!!!