What to take to increase the libido when I am on Effexor? Can I take Stimul Energex?

It is pertinent at this time to question the use of Effexor. It is sometimes indicated to try to reduce the medication in order to see if the mood disorders will worsen. This is even more pertinent considering the fact that the natural product you mention in your question is unlikely to improve your libido. I prefer a "medication cascade" approach, that is, I avoid using a medication to counteract the side effects of another medication. I also refer you to an online sexologist service, free of charge, which will allow you to talk to specialists in the field. Does this answer your question well?