I take MS Contin, Percocet and Neurontin. I noticed after a couple of weeks my libido was rapidly decreasing. I asked my pain management doctor and she said these medications can actually lower testosterone levels. I am finding out this is true. When I only took Percocet and Neurontin, I saw no decrease in sex drive. I started to notice it (and so did my wife; obviously she is disappointed) after I started taking the morphine. Are there any safe, proven, legit OTC ways to increase testosterone levels? I know exercise helps, but with our conditions sometimes this is impossible. I need to do something, but the side effects of prescription testosterone-boosting meds scare the hell out of me. Anyone doing anything else that works for them?