i would never recommend taking 1 supplement for this... you need to take several for best synergy and that is very expensive.. you can end up spending $600+ easy
thankfully hcgenerate exists and hcgenerate ES is even stronger. both are sold at n2bm
Natural herbal testosterone boosters work best when stacked together. Mucuna pruriens by themselves will produce good results but you will get the best results by using a multi ingredient product like @stevesmi suggested.
What exactly are you looking to do? The title of the thread says sex drive but your post says erections. Those are very different things. Are you having issues with both?