I have had success with L-Arginine, The one by "Now Sports" its pure with no other ingredients I dont work for them nor am I an affiliate either, this is just my personal experience, my cardiologist approve of it also. so consult your physician
Arginine, Horny Goat Weed, Cayenne
Erectile Dyfuction: The amino acid Arginine with Horny Goat Weed works. Start out with 2 1000 mg of Arginine and 2 500 mg of HGW daily. Work up to more if necessary. Kick in a little Cayenne for good measures.