Ok Arginine is for increased libido and increased semen, This helps due to taking propecia But Increased levels of Arginine causes outbreaks of cold sores. L-lysine is found to conteract the herpes virus, and help with muscle growth. My problem is I want to take the arginine to increase my depleted sex drive. But I dont want to casue cold sores. My question is combining these 2 amino acids cancel each other out?????? Or is it possible to get the effects desired on both?