I am suffering from the problem of erectile dysfunction. I dnt know what the problem is but earlier I got harder erections but from almost 5-6 months the erection became smaller I used to smoke menthol cigrate and many other types. I dnt drink. I only smoke but im not a chain smoker I smoke 3 cigrate daily so doctor can you please tell me how to increase the erection power for a longer time and how to overcome frm this problem is there any natural remedies my friend suggested me L-arginine .so is it safe to take that kind of supplement. What should I do now doctor. Please help me.