I started using Viagra, Cialis and Levitra at the age of 20. I personally never had any issues with it, except for red face and a stuffy nose (but I don't care about either of those). I am no doctor, so don't take my advice. I have found them to be massively helpful over the years. I would try the pill for the first time when I am alone, to see how I feel and how it works. That way when I am with a girl, I will be confident in how its going to work. Best of luck!
