The question you should ask yourself is just how natural you want to be. How clean do you want to be? And in turn – how healthy do you want to be? By no means am I saying that moderate caffeine, alcohol, or even sugar use is a problem (for most). But if you’re on a drug, for a medical condition or not, realize that you’re almost always altering some physiological function in your body that you shouldn’t be messing around with. If you’re better with it – what’s wrong so you can’t do without it? Why can’t you wake up, sleep, think, or perform in everyway without it?
I must admit to some confusion about the whole area of drugs in sport. Sometimes I think that we should just hold up our hands and let the athletes do whatever they want. The one that always gets me is altitude training. Why is altitude training allowed yet blood doping / EPO isn't ? It has the same effect.
None of this is about health; sport - especially at the top levels - is not about health.