Drugs: Legal, Not legal and ????

The other story on 60 Minutes was about "Adult ADD." When Pharmicuitical comapies are allowed to promote the chemical solution for such gerneral and vauge problems in life, then why is it so shocking that athletes would want to improve their performance through chemistry. Can you really then argue that it is immoral to use marijauna or anything else they beleive makes their life easier. Is there really a difference between doctors/pharmacists/pharmicuitical companies and street drug dealers other than that the former group is licensed?