well .. as he is banned i'd say it's finalized
and of course you can fail test with over the counter medicine .. but for those you need subscription and you must notify the governing body..
giving Spain as an example isn't the best idea when it comes to doping
http://en.wikipedia.org/wiki/Eufemiano_Fuentes
http://en.wikipedia.org/wiki/Operaci%C3%B3n_Galgo