It´s a difficult call. Moya has the game to win any slam (besides W)
Like he says, he is playing better tennis now than he played we he won Paris, but the rest of players improved as well.
Luck is an important factor at slams, draw, rain delays, injuries, muscular fatigue (specially at Oz and US because of the weather).
He has the game for a Grand Slam champion (thomas Johansson won Australia with half of Moya´s game), so luck must be with him along the way.
True, any prescription cold medicine has it.
Ephedrin is also used to open lungs and have oxigen flow faster to your blood (better recovery for muscles).
Soccer players get busted on that all the time.