We will no doubt have to wait several months before we know something close to the truth about Maria Sharapova's substances, and whether she is deemed to have made an innocent error, whether and for how long she is banned, and whether risk averse companies who have severed their connections with her at the first hint of trouble decide to hitch up with her again. But from the outside, whatever the facts of this particuar case, it seems to point to many of the illogicalities of drug rules in sport.
The story appears to be that Sharapova has been taking this drug, meldonium or mildronate, on and off for 10 years, for medical reasons (even though most doctors claim that it is only prescribed for short term use) and had failed to notice that it had recently been placed on the banned list of performing enhancing substances. Whatever the truth, the general picture it conjures up is fairly clear.
In any sport where a lot of money is up for grabs or where huge national prestige is at stake (so I mean tennis rather than tiddly winks) there is a huge incentive to win. I rather doubt that they is any money making or big prestige sport with an entirely 'clean culture'. There are no doubt many clean individuals, but the practice of cheating tends to follow the money and the fame. Where winning brings big rewards, then a few will do or take anything they can to win, while hoping to avoid getting caught (though that is getting harder); many more will take any steps that remain on the right side of legality, from weird diets to pharmaceuticals that haven't been banned (yet).
I find myself wondering about the logic of all this.