Guys,
from reading through this it seems quite a lot of you are missing the point.
Liverpool have not done anything illegal. No doping.
What they have done is, have their players see a doctor, complaining of breathing problems or lung problems and then be diagnosed asthmatic. (This is obviously unethical, maybe the player is in on it, maybe not. Maybe the doctors are in on it, who knows?) Either way, Liverpool have an astonishing number of asthmatics at their club. And this asthmatic number only came about under Klopp. But I stress, it is nothing illegal. A player being diagnosed asthmatic. That's all it is. We could all be diagnosed asthmatic; certainly if we knew how to offer the appropriate symptoms of asthma to a doctor, or especially if the doctor is already primed to diagnose us as asthmatic.
Anyway, once diagnosed asthmatic, you are then prescribe a drug. This drug is allowed in professional sport, certainly in football. If you are diagnosed asthmatic, you can take this drug.
What Liverpool have then done is - again - this is all legal, unethical, yes, but all within the lines of legal - the players take their asthma pill an hour before kick-off. The player then takes a certain dose of caffeine, either through an edible or drink. Again, as you know, caffeine is legal. So are the pills, if you're asthmatic.
The cocktail of these pills and caffeine gives players extra physical energy over short bursts. Up to an hour of almost two times your natural physical energy (though it varies human body to human body depending on height and weight; though these doctors have the perfected doses set up per body type at the club so that the almost two times normal energy lasts for 45-minutes. Then they dose up on another 45-mins of caffeine at half-time. Again, all totally legal. Unethical, yes. But legal nonetheless.
Now, the human body can handle the asthma pills regularly and daily for many years. The human body can not, however, handle the cocktail of the caffeine with the pills for many years. They say this should be cycled every three years, otherwise there would be major risks of heart-failure. It'd be a bit like having a can of Redbull every day for three years. At some point your heart will go: 'what the feck?'
Anyway, just wanted to point it out as I see a lot of confusion over this issue.