It is an anti inflammatory.I believe 10 picograms is the legal limit.Medina Spirit’s sample had 21 picograms.I don’t think Lasix would mask it, but it would dilute it

More importantly does Brad Cox enter Mandaloun in the Preakness since (albeit decided in the courts...) he might have a shot at the Triple Crown?

Betamethasone is a legal drug, class C in Kentucky.  That means it's okay in training but must not be used 14 days or less prior to a race.  It's a  (steroidal) pain med with anti-inflammatory properties...this is all according to varying sources.

Lasix masks drugs - that's a given.

Churchill has said the following:

In response to the positive result and "given the seriousness of the alleged offense," Churchill Downs Incorporated, the parent company of Churchill Downs, has suspended Baffert from entering any horses at Churchill Downs Racetrack.

"Failure to comply with the rules and medication protocols jeopardizes the safety of the horses and jockeys, the integrity of our sport and the reputation of the Kentucky Derby and all who participate. Churchill Downs will not tolerate it," it said in a statement.

Churchill Downs also said if the findings were upheld, Medina Spirit will be disqualified and Mandaloun will be declared the winner of last weekend's Kentucky Derby.

I suppose that would depend on how quickly the split sample comes back & how it comes back.

According to reports, the horse was twice over the legal limit.

Maybe it was the Deep (horse racing) State?  Sent in an agent who contaminated the horse!!!

Good question!

He said no this morning, that could change !

Short notice. Doubt it. When do the jocks get together and stop riding for Teflon Bob? If Medina gets DQ'd, Johnny V. loses out on his share of the winning payout.

.....and Rick Dutrow's still barred from training 13 years later???

After the Derby, Cox said his horses were both skipping the Preakness.  I think his hand's been forced, Mandaloun deserves a shot.  It'll ultimately be Juddmonte Farm who'll decide.  

I think Cox remarked that it is never actually good for a horse to wheel back in a competitive race 14 days later.... most trainers feel that way, but the prestige of the Preakness, coupled with the fabled Triple Crown gets in the way of better judgment