If the statistics are correct and EIPH occurs in 90% of racehorses it should definitely be allowed; who would want to risk a bleeding attack if it's preventable? Once it happens the horse rarely returns to its previous ability even with treatment ( I know there are exceptions) but generally not. Wasn't this the problem with I'm Themightyquinn last November?.... scar tissue was discovered. Fortunately the horse doesn't appear to have any side effects at the moment and hopefully wont. The fact that it could be a possible masking agent is basically another matter.