Bromocriptine was used by athletes to improve reaction time and performance, particularly in starting blocks.

“and the athletes that were taking it don't ask me how I know this but I could tell you offline — and I'm not one of these athletes nor was I supplying the Brom crype where using it because uh they were sprinters and it turns out that a lot of the sprint races are won by being first out the blocks there are other factors as well but that reaction time you know hundreds of milliseconds are the difference between Podium and no Podium — and bromocryptine was one of the drugs used”