What unusual performance enhancer was Thomas Hicks given during the St. Louis 1904 Olympic Marathon?

He received several doses of strychnine. WADA would certainly not approve these days! The Wikipedia article referenced below describes the race as "bizarre" with poor organisation and officiating. The race was won by American Frederick Lorz, only to be disqualified when it was found that he had hitched a car ride for part of the distance. Thomas Hicks was the actual winner. His trainers had administered brandy, raw eggs and strychnine (a stimulant and also a rat poison) to him. Unsurprisingly Hicks was on the point of collapse and hallucinating when he finished the race.

https://en.wikipedia.org/wiki/Athletics_at_the_1904_Summer_Olympics_%E2%80%93_Men%27s_marathon