Not to take away from their achievement, but do we know if there were drugs involved?

Not for takeoff. Apollo astronauts used barbituates to help sleep, and scopolamine with dextroamphetamine during re-entry. Unsurprisingly the average HR during re-entry was rather higher than at launch! (source: https://space.stackexchange.com/a/31987 )

Gemini would likely have been similar, save for using Cyclizine during re-entry rather than scopolamine/dextroamphetamine.

Detailed info about the Apollo medkit: http://heroicrelics.org/info/csm/apollo-medical-kit.html

Less-detailed history of NASA medkits, mentioning Gemini: https://www.spacesafetymagazine.com/spaceflight/space-medici...