Cortropine was a stimulant included in standard-issue Starfleet medkits.
Dr. McCoy utilized cortropine to overcome symptoms of weakness experienced by the landing party on Taurus II. (TAS: "The Lorelei Signal")
According to the Star Fleet Medical Reference Manual (p. 30), the stimulant cortropine, invented on Omicron Cephei VI, was similar to methamphetamine used on Earth. It was normally used to treat hyperkinesis in children and narkolepsy.