Used primarily as a central nervous system stimulant, particularly in the management of barbiturate overdose. It acts as a convulsant and analeptic, helping to reverse the depressant effects of sedative drugs by stimulating respiratory and vasomotor centers in the brain. Historically employed to counteract deep sedation or coma induced by barbiturates, its use has declined due to the availability of safer antidotes and supportive care methods. Occasionally used in diagnostic settings to provoke seizures in electroencephalographic studies, though this application is rare and requires careful medical supervision.