amobarbital: a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant
truth serum: an intravenous anesthetic drug that has a hypnotic effect; induces relaxation and weakens inhibitions; is believed to induce people to talk freely
tarsus: the part of the foot of a vertebrate between the metatarsus and the leg; in human beings the bones of the ankle and heel collectively