levallorphan: drug (trade name Lorfan) that is related to morphine but that counteracts the respiratory depression produced by morphine poisoning but without affecting its analgesic effects
substance: a particular kind or species of matter with uniform properties
pinesap: fleshy tawny or reddish saprophytic herb resembling the Indian pipe and growing in woodland humus of eastern North America; in some classifications placed in a separate genus Hypopitys