1) Metrazol 2) Pentamethylenetetrazol 
C6H10N4;a powerful stimulant to the central nervous system; has been used to cause generalised convulsion in the shock treatment of emotional states and as a respiratory stimulant; mainly used in experimental studies of seizure mechanisms. ... (05 Mar 2000) ... 
Type: Term Pronunciation: pen′ti-lēn-tet′ră-zol Definitions: 1. A powerful CNS stimulant; has been used to cause generalized convulsion in the shock treatment of emotional states and as a respiratory stimulant; mainly used in experimental studies of seizure mechanisms and the search for new anticonvulsant drugs. &nbs...
[n] - a drug used as a circulatory and respiratory stimulant
pentamethylenetetrazol noun a drug used as a circulatory and respiratory stimulant; larger doses cause convulsions in shock therapy; Metrazol is a trademark