the influence of the acute ( single dose ) or subchronic ( one dose daily for 4 days ) administration of cocaine to sprague-dawley rats on striatal enkephalin ( met5-enkephalin ) and striatonigral tachykinin ( substance p ) and dynorphin [ dynorphin a ( 1-8 ) , dyn ] levels was investigated .
C0039241
tachykinin
C0038585
substance p