Phenylbutynamine (4-phenylbut-3-yn-2-amine; development code PAL-874) is a monoamine releasing agent (MRA) of the arylalkylamine family related to ò-phenethylamine and amphetamine. It acts as a norepinephrineâÂÂdopamine releasing agent (NDRA), albeit with far lower potency than ò-phenethylamine or amphetamine.