Hsu, W H Effects of tetramethylpyrazine on heart rate and pupil diameter in rats. [electronic resource] - Zhongguo yao li xue bao = Acta pharmacologica Sinica Sep 1990 - 431-5 p. digital Publication Type: Journal Article ISSN: 0253-9756 Subjects--Topical Terms: AnimalsHeart Rate--drug effectsInjections, IntravenousMalePupil--drug effectsPyrazines--administration & dosageRatsRats, Inbred Strains