Physalaemin, originally isolated from the Physalaemus frog, is a tachykinin peptide closely related to Substance P. It is a potent vasodialator and has hypotensive effects. De Caro, G; et al., Naunyn-Schmiedebergs Arch. Pharmak. u. exp. Path., 254, 194 (1966); Mitsuma, T; et al., Exp. Clin. Endocrinol. Diabetes, 85, 319 (1985); Lobasso, S; et al., Arch. Physiol. Biochem., 105, 329 (1997).
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