title: Tachyphylaxis due to the D-Phe7 analogue of substance P.
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects*; D013373:Substance P / Q000031:analogs & derivatives* / Q000494:pharmacology; D013618:Tachyphylaxis
chemical_list: D013373:Substance P; C026003:substance P, Phe(7)-