Letter: Salbutamol: agonistic and antagonistic activity at beta--adrenoceptor sites.
D000420:Albuterol / Q000037:antagonists & inhibitors; D000818:Animals; D006168:Guinea Pigs; D006325:Heart Atria / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000037:antagonists & inhibitors; D009119:Muscle Contraction / Q000187:drug effects; D011941:Receptors, Adrenergic; D014132:Trachea / Q000187:drug effects
D011941:Receptors, Adrenergic; D007545:Isoproterenol; D000420:Albuterol