Blockage of the action of epinephrine during local anaesthesia by means of beta-receptor blockade.
D000766:Anesthesia, Dental; D003813:Dentistry; D004837:Epinephrine / Q000037:antagonists & inhibitors; D013565:Sympatholytics / Q000494:pharmacology
D013565:Sympatholytics; D004837:Epinephrine