RT Book, Section A1 Trevor, Anthony J. A1 Katzung, Bertram G. A1 Kruidering-Hall, Marieke SR Print(0) ID 1123459812 T1 Adrenoceptor Blockers T2 Katzung & Trevor's Pharmacology: Examination & Board Review, 11e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071826358 LK accesspharmacy.mhmedical.com/content.aspx?aid=1123459812 RD 2022/05/22 AB Alpha- and beta-adrenoceptor-blocking agents are divided into primary subgroups on the basis of their receptor selectivity. All of these agents are pharmacologic antagonists or partial agonists and most are reversible and competitive in action. Because α and β blockers differ markedly in their effects and clinical applications, these drugs are considered separately in the following discussion.