RT Book, Section A1 Stringer, Janet L. SR Print(0) ID 1142820809 T1 Adrenergic Antagonists T2 Basic Concepts in Pharmacology: What You Need to Know for Each Drug Class, 5e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259861079 LK accessmedicine.mhmedical.com/content.aspx?aid=1142820809 RD 2024/03/28 AB The effects of the sympathetic nervous system can be blocked either by decreasing sympathetic outflow from the brain, suppressing release of norepinephrine from terminals, or by blocking postsynaptic receptors. Adrenergic antagonists reduce the effectiveness of sympathetic nerve stimulation and the effects of exogenously applied agonists, such as isoproterenol. Most often the receptor antagonists are divided into α-receptor antagonists and β-receptor antagonists. This classification will work for us also.