RT Book, Section A1 DeRoos Francis, Jerome A2 Hoffman, Robert S. A2 Howland, Mary Ann A2 Lewin, Neal A. A2 Nelson, Lewis S. A2 Goldfrank, Lewis R. SR Print(0) ID 1108431096 T1 Miscellaneous Antihypertensives and Pharmacologically Related Agents T2 Goldfrank's Toxicologic Emergencies, 10e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071801843 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1108431096 RD 2024/04/20 AB Hypertension is one of the commonest chronic medical problems and one of the most readily amenable to pharmacotherapy. Beginning in the 1960s, when asymptomatic hypertension was linked to significant adverse effects such as stroke, myocardial infarction, and sudden death, antihypertensive pharmacotherapeutics began being used. The first generation included centrally acting, sympatholytics, direct vasodilators, sodium nitroprusside, and diuretics. Unfortunately, these often had significant adverse events, leading to the development of β-adrenergic antagonists, calcium channel blockers (CCBs), angiotensin-converting enzyme inhibitors (ACEIs), angiotensin receptor blockers (ARBs), and, more recently, direct renin inhibitors (DRIs). This chapter reviews the first-generation antihypertensives, as well ACEIs, ARBs, and DRIs. In general, the majority of antihypertensives manifest clinical signs and symptoms in terms of the degree of hypotension produced. Particular attention will be placed on mechanisms of action and unique toxicologic considerations for each of these xenobiotics.