Chlorthalidone vs. Hydrochlorothiazide: The Debate That Never Ends

Dr. Karen McConnell discusses a recent trial comparing chlorthalidone vs. hydrochlorothiazide for the treatment of hypertension.

0:00-0:40: Intro
0:41-1:51: Introduction of Dr. Karen McConnell
1:52-6:19: Trial overview
6:20-9:15: Karen’s Overall Thoughts
9:16-10:13: Trial Design 
10:14-10:54: Side Effect Differences
10:55-12:36: Choosing Between Chlorthalidone and HCTZ
12:37-14:03: Final Thoughts
14:04-14:49: Closing


  • Hripcsak G, Suchard MA, Shea S, et al. Comparison of Cardiovascular and Safety Outcomes of Chlorthalidone vs Hydrochlorothiazide to Treat Hypertension. JAMA Intern Med 2020. doi: 0.1001/jamainternmed.2019.7454.
  • Lederle FA, Cushman WC, Ferguson RE, Brophy MT, Fiore LD. Chlorthalidone Versus hydrochlorothiazide: a new kind of Veterans Affairs cooperative study. Ann Intern Med 2016;165(9):663-4. doi: 10.7326/M16-1208.
  • Veterans Affairs Diuretic Comparison Project:
  • ALLHAT Officers and Coordinators for the ALLHAT Collaborative Research Group. Major outcomes in high-risk hypertensive patients randomized to angiotensin-converting enzyme inhibitor of calcium channel blocker vs diuretic: The Antihypertensive and Lipid-Lowering Tretment to Prevent Heart Attack Trial (ALLHAT). JAMA 2002;288(23):2981-97.

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