Antihypertensives Part 4 – Nitrates
Real Life Pharmacology - Pharmacology Education for Health Care Professionals
Eric Christianson, PharmD; Pharmacology Expert and Clinical Pharmacist
4.9 • 773 Ratings
🗓️ 15 January 2026
⏱️ 14 minutes
🧾️ Download transcript
Summary
Welcome to today’s episode, where we’re diving into the world of nitrate medications—one of the cornerstone therapies in cardiovascular care. Whether you’re a pharmacist, nurse, med student, or just curious about how medications keep the heart happy, nitrates are fascinating because of their unique mechanism and versatile clinical uses.
Nitrates work by releasing nitric oxide, a powerful molecule that relaxes smooth muscle and dilates blood vessels. This vasodilation primarily reduces venous return to the heart, lowering preload and myocardial oxygen demand, and at higher doses, can also decrease afterload. For patients with angina, this means less chest pain, improved exercise tolerance, and better quality of life.
In this episode, we’ll cover the most commonly used nitrates—from sublingual nitroglycerin for rapid relief of acute angina, to isosorbide dinitrate and mononitrate for chronic management. We’ll discuss how their formulations, onset, and duration of action affect clinical use, and why concepts like tolerance and nitrate-free intervals are critical to understand.
We’ll also explore important drug interactions, including why combining nitrates with PDE5 inhibitors can be dangerous, and highlight practical tips for patient counseling and monitoring. By the end of this episode, you’ll have a clear picture of how and when nitrates are used, and the key pearls every clinician should know to maximize benefit while minimizing risk.
So whether you’re reviewing for boards, prepping for clinical rotations, or just brushing up on cardiovascular pharmacology, stay tuned—we’re about to break down nitrates in a way that’s simple, practical, and memorable.
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Transcript
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| 0:00.0 | Hey, oh, welcome back to the real-life pharmacology podcast. |
| 0:03.1 | I'm your host, pharmacist, Eric Christensen. |
| 0:05.2 | Thank you so much for listening today. |
| 0:07.9 | We are continuing on with our cardiovascular topics, |
| 0:13.6 | and I am going to tackle nitrates in general, |
| 0:18.3 | how they work, what they're used for, all that good stuff. But before I do that, |
| 0:23.1 | be sure you go to real-life pharmacology.com. Take advantage of the free 31-page PDF. It's a study |
| 0:31.3 | guide of the top 200 drugs, tons of no-brainers, things that are going to show up on pharmacology exams and board exams, |
| 0:40.0 | as well as stuff that just happens in real life as well. |
| 0:43.8 | So again, go take advantage of that at real lifepharmacology.com. |
| 0:48.8 | Simply an email. |
| 0:49.9 | We'll get you access to that. |
| 0:52.4 | All right. |
| 0:53.1 | So let's get into nitrates. |
| 0:56.4 | So stepping back from a big picture aspect, |
| 1:00.5 | nitrates are vasodilators, |
| 1:03.1 | and the use that I've seen most in practice |
| 1:06.8 | is management, prevention, treatment of angina and acute coronary syndromes. |
| 1:13.6 | And they benefit the heart specifically by reducing myocardial oxygen demand. |
| 1:21.8 | And they can also increase coronary blood flow to the heart as well. |
| 1:27.6 | The clinical uses, a couple examples I alluded to already, angina, acute coronary syndromes. |
| 1:35.0 | These medications do drop blood pressure as well, so you may see them in hypertensive emergencies |
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