Drug interactions
Atenolol-chlorthalidone + Nitroglycerin rectal
Severity: Moderate
Atenolol-chlorthalidone and Nitroglycerin rectal: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Nitroglycerin causes vasodilation and hypotension, which add to the effects of atenolol and chlorthalidone. Atenolol blunts the reflex tachycardia that normally compensates, so hypotension may be more pronounced. Dizziness and syncope are possible.
What this interaction means in plain words
Atenolol-chlorthalidone and Nitroglycerin rectal can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive hypotensive effects from venodilation, diuresis and beta-blockade, with loss of reflex tachycardia.
What to do
Monitor blood pressure, especially after the first doses, and counsel patients to change position slowly. Reduce the antihypertensive or nitrate dose if hypotension develops.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Atenolol-chlorthalidone
Frequently asked questions
Can I take Atenolol-chlorthalidone with Nitroglycerin rectal?
MediHelp rates the interaction as moderate. Atenolol-chlorthalidone and Nitroglycerin rectal can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Nitroglycerin causes vasodilation and hypotension, which add to the effects of atenolol and chlorthalidone. Atenolol blunts the reflex tachycardia that normally compensates, so hypotension may be more pronounced. Dizziness and syncope are possible.
How serious is the interaction between Atenolol-chlorthalidone and Nitroglycerin rectal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, especially after the first doses, and counsel patients to change position slowly. Reduce the antihypertensive or nitrate dose if hypotension develops.
What other medicines interact with Atenolol-chlorthalidone?
MediHelp also lists interactions of Atenolol-chlorthalidone with, for example, Acebutolol, Aldesleukin, Amiodarone. The full list is on the Atenolol-chlorthalidone page.
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