Drug interactions
Minoxidil + Nitroglycerin rectal
Severity: Moderate
Minoxidil 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
Both drugs cause vasodilation, so the combination may produce marked hypotension, dizziness and syncope. Reflex tachycardia from minoxidil may be a concern in patients with coronary disease. Rectal nitroglycerin is systemically absorbed, so the effect is relevant.
What this interaction means in plain words
Minoxidil 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 vasodilation through nitric oxide-mediated relaxation and minoxidil potassium channel opening.
What to do
Monitor blood pressure and heart rate when starting or adjusting either drug. Lower the dose of one agent if symptomatic hypotension occurs.
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 Minoxidil
Frequently asked questions
Can I take Minoxidil with Nitroglycerin rectal?
MediHelp rates the interaction as moderate. Minoxidil 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. Both drugs cause vasodilation, so the combination may produce marked hypotension, dizziness and syncope. Reflex tachycardia from minoxidil may be a concern in patients with coronary disease. Rectal nitroglycerin is systemically absorbed, so the effect is relevant.
How serious is the interaction between Minoxidil 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 and heart rate when starting or adjusting either drug. Lower the dose of one agent if symptomatic hypotension occurs.
What other medicines interact with Minoxidil?
MediHelp also lists interactions of Minoxidil with, for example, Aldesleukin, Amifostine, Amlodipine-hydrochlorothiazide-valsartan. The full list is on the Minoxidil page.
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