Drug interactions
Brimonidine + Nitroglycerin rectal
Severity: Minor
Brimonidine and Nitroglycerin rectal: minor 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
Rectal nitroglycerin lowers blood pressure through vasodilation. Brimonidine can cause hypotension when systemically absorbed, so the effects may be additive, although this is modest with eye drops.
What this interaction means in plain words
Brimonidine and Nitroglycerin rectal have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Additive hypotensive effects from nitrate-mediated vasodilation and central alpha-2 agonist sympatholytic action.
What to do
Monitor blood pressure and ask about dizziness or lightheadedness, especially when standing. Advise rising slowly.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Brimonidine
- Brimonidine + Isocarboxazid Contraindicated
- Brimonidine + Linezolid Contraindicated
- Brimonidine + Phenelzine Contraindicated
- Brimonidine + Procarbazine Contraindicated
- Brimonidine + Rasagiline Contraindicated
- Brimonidine + Selegiline Contraindicated
Frequently asked questions
Can I take Brimonidine with Nitroglycerin rectal?
MediHelp rates the interaction as minor. Brimonidine and Nitroglycerin rectal have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rectal nitroglycerin lowers blood pressure through vasodilation. Brimonidine can cause hypotension when systemically absorbed, so the effects may be additive, although this is modest with eye drops.
How serious is the interaction between Brimonidine and Nitroglycerin rectal?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure and ask about dizziness or lightheadedness, especially when standing. Advise rising slowly.
What other medicines interact with Brimonidine?
MediHelp also lists interactions of Brimonidine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Brimonidine page.
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