Drug interactions
Brimonidine + Protriptyline
Severity: Moderate
Brimonidine and Protriptyline: 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
Tricyclic antidepressants may blunt the blood pressure lowering effect of alpha-2 agonists. Brimonidine labeling advises caution with antidepressants affecting noradrenergic transmission. Protriptyline is less sedating than other tricyclics, so additive sedation is limited.
What this interaction means in plain words
Brimonidine and Protriptyline 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
Tricyclic inhibition of norepinephrine reuptake may antagonize alpha-2 agonist effects, with possible additive CNS effects.
What to do
Monitor intraocular pressure response and blood pressure when starting or stopping protriptyline. Counsel on drowsiness.
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 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 Protriptyline?
MediHelp rates the interaction as moderate. Brimonidine and Protriptyline 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. Tricyclic antidepressants may blunt the blood pressure lowering effect of alpha-2 agonists. Brimonidine labeling advises caution with antidepressants affecting noradrenergic transmission. Protriptyline is less sedating than other tricyclics, so additive sedation is limited.
How serious is the interaction between Brimonidine and Protriptyline?
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 intraocular pressure response and blood pressure when starting or stopping protriptyline. Counsel on drowsiness.
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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