Acetaminophen And Codeine and Brimonidine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jun 30, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Acetaminophen And Codeine
Brimonidine
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
You've been prescribed acetaminophen with codeine (a pain reliever with an opioid) along with brimonidine (found in eye drops like Alphagan or Lumify, or the face cream Mirvaso). Both of these can have a calming effect on your brain and nervous system. When taken together, that calming effect can add up, so you might feel more drowsy, sleepy, or lightheaded than usual.
The good news is this is a possible, theory-based concern, not something guaranteed to happen. Your care team can manage it easily. Just let your pharmacist or doctor know you use both, and be careful with driving until you know how you feel.
Effect: Additive CNS depression when brimonidine is combined with the codeine (opioid) component of acetaminophen/codeine.
- Mechanism: Pharmacodynamic (additive), not PK. Codeine is a CNS depressant opioid; brimonidine is a central alpha-2 agonist that can cause sedation, fatigue, and somnolence. Effects on CNS depression may summate.
- Direction: Enhanced sedation/CNS depression.
- Evidence: Theoretical; severity moderate; onset unspecified.
- Management: Monitor for excess sedation, drowsiness, hypotension. Counsel on additive effects. Dose may be individualized and monitoring increased by the care team.
What happens
An increased risk of CNS depression
Interaction Deep Dive
Coadministration of brimonidine with CNS depressants may cause additive CNS effects1.
Why it happens (mechanism)
Additive CNS depression
How to manage this interaction
You can generally keep taking both as prescribed. Because both can be sedating, your care team simply watches for added drowsiness.
- Take both exactly as directed and don't stop either on your own.
- Watch for extra sleepiness, dizziness, or lightheadedness, especially early on.
- Be cautious with driving or operating machinery until you know how the combination affects you.
- Avoid alcohol and other sedating products unless your team okays them.
- Tell your pharmacist or prescriber that you use both; the dose may need to be adjusted and individualized, and they may monitor you more closely.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Acetaminophen And Codeine and Brimonidine together?
Taking codeine (in acetaminophen/codeine) with brimonidine may add to drowsiness and dizziness. Keep taking both as prescribed, use caution when driving, and tell your pharmacist or doctor so they can monitor you. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Acetaminophen And Codeine and Brimonidine interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Acetaminophen And Codeine and Brimonidine interaction managed?
You can generally keep taking both as prescribed. Because both can be sedating, your care team simply watches for added drowsiness. Take both exactly as directed and don't stop either on your own. Watch for extra sleepiness, dizziness, or lightheadedness, especially early on. Be cautious with driving or operating machinery until you know how the combination affects you. Avoid alcohol and other sed… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Acetaminophen And Codeine or Brimonidine need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (1)
- Product Information: YUVEZZI™ ophthalmic solution, carbachol brimonidine tartrate 2.75%/0.1% ophthalmic solution. Visus Therapeutics Inc. (per FDA), Seattle, WA, 2026. DailyMed
Keep reading about Acetaminophen And Codeine
Keep reading about Brimonidine
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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