Nepafenac and Amitriptyline: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Amitriptyline
Nepafenac
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're taking amitriptyline (a tricyclic antidepressant) along with nepafenac, which is an NSAID. Even though nepafenac is an eye drop, combining these two types of medicines has been linked to a higher chance of bleeding, including rare but serious bleeding in the brain, especially in the first month of using them together.
This doesn't mean something bad will happen, but it's worth being aware of. Watch for things like unusual bruising, nosebleeds, blood in your stool or urine, or a severe headache. Please don't stop either medicine on your own. Your pharmacist or doctor can keep an eye on you and adjust your care so you stay safe.
Effect: Increased bleeding risk when a tricyclic antidepressant (amitriptyline) is combined with an NSAID (nepafenac), including reports of intracranial hemorrhage within 30 days of concomitant use.
- Direction: Additive/synergistic increase in bleeding risk (neither agent requires bioactivation for this effect).
- Mechanism: Unknown; proposed contributions include NSAID antiplatelet/GI effects and TCA-mediated platelet serotonin effects.
- Evidence: Established. Severity: Major. Onset: Unspecified.
- Management: Use with caution; monitor for signs of bleeding (bruising, GI bleeding, neurologic changes). Note nepafenac is topical ophthalmic with low systemic exposure, likely reducing but not eliminating concern.
What happens
An increased risk of bleeding
Interaction Deep Dive
Exercise caution when NSAIDs and tricyclic antidepressants are administered together, since combined use may raise the likelihood of bleeding, such as intracranial hemorrhage occurring within 30 days of concurrent therapy1. If these agents are used at the same time, watch the patient for indications of heightened bleeding.
Why it happens (mechanism)
Unknown
How to manage this interaction
Your care team can manage this combination safely with some awareness and monitoring.
- Keep taking both as prescribed unless your prescriber tells you otherwise.
- Your team may monitor you more closely for signs of bleeding, particularly early in treatment.
- Watch for and report: easy bruising, nosebleeds, bleeding gums, blood in urine or stool, black stools, or a sudden severe headache.
- Tell your pharmacist about any other blood thinners, aspirin, or oral NSAIDs you use.
Raise any concerns with your pharmacist or doctor so your treatment can be tailored to you.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
a) The simultaneous use of NSAIDs and antidepressants, including tricyclic antidepressants, SSRIs, serotonin-norepinephrine reuptake inhibitors, and MAOIs, led to a heightened risk of intracranial hemorrhage within 30 days of combined use when compared with the use of antidepressants by themselves. No significant difference was found among the antidepressant drug classes regarding the increased risk; however, an elevated risk was observed in male patients as opposed to female patients 1.
Common questions
Can I take Nepafenac and Amitriptyline together?
Combining amitriptyline with the NSAID nepafenac can raise bleeding risk, so watch for unusual bleeding or bruising and keep taking both as prescribed while your care team monitors you. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Nepafenac and Amitriptyline interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Nepafenac and Amitriptyline interaction managed?
Your care team can manage this combination safely with some awareness and monitoring. Keep taking both as prescribed unless your prescriber tells you otherwise. Your team may monitor you more closely for signs of bleeding, particularly early in treatment. Watch for and report: easy bruising, nosebleeds, bleeding gums, blood in urine or stool, black stools, or a sudden severe headache. Tell your ph… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "established". Well documented — supported by controlled studies or strong clinical data.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Nepafenac or Amitriptyline 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 a safer alternative to one of these medications for me?
References (1)
- Shin JY, Park MJ, Lee SH, et al: Risk of intracranial haemorrhage in antidepressant users with concurrent use of non-steroidal anti-inflammatory drugs: nationwide propensity score matched study. BMJ 2015; 351:h3517. PubMed
Keep reading about Amitriptyline
Keep reading about Nepafenac
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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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