Arformoterol 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
Arformoterol
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 amitriptyline (Elavil), a medicine often used for depression or nerve pain, along with arformoterol (Brovana), an inhaled breathing medicine for COPD. Arformoterol works by stimulating the same system that revs up your heart, and amitriptyline can add to that effect. Together, they may put a little extra stress on your heart, like a faster or more irregular heartbeat.
This concern is mostly theoretical, meaning it's based on how the drugs work rather than lots of real-world reports. Still, it's worth watching. Let your care team know you take both, and mention any racing heartbeat, palpitations, chest discomfort, or dizziness. Your doctor and pharmacist can manage this safely.
Effect: Additive/potentiated cardiovascular adrenergic stimulation when arformoterol (a long-acting beta-2 agonist) is combined with amitriptyline (a TCA).
Mechanism: TCAs potentiate the sympathomimetic/cardiovascular effects of beta-agonists (enhanced adrenergic tone, plus TCA effects on cardiac conduction), raising risk of tachycardia, arrhythmia, and QT-related concerns. Neither agent is enzyme-dependent for this PD interaction; this is pharmacodynamic, not PK.
- Direction: increased cardiovascular effect
- Onset: unspecified
- Evidence: theoretical
- Severity: moderate
Management: Use with caution; monitor HR, rhythm/ECG, blood pressure, and symptoms. Dose may be individualized by the care team.
What happens
An increased risk of cardiovascular excitation
Interaction Deep Dive
Giving arformoterol together with a tricyclic antidepressant (TCA) can enhance the drug's adrenergic actions on the cardiovascular system. For this reason, extreme caution is warranted when arformoterol is given to patients already receiving a TCA1. Watch these patients carefully for unfavorable cardiovascular effects.
Why it happens (mechanism)
Potentiation of cardiovascular effects
How to manage this interaction
If both medicines are prescribed, the goal is to use them together safely, not to stop either on your own.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise.
- Your care team may watch you more closely for cardiovascular effects, such as checking your heart rate, rhythm, or blood pressure.
- Doses may be adjusted and individualized by your team if needed.
- Report a racing or irregular heartbeat, palpitations, chest pain, or feeling faint promptly.
Ask your pharmacist or doctor any time you start, stop, or change either medicine.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Arformoterol and Amitriptyline together?
Combining amitriptyline with arformoterol may add extra strain on the heart (faster or irregular heartbeat). Keep taking both as prescribed, watch for heart symptoms, and let your care team monitor you. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Arformoterol and Amitriptyline 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 Arformoterol and Amitriptyline interaction managed?
If both medicines are prescribed, the goal is to use them together safely, not to stop either on your own. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Your care team may watch you more closely for cardiovascular effects, such as checking your heart rate, rhythm, or blood pressure. Doses may be adjusted and individualized by your team if needed. Report a racin… 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.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Arformoterol 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 anything you'd monitor while I'm on both?
References (1)
- Product Information: BROVANA(TM) inhalation solution, arformoterol tartrate inhalation solution. Sepracor,Inc, Marlborough, MA, 2006. DailyMed
Keep reading about Amitriptyline
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