Drug interactions
Amitriptyline + Epinephrine
Severity: Major
Amitriptyline and Epinephrine: major 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
Tricyclics block norepinephrine reuptake and sensitise adrenergic receptors, so systemic epinephrine can cause exaggerated hypertension, tachycardia and arrhythmias. The effect is most important with parenteral or large doses, whereas small amounts in dental local anaesthetics carry less risk.
What this interaction means in plain words
Amitriptyline and Epinephrine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Amitriptyline belongs to Central Nervous System; Epinephrine belongs to Endocrine.
Why it happens
Tricyclic blockade of catecholamine reuptake potentiates pressor and arrhythmogenic responses to epinephrine.
What to do
Use the lowest effective epinephrine dose with continuous blood pressure and ECG monitoring when systemic use is needed. Limit epinephrine in local anaesthetics and avoid intravascular injection.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Other interactions of Epinephrine
- Epinephrine + Isocarboxazid Contraindicated
- Epinephrine + Phenelzine Contraindicated
- Epinephrine + Tranylcypromine Contraindicated
- Acebutolol + Epinephrine Major
- Amoxapine + Epinephrine Major
- Atenolol-chlorthalidone + Epinephrine Major
Frequently asked questions
Can I take Amitriptyline with Epinephrine?
MediHelp rates the interaction as major. Amitriptyline and Epinephrine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Tricyclics block norepinephrine reuptake and sensitise adrenergic receptors, so systemic epinephrine can cause exaggerated hypertension, tachycardia and arrhythmias. The effect is most important with parenteral or large doses, whereas small amounts in dental local anaesthetics carry less risk.
How serious is the interaction between Amitriptyline and Epinephrine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective epinephrine dose with continuous blood pressure and ECG monitoring when systemic use is needed. Limit epinephrine in local anaesthetics and avoid intravascular injection.
What other medicines interact with Amitriptyline?
MediHelp also lists interactions of Amitriptyline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Amitriptyline page.
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