Drug interactions
Amitriptyline + Macimorelin
Severity: Major
Amitriptyline and Macimorelin: 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
Macimorelin modestly prolongs the QT interval and amitriptyline has additional QT-prolonging potential, which could increase the risk of torsades de pointes during the diagnostic test. Macimorelin is given as a single test dose, so exposure is short.
What this interaction means in plain words
Amitriptyline and Macimorelin 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; Macimorelin belongs to Endocrine.
Why it happens
Additive QT interval prolongation.
What to do
Avoid the combination. Where feasible, withhold amitriptyline for an adequate washout before the test, or use another growth hormone stimulation test.
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 Macimorelin
Frequently asked questions
Can I take Amitriptyline with Macimorelin?
MediHelp rates the interaction as major. Amitriptyline and Macimorelin 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. Macimorelin modestly prolongs the QT interval and amitriptyline has additional QT-prolonging potential, which could increase the risk of torsades de pointes during the diagnostic test. Macimorelin is given as a single test dose, so exposure is short.
How serious is the interaction between Amitriptyline and Macimorelin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination. Where feasible, withhold amitriptyline for an adequate washout before the test, or use another growth hormone stimulation test.
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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