Drug interactions
Lithium + Macimorelin
Severity: Moderate
Lithium and Macimorelin: moderate 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
Both agents can prolong the QT interval, so combined use may add to the risk of torsades de pointes. Macimorelin is given as a single diagnostic dose, so exposure is brief, but a patient on lithium still carries a risk.
What this interaction means in plain words
Lithium and Macimorelin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Lithium belongs to Central Nervous System; Macimorelin belongs to Endocrine.
Why it happens
Additive QTc prolongation through effects on cardiac repolarization.
What to do
Consider a baseline ECG and correct potassium and magnesium before the test. Where practical, follow the labeling on withholding QT-prolonging drugs around the test, or use an alternative diagnostic.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
Other interactions of Macimorelin
Frequently asked questions
Can I take Lithium with Macimorelin?
MediHelp rates the interaction as moderate. Lithium and Macimorelin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both agents can prolong the QT interval, so combined use may add to the risk of torsades de pointes. Macimorelin is given as a single diagnostic dose, so exposure is brief, but a patient on lithium still carries a risk.
How serious is the interaction between Lithium and Macimorelin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider a baseline ECG and correct potassium and magnesium before the test. Where practical, follow the labeling on withholding QT-prolonging drugs around the test, or use an alternative diagnostic.
What other medicines interact with Lithium?
MediHelp also lists interactions of Lithium with, for example, Thioridazine, Vandetanib, Aceclofenac. The full list is on the Lithium page.
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