Drug interactions
Citalopram + Indapamide
Severity: Major
Citalopram and Indapamide: 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
Citalopram has a dose-dependent QT-prolonging effect, and indapamide can cause hypokalemia and hypomagnesemia that raise arrhythmia risk. Both drugs can also cause hyponatremia, so the combination may increase the risk of low sodium, especially in older adults.
What this interaction means in plain words
Citalopram and Indapamide 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.
Citalopram belongs to Central Nervous System; Indapamide belongs to Cardiovascular.
Why it happens
Additive QT prolongation with diuretic-induced electrolyte depletion, plus additive hyponatremia from SIADH-like effects of citalopram and renal sodium loss from indapamide.
What to do
Check sodium, potassium and magnesium at baseline and after starting, and correct abnormalities. Obtain an ECG in patients with other QT risk factors and keep citalopram at or below recommended maximum doses.
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 Indapamide
Other interactions of Citalopram
- Cisapride + Citalopram Contraindicated
- Citalopram + Dronedarone Contraindicated
- Citalopram + Escitalopram Contraindicated
- Citalopram + Isocarboxazid Contraindicated
- Citalopram + Methylene blue Contraindicated
- Citalopram + Phenelzine Contraindicated
Frequently asked questions
Can I take Citalopram with Indapamide?
MediHelp rates the interaction as major. Citalopram and Indapamide 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. Citalopram has a dose-dependent QT-prolonging effect, and indapamide can cause hypokalemia and hypomagnesemia that raise arrhythmia risk. Both drugs can also cause hyponatremia, so the combination may increase the risk of low sodium, especially in older adults.
How serious is the interaction between Citalopram and Indapamide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check sodium, potassium and magnesium at baseline and after starting, and correct abnormalities. Obtain an ECG in patients with other QT risk factors and keep citalopram at or below recommended maximum doses.
What other medicines interact with Indapamide?
MediHelp also lists interactions of Indapamide with, for example, Adagrasib, Amifostine, Amiodarone. The full list is on the Indapamide page.
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