Drug interactions
Clomipramine + Pantoprazole
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.
Overview
Pantoprazole can cause hypomagnesemia with prolonged use, which may potentiate clomipramine-associated QT prolongation and risk of ventricular arrhythmias (e.g., torsades de pointes).
Mechanism of action
Pharmacodynamic: Chronic PPI therapy may lower serum magnesium; low magnesium augments QT prolongation and proarrhythmic potential of clomipramine.
Clinical management
If combined long-term, check baseline and periodic serum magnesium (and potassium), correct abnormalities, and consider ECG monitoring in high-risk patients. Use the lowest effective PPI dose or alternative acid suppression if recurrent hypomagnesemia occurs. Educate patients to seek care for palpitations or syncope.
Drug reference
References
- Pantoprazole (Protonix) Prescribing Information — FDA Label
- Clomipramine (Anafranil) Prescribing Information — FDA Label
- Proton pump inhibitors: Overview of adverse effects, including hypomagnesemia — UpToDate
Frequently asked questions
Can I take Clomipramine with Pantoprazole?
The interaction is rated: Moderate. Pantoprazole can cause hypomagnesemia with prolonged use, which may potentiate clomipramine-associated QT prolongation and risk of ventricular arrhythmias (e.g., torsades de pointes).
How serious is the interaction between Clomipramine and Pantoprazole?
The interaction is rated: Moderate. Evidence level: Moderate.
How is the interaction between Clomipramine and Pantoprazole managed?
If combined long-term, check baseline and periodic serum magnesium (and potassium), correct abnormalities, and consider ECG monitoring in high-risk patients. Use the lowest effective PPI dose or alternative acid suppression if recurrent hypomagnesemia occurs. Educate patients to seek care for palpitations or syncope.
Why do Clomipramine and Pantoprazole interact?
Pharmacodynamic: Chronic PPI therapy may lower serum magnesium; low magnesium augments QT prolongation and proarrhythmic potential of clomipramine.
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