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Lithium and Thiazide Diuretic: Drug Interaction Guide

Quick answer: This is a major interaction — avoid combining Lithium and Thiazide Diuretic unless specifically directed by your doctor.

Interaction severity: Major — avoid combination

How Lithium interacts with Thiazide Diuretic

Diuretics reduce lithium clearance, raising levels.

What you should do

Avoid combination if possible; if used, reduce lithium dose by 50% and monitor.

Key facts

Severity

Major — avoid combination

Mechanism

Diuretics reduce lithium clearance, raising levels.

Action

Avoid combination if possible; if used, reduce lithium dose by 50% and monitor.

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Lithium and Thiazide Diuretic together?

No — this combination should generally be avoided. Avoid combination if possible; if used, reduce lithium dose by 50% and monitor.

What is the severity of this interaction?

The interaction between Lithium and Thiazide Diuretic is classified as Major — avoid combination. Diuretics reduce lithium clearance, raising levels.

What should I do if I'm prescribed both?

Avoid combination if possible; if used, reduce lithium dose by 50% and monitor. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.