Drug interactions
Candesartan-hydrochlorothiazide + Lithium
Severity: Major
Candesartan-hydrochlorothiazide and Lithium: 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
Both the angiotensin receptor blocker and the thiazide diuretic reduce renal lithium clearance, so serum lithium can rise to toxic levels. Toxicity may present with tremor, confusion, ataxia, vomiting and, in severe cases, seizures or renal damage.
What this interaction means in plain words
Candesartan-hydrochlorothiazide and Lithium 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.
Candesartan-hydrochlorothiazide belongs to Cardiovascular; Lithium belongs to Central Nervous System.
Why it happens
Thiazides and RAS blockers promote sodium loss and increase proximal tubular lithium reabsorption, lowering lithium renal clearance.
What to do
Avoid if possible and choose another antihypertensive. If used, measure serum lithium before and within the first week of therapy, reduce the lithium dose as needed and monitor renal function and hydration.
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 Candesartan-hydrochlorothiazide
- Aliskiren + Candesartan-hydrochlorothiazide Contraindicated
- Candesartan-hydrochlorothiazide + Dofetilide Contraindicated
- Candesartan-hydrochlorothiazide + Sparsentan Contraindicated
- Acemetacin + Candesartan-hydrochlorothiazide Major
- Amifostine + Candesartan-hydrochlorothiazide Major
- Amiloride + Candesartan-hydrochlorothiazide Major
Other interactions of Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
Frequently asked questions
Can I take Candesartan-hydrochlorothiazide with Lithium?
MediHelp rates the interaction as major. Candesartan-hydrochlorothiazide and Lithium 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. Both the angiotensin receptor blocker and the thiazide diuretic reduce renal lithium clearance, so serum lithium can rise to toxic levels. Toxicity may present with tremor, confusion, ataxia, vomiting and, in severe cases, seizures or renal damage.
How serious is the interaction between Candesartan-hydrochlorothiazide and Lithium?
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 if possible and choose another antihypertensive. If used, measure serum lithium before and within the first week of therapy, reduce the lithium dose as needed and monitor renal function and hydration.
What other medicines interact with Candesartan-hydrochlorothiazide?
MediHelp also lists interactions of Candesartan-hydrochlorothiazide with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Candesartan-hydrochlorothiazide page.
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