Drug interactions
Cyclopenthiazide + Valsartan
Severity: Minor
Cyclopenthiazide and Valsartan: minor 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
Valsartan is often combined with a thiazide diuretic for additive blood pressure lowering. The thiazide tends to lower serum potassium while valsartan tends to raise it, so the two partly offset each other. Volume depletion and reduced blood pressure or renal function can occur, particularly early in treatment.
What this interaction means in plain words
Cyclopenthiazide and Valsartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Additive antihypertensive effect, with opposing effects on potassium: thiazide-induced renal potassium loss versus angiotensin receptor blockade reducing aldosterone-mediated potassium excretion.
What to do
Monitor blood pressure, serum potassium and creatinine after starting or changing doses. Correct volume depletion before initiation.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Valsartan
- Aliskiren + Valsartan Contraindicated
- Sparsentan + Valsartan Contraindicated
- Aldesleukin + Valsartan Major
- Amifostine + Valsartan Major
- Amiloride + Valsartan Major
- Amlodipine-benazepril + Valsartan Major
Frequently asked questions
Can I take Cyclopenthiazide with Valsartan?
MediHelp rates the interaction as minor. Cyclopenthiazide and Valsartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Valsartan is often combined with a thiazide diuretic for additive blood pressure lowering. The thiazide tends to lower serum potassium while valsartan tends to raise it, so the two partly offset each other. Volume depletion and reduced blood pressure or renal function can occur, particularly early in treatment.
How serious is the interaction between Cyclopenthiazide and Valsartan?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, serum potassium and creatinine after starting or changing doses. Correct volume depletion before initiation.
What other medicines interact with Valsartan?
MediHelp also lists interactions of Valsartan with, for example, Aliskiren, Sparsentan, Aldesleukin. The full list is on the Valsartan page.
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