Drug interactions
Cyclopenthiazide + Olmesartan
Severity: Minor
Cyclopenthiazide and Olmesartan: 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
Combining an ARB with a thiazide diuretic is a common and effective antihypertensive strategy. The ARB offsets thiazide-induced potassium loss, but excessive hypotension, volume depletion or renal impairment can occur, especially at initiation.
What this interaction means in plain words
Cyclopenthiazide and Olmesartan 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 blood pressure lowering through complementary mechanisms, with olmesartan reducing aldosterone-mediated potassium loss caused by the thiazide.
What to do
Check blood pressure, renal function and electrolytes after initiation or dose changes. Watch for first-dose hypotension in volume-depleted patients.
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 Olmesartan
- Aliskiren + Olmesartan Contraindicated
- Olmesartan + Sparsentan Contraindicated
- Aldesleukin + Olmesartan Major
- Amifostine + Olmesartan Major
- Amiloride + Olmesartan Major
- Amlodipine-benazepril + Olmesartan Major
Frequently asked questions
Can I take Cyclopenthiazide with Olmesartan?
MediHelp rates the interaction as minor. Cyclopenthiazide and Olmesartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Combining an ARB with a thiazide diuretic is a common and effective antihypertensive strategy. The ARB offsets thiazide-induced potassium loss, but excessive hypotension, volume depletion or renal impairment can occur, especially at initiation.
How serious is the interaction between Cyclopenthiazide and Olmesartan?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check blood pressure, renal function and electrolytes after initiation or dose changes. Watch for first-dose hypotension in volume-depleted patients.
What other medicines interact with Olmesartan?
MediHelp also lists interactions of Olmesartan with, for example, Aliskiren, Sparsentan, Aldesleukin. The full list is on the Olmesartan page.
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