Drug interactions
Methyclothiazide + Telmisartan
Severity: Minor
Methyclothiazide and Telmisartan: 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
Telmisartan and thiazide diuretics are commonly combined for additive blood pressure lowering. The ARB tends to offset thiazide-induced potassium loss, though excessive hypotension, volume depletion or electrolyte disturbances can occur.
What this interaction means in plain words
Methyclothiazide and Telmisartan 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
Complementary pharmacodynamic actions: diuresis and sodium depletion with RAAS blockade, with opposing effects on potassium.
What to do
Monitor blood pressure, electrolytes and renal function when starting or changing doses. Reduce the diuretic dose if volume depletion or hypotension occurs.
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 Telmisartan
- Aliskiren + Telmisartan Contraindicated
- Sparsentan + Telmisartan Contraindicated
- Amifostine + Telmisartan Major
- Amiloride + Telmisartan Major
- Amlodipine-benazepril + Telmisartan Major
- Amlodipine-hydrochlorothiazide-valsartan + Telmisartan Major
Frequently asked questions
Can I take Methyclothiazide with Telmisartan?
MediHelp rates the interaction as minor. Methyclothiazide and Telmisartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Telmisartan and thiazide diuretics are commonly combined for additive blood pressure lowering. The ARB tends to offset thiazide-induced potassium loss, though excessive hypotension, volume depletion or electrolyte disturbances can occur.
How serious is the interaction between Methyclothiazide and Telmisartan?
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, electrolytes and renal function when starting or changing doses. Reduce the diuretic dose if volume depletion or hypotension occurs.
What other medicines interact with Telmisartan?
MediHelp also lists interactions of Telmisartan with, for example, Aliskiren, Sparsentan, Amifostine. The full list is on the Telmisartan page.
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