Drug interactions
Formoterol-mometasone + Triamterene
Severity: Minor
Formoterol-mometasone and Triamterene: 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
Formoterol can lower serum potassium through beta2-mediated cellular uptake, whereas triamterene is potassium-sparing and tends to raise it. The effects oppose each other, so the net change is unpredictable and usually small. Clinical relevance is low in most patients.
What this interaction means in plain words
Formoterol-mometasone and Triamterene have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Formoterol-mometasone belongs to Respiratory; Triamterene belongs to Cardiovascular.
Why it happens
Opposing effects on serum potassium: beta2-agonist-driven intracellular shift versus triamterene inhibition of renal potassium excretion.
What to do
No routine change is needed; check serum potassium if the patient has renal impairment, is on other potassium-affecting drugs, or is using high doses of formoterol.
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 Formoterol-mometasone
Other interactions of Triamterene
- Amiloride + Triamterene Contraindicated
- Eplerenone + Triamterene Contraindicated
- Potassium citrate / citric acid + Triamterene Contraindicated
- Potassium citrate + Triamterene Contraindicated
- Spironolactone + Triamterene Contraindicated
- Aceclofenac + Triamterene Major
Frequently asked questions
Can I take Formoterol-mometasone with Triamterene?
MediHelp rates the interaction as minor. Formoterol-mometasone and Triamterene have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Formoterol can lower serum potassium through beta2-mediated cellular uptake, whereas triamterene is potassium-sparing and tends to raise it. The effects oppose each other, so the net change is unpredictable and usually small. Clinical relevance is low in most patients.
How serious is the interaction between Formoterol-mometasone and Triamterene?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed; check serum potassium if the patient has renal impairment, is on other potassium-affecting drugs, or is using high doses of formoterol.
What other medicines interact with Formoterol-mometasone?
MediHelp also lists interactions of Formoterol-mometasone with, for example, Amiodarone, Amisulpride, Amoxapine. The full list is on the Formoterol-mometasone page.
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