Drug interactions
Formoterol + Potassium chloride
Severity: Minor
Formoterol and Potassium chloride: 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 intracellular shift, whereas potassium chloride raises it. The effects are opposing and often offset, so the combination is generally harmless and may even be useful when hypokalemia is a concern.
What this interaction means in plain words
Formoterol and Potassium chloride 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 belongs to Respiratory; Potassium chloride belongs to Gastrointestinal Tract.
Why it happens
Opposing effects on serum potassium: beta-2 agonist-driven cellular uptake versus potassium supplementation.
What to do
No routine adjustment is needed. Monitor serum potassium in patients with renal impairment, those on other potassium-altering drugs, or those taking high doses.
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
- Adagrasib + Formoterol Major
- Amiodarone + Formoterol Major
- Amisulpride + Formoterol Major
- Amitriptyline + Formoterol Major
- Amoxapine + Formoterol Major
- Arformoterol + Formoterol Major
Other interactions of Potassium chloride
Frequently asked questions
Can I take Formoterol with Potassium chloride?
MediHelp rates the interaction as minor. Formoterol and Potassium chloride 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 intracellular shift, whereas potassium chloride raises it. The effects are opposing and often offset, so the combination is generally harmless and may even be useful when hypokalemia is a concern.
How serious is the interaction between Formoterol and Potassium chloride?
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 adjustment is needed. Monitor serum potassium in patients with renal impairment, those on other potassium-altering drugs, or those taking high doses.
What other medicines interact with Formoterol?
MediHelp also lists interactions of Formoterol with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Formoterol page.
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