Drug interactions
Metaproterenol + Pirbuterol
Severity: Moderate
Metaproterenol and Pirbuterol: moderate 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
Both are beta-2 agonists, so combining them duplicates therapy. It increases the risk of tachycardia, tremor, arrhythmias and hypokalemia without added benefit.
What this interaction means in plain words
Metaproterenol and Pirbuterol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive beta-adrenergic receptor agonism.
What to do
Avoid using two beta-agonists together; choose one agent at the lowest effective dose. Monitor heart rate and potassium if combined use occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Frequently asked questions
Can I take Metaproterenol with Pirbuterol?
MediHelp rates the interaction as moderate. Metaproterenol and Pirbuterol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both are beta-2 agonists, so combining them duplicates therapy. It increases the risk of tachycardia, tremor, arrhythmias and hypokalemia without added benefit.
How serious is the interaction between Metaproterenol and Pirbuterol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid using two beta-agonists together; choose one agent at the lowest effective dose. Monitor heart rate and potassium if combined use occurs.
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