Formoterol and Labetalol interaction
Formoterol and Labetalol: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Formoterol (FORMOTEROL FUMARATE) label · effective 2020-12-15
• Beta-blockers may decrease effectiveness.
In this setting, cardioselective beta-blockers could be considered, although they should be administered with caution.
Beta-blockers Beta-adrenergic receptor antagonists (beta-blockers) and formoterol may inhibit the effect of each other when administered concurrently.
Beta-blockers not only block the therapeutic effects of beta-agonists, but may produce severe bronchospasm in COPD patients.
Therefore, patients with COPD should not normally be treated with beta-blockers.
From the Labetalol (Labetalol Hydrochloride) label · effective 2025-12-19
Beta blockers antagonize the bronchodilator effect of beta-receptor agonists.
Bronchodilators Labetalol HCl antagonizes the bronchodilatory effect of beta-receptor agonist drugs; therefore, labetalol HCl is contraindicated in patients with bronchial asthma [see Contraindications (4) ] .
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.