Long-acting beta-2 agonist (LABA)
Formoterol drug interactions: a practical overview
Drug interactions are the single biggest cause of preventable medication problems. Formoterol (Formoterol) interacts to varying degrees with several classes of medication and with a smaller list of foods. This page summarises the practically important ones at 80/4.5 mcg, 160/4.5 mcg, 200/6 mcg, 400/12 mcg, framed for a real-world prescription review rather than an exhaustive PDF list.
High-priority interactions for Formoterol
For Formoterol, the most clinically relevant interactions are typically with strong CYP3A4 inhibitors and inducers, with cardiovascular medications (notably nitrates for several Long-acting beta-2 agonist (LABA) agents), with central nervous system depressants, and with medications affecting blood pressure or heart rate. Formoterol selectively activates beta-2 adrenergic receptors on airway smooth muscle, producing bronchodilation through cyclic AMP-mediated relaxation.
Working with the pharmacist
A pharmacist review of all current medications is the practical safeguard against unintended interactions with Formoterol. According to the prescribing information for Formoterol, the full medication list — prescription, OTC, supplements and recreational substances — should be reviewed before starting and at every dose change at 80/4.5 mcg, 160/4.5 mcg, 200/6 mcg, 400/12 mcg.
Frequently asked questions
What's the most important Formoterol interaction to know? ▾
For most Long-acting beta-2 agonist (LABA) medications, the highest-priority interaction is with nitrate medications used for chest pain — this combination is often a hard contraindication. After that, strong CYP3A4 inhibitors (some antifungals, macrolides) are the next concern at routine 80/4.5 mcg, 160/4.5 mcg, 200/6 mcg, 400/12 mcg doses.
Do I need to tell the pharmacist about supplements? ▾
Yes. Supplements and herbal products can interact with Formoterol in ways that prescription drug-drug interaction databases miss. The pharmacist needs the complete picture — including supplements like St John's Wort, grapefruit-containing products and high-dose vitamins — to flag risks at 80/4.5 mcg, 160/4.5 mcg, 200/6 mcg, 400/12 mcg.
Products containing Formoterol
More on Formoterol
- With alcoholFormoterol and alcohol — is it safe to drink?
- With foodShould Formoterol be taken with food?
- Side effectsFormoterol side effects: common, rare and warning signs
- Dosage guideFormoterol dosage guide: how much to take and when
- OnsetHow fast does Formoterol start working?
- DurationHow long does Formoterol last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.