What the FDA labels say about taking them together
Arformoterol and theophylline
Arformoterol's FDA label of April 14, 2026 names theophylline in its drug interactions section; the theophylline label PlainMeds reads does not name arformoterol.
Check it at the source: the arformoterol FDA label on DailyMed (effective April 14, 2026, Sun Pharmaceutical Industries, Inc.); the theophylline FDA label on DailyMed (effective March 10, 2026, Strides Pharma Science Limited).
What does the arformoterol label say about theophylline?
Arformoterol label, drug interactionsSteroids or Diuretics Concomitant treatment with methylxanthine (aminophylline, theophylline), steroids, or diuretics may potentiate any hypokalemic effect of adrenergic agonists including arformoterol tartrate inhalation solution [see Warnings and Precautions (5.7)].
Source: FDA drug label (Arformoterol Tartrate), Sun Pharmaceutical Industries, Inc., effective April 14, 2026 (SPL set f1005878-0c48-4b9a-843e-b6cf6b8bb251), via openFDA; the full label on DailyMed
What does the theophylline label say about arformoterol?
Theophylline's label (effective March 10, 2026) does not name arformoterol in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Theophylline), Strides Pharma Science Limited, effective March 10, 2026 (SPL set b7a90ccf-9c32-40cc-9008-7e55b3da4dfd), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Arformoterol | Theophylline | |
|---|---|---|
| Labeled for | COPD | Asthma |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $0.633 per mL 15 mcg/2 mL solution | $0.330 per tablet 300 mg tablet |
| Shortage now | No current entry | No current entry |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once