What the FDA labels say about taking them together
Aminophylline and isoproterenol
Aminophylline's FDA label of May 22, 2026 names isoproterenol in its drug interactions section; the isoproterenol label PlainMeds reads does not name aminophylline. The aminophylline label: “100% increase Isoproterenol (I.V.) Increases theophylline clearance.”
Check it at the source: the aminophylline FDA label on DailyMed (effective May 22, 2026, Hospira, Inc.); the isoproterenol FDA label on DailyMed (effective December 16, 2025, Eugia US LLC).
What does the aminophylline label say about isoproterenol?
Aminophylline label, drug interactions100% increase Isoproterenol (I.V.) Increases theophylline clearance.
Source: FDA drug label (Aminophylline), Hospira, Inc., effective May 22, 2026 (SPL set 9a663ef3-881f-48bd-2689-3713b24545c2), via openFDA; the full label on DailyMed
What does the isoproterenol label say about aminophylline?
Isoproterenol's label (effective December 16, 2025) does not name aminophylline in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Isoproterenol Hydrochloride), Eugia US LLC, effective December 16, 2025 (SPL set 3e4050e8-7d94-4ed7-951d-1ff818ddadf1), 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
| Aminophylline | Isoproterenol | |
|---|---|---|
| Labeled for | Asthma | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | n/a | n/a |
| 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