What the FDA labels say about taking them together
Epinephrine and isoproterenol
Isoproterenol's FDA label of December 16, 2025 names epinephrine in its drug interactions section; the epinephrine labels PlainMeds reads (4) do not name isoproterenol.
Check it at the source: the epinephrine FDA label on DailyMed (effective July 13, 2026, A-S Medication Solutions); the isoproterenol FDA label on DailyMed (effective December 16, 2025, Eugia US LLC).
What does the epinephrine label say about isoproterenol?
Epinephrine's label (effective July 13, 2026) and its 3 other brand-application labels do not name isoproterenol in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Epinephrine), A-S Medication Solutions, effective July 13, 2026 (SPL set 6e811e28-0199-4df7-a916-5940c632401d), via openFDA; the full label on DailyMed
What does the isoproterenol label say about epinephrine?
Isoproterenol label, drug interactionsIntervention; Isoproterenol hydrochloride injection and epinephrine should not be administered simultaneously.
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
| Epinephrine | Isoproterenol | |
|---|---|---|
| Labeled for | Asthma | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $123.51 per unit 0.15 mg auto-injct | n/a |
| Shortage now | A presentation being discontinued | 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