What the FDA labels say about taking them together
Isoproterenol and opicapone
Opicapone's FDA label of October 15, 2025 names isoproterenol in its warnings and precautions section; the isoproterenol label PlainMeds reads does not name opicapone. The opicapone label: “Effects with Concomitant Use of Drugs Metabol ized by Catechol-O-Methyltransferase (COMT) Possible arrhythmias, increased heart rate, and excessive changes in blood pressure may occur with concomitant use of ONGENTYS …”
Check it at the source: the isoproterenol FDA label on DailyMed (effective December 16, 2025, Eugia US LLC); the opicapone FDA label on DailyMed (effective October 15, 2025, Amneal Pharmaceuticals LLC).
What does the isoproterenol label say about opicapone?
Isoproterenol's label (effective December 16, 2025) does not name opicapone 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
What does the opicapone label say about isoproterenol?
Opicapone label, warnings and precautionsEffects with Concomitant Use of Drugs Metabol ized by Catechol-O-Methyltransferase (COMT) Possible arrhythmias, increased heart rate, and excessive changes in blood pressure may occur with concomitant use of ONGENTYS and drugs metabolized by COMT (e.g., isoproterenol, epinephrine, norepinephrine, dopamine, and dobutamine), regardless of the route of administration (including inhalation).
Source: FDA drug label (ONGENTYS), Amneal Pharmaceuticals LLC, effective October 15, 2025 (SPL set a511a531-112e-43f8-a43f-5334b0efe979), 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
| Isoproterenol | Opicapone | |
|---|---|---|
| Labeled for | n/a | Parkinson's disease |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | n/a | $24.67 per capsule 25 mg capsule |
| 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