What the FDA labels say about taking them together
Foscarbidopa/foslevodopa and levodopa
Foscarbidopa/foslevodopa's FDA label of March 19, 2026 names levodopa in its warnings and precautions section; the levodopa label PlainMeds reads does not name foscarbidopa/foslevodopa. The foscarbidopa/foslevodopa label: “Hallucinations associated with levodopa may present shortly after the initiation of therapy and may be responsive to dose reduction of VYALEV or other concomitantly administered medications.”
Check it at the source: the foscarbidopa/foslevodopa FDA label on DailyMed (effective March 19, 2026, AbbVie Inc.); the levodopa FDA label on DailyMed (effective July 20, 2026, Merz Pharmaceuticals, LLC).
What does the foscarbidopa/foslevodopa label say about levodopa?
Foscarbidopa/foslevodopa label, warnings and precautionsHallucinations associated with levodopa may present shortly after the initiation of therapy and may be responsive to dose reduction of VYALEV or other concomitantly administered medications.
Source: FDA drug label (Vyalev), AbbVie Inc., effective March 19, 2026 (SPL set 28e806e4-951c-40a9-9f0c-d0929caf054c), via openFDA; the full label on DailyMed
What does the levodopa label say about foscarbidopa/foslevodopa?
Levodopa's label (effective July 20, 2026) does not name foscarbidopa/foslevodopa in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Inbrija), Merz Pharmaceuticals, LLC, effective July 20, 2026 (SPL set 077c0f39-a3a2-4b2b-a184-09131889dcfb), 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
| Foscarbidopa/foslevodopa | Levodopa | |
|---|---|---|
| Labeled for | Parkinson's disease | Parkinson's disease |
| 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