What the FDA labels say about taking them together
Carbidopa and fluorodopa f 18
Fluorodopa f 18's FDA label of January 15, 2021 names carbidopa in its drug interactions section; the carbidopa label PlainMeds reads does not name fluorodopa f 18. The fluorodopa f 18 label: “DRUG INTERACTIONS Aromatic L-amino acid decarboxylase (AADC) inhibitors Prior to Fluorodopa F 18 Injection administration, use of AADC inhibitors may increase Fluorodopa F 18 bioavailability to the brain by inhibiting …”
Check it at the source: the carbidopa FDA label on DailyMed (effective July 2, 2020, Oceanside Pharmaceuticals); the fluorodopa f 18 FDA label on DailyMed (effective January 15, 2021, THE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCH).
What does the carbidopa label say about fluorodopa f 18?
Carbidopa's label (effective July 2, 2020) does not name fluorodopa f 18 in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Carbidopa), NDA017830 (Aton), as published by Oceanside Pharmaceuticals, effective July 2, 2020 (SPL set d5204e5e-10ef-4758-8fc6-cb710048c687), via openFDA; the full label on DailyMed
What does the fluorodopa f 18 label say about carbidopa?
Fluorodopa f 18 label, drug interactionsDRUG INTERACTIONS Aromatic L-amino acid decarboxylase (AADC) inhibitors Prior to Fluorodopa F 18 Injection administration, use of AADC inhibitors (e.g. carbidopa, benserazide etc.) may increase Fluorodopa F 18 bioavailability to the brain by inhibiting peripheral decarboxylase activity and restricting peripheral Fluorodopa F 18 metabolism [see Dosage and Administration ( 2.3 )].
Source: FDA drug label (Fluorodopa F18), THE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCH, effective January 15, 2021 (SPL set 37f8c405-ccb6-4fcd-8513-108956bb1674), 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
| Carbidopa | Fluorodopa f 18 | |
|---|---|---|
| Labeled for | Parkinson's disease | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $0.536 per tablet 25 mg tablet | 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