Citicoline and medications.
Citicoline is in the Distil supplement database, evidence Grade B. The page below lists every medication we have explicitly assessed it against.
Citicoline, also known as CDP-choline, supplies raw material for acetylcholine and for repairing the phospholipid membranes of brain cells, with a mild effect on dopamine as well. It is used for focus, memory and neuroprotection, and the evidence is Grade B: a Cochrane review by Fioravanti covers cognitive impairment and McGlade's trial looks at healthy attention, so it is reasonably but not strongly supported. The usual dose is 250 to 500mg daily, which is well tolerated; higher doses can bring headache, stomach upset or trouble sleeping. On the supplement side it pairs with omega-3 DHA for brain membrane synthesis and with lion's mane as part of a cognitive stack. The one drug interaction to know is levodopa: citicoline raises dopamine activity, and in Parkinson's trials people needed less levodopa for the same symptom control, so anyone on co-careldopa or co-beneldopa should raise it with their Parkinson's team rather than adjusting a dose themselves. For someone targeting cognition, it is a steady, low-risk choice, best judged over weeks rather than days and kept earlier in the day if sleep is sensitive.
Below are the 2 documented pairs we have explicitly assessed for Citicoline: 2 amber. The pairs cluster around 1 mechanism: Dopaminergic potentiation (levodopa-sparing). Every call is cited to either a clinical reference (PMID) or the British National Formulary. Anything not listed here is either still to be assessed or beyond our database scope. The checker beneath surfaces assessments by medication, and the missing-item form at the bottom of the page routes any uncatalogued medication into our next curation pass.
Documented interactions
Last reviewed 14 June 2026. Each interaction below lists the evidence its assessment drew on: some rest on studies of the exact pair, others on mechanism evidence, where a citation may support one part of the reasoning rather than the exact combination. The evidence line on each entry says which.
Dopaminergic potentiation (levodopa-sparing)
Amber Does interact with Co-beneldopa (Benserazide/levodopa)?
Citicoline raises dopamine activity in the brain, and in Parkinson's studies it has let people get the same control of symptoms on a lower dose of levodopa, in some cases up to half. This is generally a helpful effect rather than a dangerous one, but it is still an interaction: do not adjust your levodopa dose yourself. If you want to try citicoline, raise it with your Parkinson's team so any change in your levodopa dose is planned and supervised.
Evidence: Supported by human study data.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Co-careldopa (Carbidopa/levodopa)?
Citicoline raises dopamine activity in the brain, and in Parkinson's studies it has let people get the same control of symptoms on a lower dose of levodopa, in some cases up to half. This is generally a helpful effect rather than a dangerous one, but it is still an interaction: do not adjust your levodopa dose yourself. If you want to try citicoline, raise it with your Parkinson's team so any change in your levodopa dose is planned and supervised.
Evidence: Supported by human study data.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
What this list does not say. Pairs not flagged here are not implicitly safe. They are either not yet in our database, or fall outside our inclusion scope. Use the checker below to surface any medication, and submit a missing item if you take something we have not catalogued.
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How we grade severity, choose what's in scope, and what we exclude.
Every call on this page is reasoned. We publish the full rubric for severity tiers, the medication inclusion logic, the evidence grades we accept, and what we deliberately leave out. About three thousand words. Worth reading once if you use this tool more than occasionally.
Read the full methodologyA full supplement review, built around you, not a generic stack.
The free checker answers one interaction question at a time. A Distil report reviews the bigger picture: your goals, diet, medications, current supplements and any blood results you provide, then shows what appears worth keeping, changing, adding or leaving out.
- what your diet already covers, so you are not adding a capsule for something food is already handling
- which evidence-graded compounds are worth considering for your goals, and which were considered but left out
- what to keep, change or stop from what you already take, plus the order to introduce anything new
- how your medications and complete supplement stack fit together, with daily timing and a clear point for reassessment
The interaction check is one section of the full report. You also get the reasoning behind each recommendation and the evidence references used.
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