Supplement · Not recommended

Xylitol and medications.

Not yet catalogued in the Distil interactions database. We surface that distinction explicitly.

Xylitol is in the Distil database but is not recommended: it is graded for none of the goals we score, so a Distil report never adds it to a stack. The page below lists every medication we have explicitly assessed it against.

Xylitol is a sugar alcohol used mainly for dental health, where the evidence is Grade C and honestly emerging. It inhibits Streptococcus mutans, the main caries-causing bacterium, reduces plaque, supports enamel remineralisation, relieves dry mouth, and reduces oral Candida. The mechanism depends on frequency of contact rather than total dose, so the usual approach is 5 to 10g a day split across at least four to six exposures through gum, lozenges, or granules. The honest limit sits on the outcome that matters most: the 2015 Cochrane review rated the caries-prevention evidence low to very low quality, and the single trial in adults could not tell whether xylitol lozenges reduced or increased cavities, so the consistent human data covers bacterial and plaque reduction rather than proven cavity prevention in adults. On interactions, xylitol is unusually clean: no significant drug interactions are recognised. The one critical safety point is unrelated to medication. Xylitol is fatal to dogs even in small amounts, so any household with a dog must store and use it carefully. Side effects in people are limited to loose stools well above the supplement range. A low-risk adjunct to brushing and flossing rather than a proven shield against cavities, with the dog warning being the part most people overlook.

We have not yet completed an explicit assessment of medications for Xylitol in the Distil interactions database. We surface this distinction deliberately: the Distil checker tells you when we have explicitly assessed a pair and when we have not, because both are useful information. If you take Xylitol alongside a medication, the checker below will surface anything already in our database, and the missing-item form at the bottom of the page routes uncatalogued pairs into our next curation pass.

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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For adults over 18. This tool gives evidence-graded information, not medical advice. Always discuss changes with your GP or pharmacist, especially if you take any medication, are pregnant, breastfeeding, or have a serious health condition.

Your supplements

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Your medications

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How the checker decides

Every result has a source

Each pair we have assessed is cited to a published study (PMID) or the British National Formulary, so you can read the source yourself.

Four kinds of answer

Severe, caution, no known interaction, and not yet assessed. A pair we have not assessed is never shown as clear.

Severe
Caution
No known interaction
Not yet assessed

Nothing in our data is not a clearance

When nothing in our data records a problem with a pair, the result says no known interaction at typical doses, which is not a clearance: your pharmacist or GP can check the pair against your full medical history.

Read the full methodology

The full report

A 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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Distil's interactions database is reviewed and updated every quarter. We grade evidence transparently and publish our methodology, including every database change, at /about/methodology. This tool is information, not a substitute for clinical judgement. If you take medication and supplements together, your GP or pharmacist can review your full regimen against your medical history. If you want a full personalised stack reasoned against this same database, the Distil report is the next step up.