Can I Take These?

Can You Take Calcium and Warfarin Together?

No documented interaction was identified between calcium and warfarin in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

What the interaction means

Warfarin's FDA label lists specific drugs, foods, and botanicals known to alter INR (including several minerals-adjacent items like large vitamin K intake) -- calcium is not named anywhere in that label. Calcium's own NIH fact sheet does not name warfarin.

No documented interaction was identified in the authoritative sources reviewed. This is not a guarantee that no interaction exists for every dose, formulation, or individual -- it means the sources checked did not document one.

Practical context

Both substances' own current authoritative sources were checked directly, in both directions.

What the sources say

Warfarin Sodium Tablets — FDA Prescribing Information — Amneal Pharmaceuticals LLC (via DailyMed, U.S. National Library of Medicine)Calcium — Consumer — NIH Office of Dietary Supplements

Last reviewed 2026-08-23

Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.

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