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

See the full Calcium page and Warfarin page for other reviewed interactions and reference information.

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 between Calcium and Warfarin 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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