Can I Take These?

Can You Take Caffeine and Metformin Together?

No documented interaction was identified between caffeine and metformin in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

See the full Caffeine page and Metformin page for other reviewed interactions and reference information.

What the interaction means

MedlinePlus's caffeine page does not mention metformin. Metformin's FDA label names ~19 drugs/classes affecting glycemic control or lactic-acidosis risk (carbonic anhydrase inhibitors, ranolazine, alcohol, diuretics, corticosteroids, and more) -- caffeine is not among them.

No documented interaction between Caffeine and Metformin 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

Caffeine's MedlinePlus page and metformin's FDA label were checked directly, full text, in both directions. Caffeine is not among metformin's named glycemic-control or clearance concerns.

What the sources say

Caffeine — MedlinePlus, U.S. National Library of MedicineMetformin Hydrochloride Tablets, USP — FDA Prescribing Information — Granules Pharmaceuticals Inc. (via DailyMed, U.S. National Library of Medicine)

Last reviewed 2026-08-25

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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