Can I Take These?

Can You Take Levothyroxine and Omega-3 / Fish Oil Together?

No documented interaction was identified between levothyroxine and omega-3 / fish oil in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

See the full Levothyroxine page and Omega-3 / Fish Oil page for other reviewed interactions and reference information.

What the interaction means

Omega-3's dedicated Interactions with Medications section names only warfarin and similar anticoagulants; levothyroxine does not appear anywhere in either omega-3 fact sheet. This repository's existing levothyroxine content, built from its own FDA label, contains no mention of omega-3 or fish oil.

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

Omega-3's side was checked directly this pass (both fact sheets, full text). Levothyroxine's own FDA label was not independently re-fetched this pass; this relies on a repository grep of previously-verified levothyroxine content, which found no mention of omega-3/fish oil.

What the sources say

Omega-3 Fatty Acids - Health Professional Fact Sheet — NIH Office of Dietary SupplementsOmega-3 Fatty Acids - Consumer — NIH Office of Dietary Supplements

Last reviewed 2026-08-24

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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