Can I Take These?

Can You Take Levothyroxine and Melatonin Together?

No documented interaction was identified between levothyroxine and melatonin in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

What the interaction means

Levothyroxine's FDA label's only "melatonin" occurrence is "MELATONIN RECEPTOR AGONIST" inside its generic pharmacologic-class taxonomy dropdown, not a prose interaction statement. NCCIH's melatonin page does not mention levothyroxine.

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, full text, in both directions; the taxonomy-list mention was deliberately not treated as a real interaction claim.

What the sources say

Levothyroxine Sodium Capsules — FDA Prescribing Information — YARAL Pharma, Inc. (via DailyMed, U.S. National Library of Medicine)Melatonin: What You Need To Know — National Center for Complementary and Integrative Health (NIH)

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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