Melatonin is a dietary supplement, so it's only eligible with an LMN for a diagnosed sleep condition.
IRS Pub. 502 (supplement rule); LMN pathway
A licensed provider documents that this expense treats or mitigates a specific diagnosed condition, before you buy. Keep the letter with your receipt — it's your audit defense.
Vault the receipt in Candor and reimburse yourself tax-free — this year or in 20 years. No deadline (IRS Notice 2004-50, Q&A 39).
Start your shoebox — freeInformational only — not tax, legal, or medical advice. Consult a qualified tax professional about your situation. Rules version 2026-07-16, last verified July 2026.