Everyday OTC
Is sleep aids (otc) FSA eligible?
Yes — OTC sleep aids with an active drug ingredient (like diphenhydramine) are FSA and HSA eligible.
Drug-based sleep aids such as ZzzQuil or Unisom qualify as OTC medicines. Melatonin sits in the supplement gray zone — many administrators reimburse it, some treat it as a dietary supplement requiring a letter of medical necessity. Check your plan before stocking up on melatonin specifically.
How to pay for it
- Tap your FSA/HSA debit card at checkout — most pharmacies, optical shops, and many online retailers take it directly.
- Buying online? FSA-only stores pre-filter their catalog to qualified items, so nothing in your cart bounces at checkout.
- No card on hand? Pay out of pocket and file a claim with your administrator — just keep the itemized receipt (a photo is fine).
Does the same answer apply to an HSA?
Yes. FSAs and HSAs share the same qualified-medical-expense rules (IRS Publication 502), so eligibility is identical. The difference is the deadline: FSA money is forfeited at the end of the plan year, while HSA money never expires.
Last reviewed 2026-06-11. Based on IRS Publication 502 and published IRS guidance. Not tax or medical advice — your plan administrator has the final say.