Since federal rules loosened for over-the-counter drugs and menstrual care products, participants rightly expect the FSA/HSA card to work at the pharmacy. Allergy season is when expectations meet the vitamin aisle.

Generally eligible without a prescription

Still usually not eligible

Why denials spike in spring

Warehouse clubs and online marketplaces bundle eligible and ineligible SKUs on one receipt. IIA merchants help, but they aren’t magic. Itemized receipts save everyone time.

If you send one seasonal nudge a year, April is a contender: short list of yes/no examples, link to your administrator’s eligible-expense tool, and a reminder to keep receipts when the card asks.