Antihistamine
An Established Pharmacologic Class (EPC) in the FDA NDC Directory: the class FDA records for a product in its PHARM_CLASSES field.
In the NADAC file of 2026-10-14
29 products in the NADAC file of 2026-10-14 have an NDC that FDA lists in this class, covering 14 nonproprietary names as FDA writes them. 9 of them have a Medicare figure on OpenBill.
Being in one class means FDA describes the drugs’ pharmacology the same way. It does not mean one can replace another; that is a question for your prescriber.
Prices per unit: CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · as of 2026-10-14 · retrieved 2026-10-17. Classes: FDA NDC Directory · ndctext.zip · as of 2026-10-16.
The products, with what pharmacies pay per unit
- ALL-NITE COLD-FLU RELIEF LIQ
- BENZTROPINE MES 0.5 MG TAB
- BENZTROPINE MES 1 MG TABLET
- BENZTROPINE MES 2 MG TABLET
- BONJESTA ER 20-20 MG TABLET
- DICLEGIS DR 10-10 MG TABLET
- DOXYLAMINE-PYRIDOXINE 10-10 MG
- FT NIGHTTIME COLD-FLU RLF LIQ
- FT SLEEP AID 25 MG TABLET
- GNP NIGHTTIME SLEEP 25 MG TAB
- GS NIGHTTIME COLD-FLU LIQUID
- GS NIGHTTIME COLD-FLU SOFTGEL
- GS SEVERE COLD-FLU NIGHTTME LQ
- GS SLEEP AID 25 MG TABLET
- GS SLEEP AID ULTRA 25 MG TAB
- HYDROXYZINE 10 MG/5 ML SOLN
- HYDROXYZINE 10 MG/5 ML SYRUP
- HYDROXYZINE HCL 10 MG TABLET
- HYDROXYZINE HCL 25 MG TABLET
- HYDROXYZINE HCL 50 MG TABLET
- HYDROXYZINE PAM 100 MG CAP
- HYDROXYZINE PAM 25 MG CAP
- HYDROXYZINE PAM 50 MG CAP
- NIGHT TIME COLD-FLU LIQUID
- NIGHT TIME COLD-FLU SOFTGEL
- NIGHTTIME COLD-FLU RLF SFTGL
- POLY HIST FORTE 10.5-10 MG TAB
- QC NIGHTTIME COLD-FLU SOFTGEL
- SLEEP AID 25 MG TABLET
How to read these prices
OpenBill holds every page to these five rules, written by the project’s owner and quoted word for word:
- A price is a range to expect, never a quote.
- Medicare's price is not your price. Say so on every screen that shows it.
- State which dataset and which effective date produced every figure.
- If a source is stale or a file is empty, show that rather than a zero.
- Disclaimer footer: not medical advice, no warranty, other people's data can be wrong.