Product Information
GNP ALLERGY RELIEF 25 MG TAB is a generic product labeled by AmerisourceBergen, priced at $0.0370 per EA under NDC 46122044162. Its NADAC has been published 196 times since Jan 4, 2023.
Strength
25 mg/1
Manufacturer
AmerisourceBergenNDC
46122044162
Classification
Generic
Dosage Form
TABLET, FILM COATED
Route
ORAL
Effective Date
9/23/2026
Active Ingredients
DIPHENHYDRAMINE HYDROCHLORIDEApproval Type
OTC MONOGRAPH DRUG
FDA Application
M012On Market Since
3/2/1990
Pharmacological Classes
Price Statistics
The NADAC for GNP ALLERGY RELIEF 25 MG TAB has been published 196 times since Jan 4, 2023, and over the history we have for it it has risen 4.2%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.0370 per EA |
|---|---|
| All-time high | $0.0401 (Jul 12, 2023) |
| All-time low | $0.0299 (May 22, 2024) |
| 52-week high | $0.0384 |
| 52-week low | $0.0316 |
| Median price | $0.0359 |
| Average price | $0.0357 |
| Largest weekly change | -15.9% (May 22, 2024) |
| Weeks tracked | 196 |
| Tracking since | Jan 4, 2023 |
Generic Alternatives
The matcher finds 5 manufacturers offering a NADAC-published product with this drug's active ingredient and strength in a comparable dosage form (cheapest from each manufacturer, up to 10 shown below). Switching to the cheapest would cut per-unit acquisition cost by roughly 3% at current NADAC. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
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Manufacturer
AmerisourceBergen manufacturer profile
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Drug market
Diphenhydramine HCl market comparison
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Therapeutic class
Histamine-1 Receptor Antagonist class view
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Trend hub
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Guide
Understanding NADAC pricing
Use the explainer when you need context on how CMS publishes NADAC and how to interpret the number on this page.
Frequently asked questions
What is the NADAC price of GNP ALLERGY RELIEF 25 MG TAB?
The current National Average Drug Acquisition Cost (NADAC) for GNP ALLERGY RELIEF 25 MG TAB, manufactured by AmerisourceBergen, is $0.0370 per EA (NDC 46122044162), effective Sep 30, 2026.
How has the price of GNP ALLERGY RELIEF 25 MG TAB changed over time?
Over the history we have for it, the NADAC for GNP ALLERGY RELIEF 25 MG TAB has risen 4.2%. It has been tracked across 196 weekly CMS publications since Jan 4, 2023.
What are the highest and lowest recorded NADAC prices for GNP ALLERGY RELIEF 25 MG TAB?
Since Jan 4, 2023, the NADAC for GNP ALLERGY RELIEF 25 MG TAB has ranged from a low of $0.0299 (May 22, 2024) to a high of $0.0401 (Jul 12, 2023), with a median of $0.0359 per EA.
Are there cheaper alternatives to GNP ALLERGY RELIEF 25 MG TAB?
Yes. 5 manufacturers publish a NADAC-priced product with the same active ingredient and strength in a comparable dosage form. The lowest-priced option, SM ALLERGY (DIPHEN) 25 MG TAB, is $0.0358 per EA — about 3% below GNP ALLERGY RELIEF 25 MG TAB.
Who manufactures GNP ALLERGY RELIEF 25 MG TAB?
GNP ALLERGY RELIEF 25 MG TAB (NDC 46122044162) is labeled by AmerisourceBergen, and CMS classifies it as a generic product.