Product Information
SM ALLERGY (DIPHEN) 25 MG TAB is a generic product labeled by Strategic Sourcing Services LLC, priced at $0.0358 per EA under NDC 70677000301. Its NADAC has been published 355 times since Nov 14, 2018.
Strength
25 mg/1
Manufacturer
Strategic Sourcing Services LLCNDC
70677000301
Classification
Generic
Dosage Form
TABLET, FILM COATED
Route
ORAL
Effective Date
8/20/2025
Active Ingredients
DIPHENHYDRAMINE HYDROCHLORIDEApproval Type
OTC MONOGRAPH DRUG
FDA Application
M012On Market Since
3/2/1990
Pharmacological Classes
Price Statistics
The NADAC for SM ALLERGY (DIPHEN) 25 MG TAB has been published 355 times since Nov 14, 2018, and over the history we have for it it has risen 20.0%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.0358 per EA |
|---|---|
| All-time high | $0.0401 (Jul 12, 2023) |
| All-time low | $0.0299 (May 22, 2024) |
| 52-week high | $0.0358 |
| 52-week low | $0.0358 |
| Median price | $0.0353 |
| Average price | $0.0350 |
| Largest weekly change | -15.9% (May 22, 2024) |
| Weeks tracked | 355 |
| Tracking since | Nov 14, 2018 |
1W
N/A
1M
N/A
3M
N/A
6M
N/A
1Y
0.0%
3Y
-6.3%
5Y
-0.7%
All
+20.0%
Last surveyed Aug 27, 2025 — this NDC no longer appears in the current weekly NADAC file.
Generic Alternatives
The matcher finds 6 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). None of the shown alternatives sit below the current price. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
Frequently asked questions
What is the NADAC price of SM ALLERGY (DIPHEN) 25 MG TAB?
The current National Average Drug Acquisition Cost (NADAC) for SM ALLERGY (DIPHEN) 25 MG TAB, manufactured by Strategic Sourcing Services LLC, is $0.0358 per EA (NDC 70677000301), effective Aug 27, 2025.
How has the price of SM ALLERGY (DIPHEN) 25 MG TAB changed over time?
Over the history we have for it, the NADAC for SM ALLERGY (DIPHEN) 25 MG TAB has risen 20.0%. It has been tracked across 355 weekly CMS publications since Nov 14, 2018.
What are the highest and lowest recorded NADAC prices for SM ALLERGY (DIPHEN) 25 MG TAB?
Since Nov 14, 2018, the NADAC for SM ALLERGY (DIPHEN) 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 $0.0353 per EA.
Are there cheaper alternatives to SM ALLERGY (DIPHEN) 25 MG TAB?
6 manufacturers publish a NADAC-priced product with the same active ingredient and strength as SM ALLERGY (DIPHEN) 25 MG TAB in a comparable dosage form, but none are currently priced below it.
Who manufactures SM ALLERGY (DIPHEN) 25 MG TAB?
SM ALLERGY (DIPHEN) 25 MG TAB (NDC 70677000301) is labeled by Strategic Sourcing Services LLC, and CMS classifies it as a generic product.