Product Information
THEOPHYLLINE ER 400 MG TABLET is a generic product labeled by Westminster Pharmaceuticals LLC, priced at $1.0151 per EA under NDC 69367041401. Its NADAC has been published 32 times since Jan 14, 2026.
FDA first approved this application on Apr 21, 2006. Its Orange Book therapeutic-equivalence code is AB — FDA rates it therapeutically equivalent to (substitutable for) its reference product.
Strength
400 mg/1
Manufacturer
Westminster Pharmaceuticals LLCNDC
69367041401
Classification
Generic
Dosage Form
TABLET, EXTENDED RELEASE
Route
ORAL
Effective Date
8/19/2026
Active Ingredients
THEOPHYLLINE ANHYDROUSApproval Type
Generic (ANDA)
FDA Application
ANDA040560FDA Approved
4/21/2006
TE Code
AB
On Market Since
11/25/2025
Pharmacological Classes
Price Statistics
The NADAC for THEOPHYLLINE ER 400 MG TABLET has been published 32 times since Jan 14, 2026, and over the history we have for it it has risen 10.9%. The table below summarizes its recorded NADAC range and movement.
| Current price | $1.0151 per EA |
|---|---|
| All-time high | $1.0376 (Apr 15, 2026) |
| All-time low | $0.9123 (Apr 22, 2026) |
| 52-week high | $1.0376 |
| 52-week low | $0.9123 |
| Median price | $0.9576 |
| Average price | $0.9700 |
| Largest weekly change | -12.1% (Apr 22, 2026) |
| Weeks tracked | 32 |
| Tracking since | Jan 14, 2026 |
Generic Alternatives
No other NADAC-published product shares this drug's active ingredient and strength in a comparable dosage form. Compare the broader picture on the Theophylline Anhydrous market page.
Lowest-Cost Alternatives
No alternatives available
Related Drugs
Same classification
Frequently asked questions
What is the NADAC price of THEOPHYLLINE ER 400 MG TABLET?
The current National Average Drug Acquisition Cost (NADAC) for THEOPHYLLINE ER 400 MG TABLET, manufactured by Westminster Pharmaceuticals LLC, is $1.0151 per EA (NDC 69367041401), effective Aug 19, 2026.
How has the price of THEOPHYLLINE ER 400 MG TABLET changed over time?
Over the history we have for it, the NADAC for THEOPHYLLINE ER 400 MG TABLET has risen 10.9%. It has been tracked across 32 weekly CMS publications since Jan 14, 2026.
What are the highest and lowest recorded NADAC prices for THEOPHYLLINE ER 400 MG TABLET?
Since Jan 14, 2026, the NADAC for THEOPHYLLINE ER 400 MG TABLET has ranged from a low of $0.9123 (Apr 22, 2026) to a high of $1.0376 (Apr 15, 2026), with a median of $0.9576 per EA.
Are there cheaper alternatives to THEOPHYLLINE ER 400 MG TABLET?
No other NADAC-published product currently shares the active ingredient and strength of THEOPHYLLINE ER 400 MG TABLET in a comparable dosage form, so no direct lower-cost alternative is listed.
Who manufactures THEOPHYLLINE ER 400 MG TABLET?
THEOPHYLLINE ER 400 MG TABLET (NDC 69367041401) is labeled by Westminster Pharmaceuticals LLC, and CMS classifies it as a generic product.