Product Information
THEOPHYLLINE ER 600 MG TABLET is a generic product labeled by Westminster Pharmaceuticals LLC, priced at $1.3952 per EA under NDC 69367041501. Its NADAC has been published 38 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
600 mg/1
Manufacturer
Westminster Pharmaceuticals LLCNDC
69367041501
Classification
Generic
Dosage Form
TABLET, EXTENDED RELEASE
Route
ORAL
Effective Date
1/14/2026
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 600 MG TABLET has been published 38 times since Jan 14, 2026, and over the history we have for it it has held within roughly two percent of its current level. The table below summarizes its recorded NADAC range and movement.
| Current price | $1.3952 per EA |
|---|---|
| All-time high | $1.3952 (Sep 30, 2026) |
| All-time low | $1.3952 (Jan 14, 2026) |
| 52-week high | $1.3952 |
| 52-week low | $1.3952 |
| Median price | $1.3952 |
| Average price | $1.3952 |
| Largest weekly change | 0.0% (Jan 21, 2026) |
| Weeks tracked | 38 |
| 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
Continue researching this drug
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Manufacturer
Westminster Pharmaceuticals LLC manufacturer profile
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Drug market
Theophylline Anhydrous market comparison
Compare this molecule across participating manufacturers and inspect the broader market price spread.
Therapeutic class
Methylxanthine class view
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Trend hub
Latest market trends
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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 THEOPHYLLINE ER 600 MG TABLET?
The current National Average Drug Acquisition Cost (NADAC) for THEOPHYLLINE ER 600 MG TABLET, manufactured by Westminster Pharmaceuticals LLC, is $1.3952 per EA (NDC 69367041501), effective Sep 30, 2026.
How has the price of THEOPHYLLINE ER 600 MG TABLET changed over time?
Over the history we have for it, the NADAC for THEOPHYLLINE ER 600 MG TABLET has held within roughly two percent of its current level. It has been tracked across 38 weekly CMS publications since Jan 14, 2026.
What are the highest and lowest recorded NADAC prices for THEOPHYLLINE ER 600 MG TABLET?
Since Jan 14, 2026, the NADAC for THEOPHYLLINE ER 600 MG TABLET has ranged from a low of $1.3952 (Jan 14, 2026) to a high of $1.3952 (Sep 30, 2026), with a median of $1.3952 per EA.
Are there cheaper alternatives to THEOPHYLLINE ER 600 MG TABLET?
No other NADAC-published product currently shares the active ingredient and strength of THEOPHYLLINE ER 600 MG TABLET in a comparable dosage form, so no direct lower-cost alternative is listed.
Who manufactures THEOPHYLLINE ER 600 MG TABLET?
THEOPHYLLINE ER 600 MG TABLET (NDC 69367041501) is labeled by Westminster Pharmaceuticals LLC, and CMS classifies it as a generic product.