Product Information
THEOPHYLLINE ER 300 MG TABLET is a generic product labeled by Chartwell RX LLC, priced at $0.3324 per EA under NDC 62135045790. Its NADAC has been published 164 times since May 10, 2023.
The Low Outlier badge above means this manufacturer's average price in the Theophylline market falls below Q1 − 1.5·IQR across all competing manufacturers. We only apply this flag in markets with four or more competitors. Full definition: glossary → outlier.
Strength
300 mg/1
Manufacturer
Chartwell RX LLCNDC
62135045790
Classification
Generic
Dosage Form
TABLET, EXTENDED RELEASE
Route
ORAL
Last Updated
6/17/2026
Active Ingredients
THEOPHYLLINE ANHYDROUSApproval Type
Generic (ANDA)
FDA Application
ANDA089763On Market Since
6/27/2022
Pharmacological Classes
Price Statistics
The NADAC for THEOPHYLLINE ER 300 MG TABLET has been published 164 times since May 10, 2023, and over the history we have for it it has declined 84.8%. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.3324 per EA |
|---|---|
| All-time high | $2.6814 (Jun 14, 2023) |
| All-time low | $0.3196 (May 20, 2026) |
| 52-week high | $0.6132 |
| 52-week low | $0.3196 |
| Median price | $0.6295 |
| Average price | $1.0398 |
| Largest weekly change | +88.5% (Aug 21, 2024) |
| Weeks tracked | 164 |
| Tracking since | May 10, 2023 |
Generic Alternatives
The matcher finds 9 NADAC-published products sharing this drug's active ingredient, strength, and dosage form across 9 manufacturers (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.
Frequently asked questions
What is the NADAC price of THEOPHYLLINE ER 300 MG TABLET?
The current National Average Drug Acquisition Cost (NADAC) for THEOPHYLLINE ER 300 MG TABLET, manufactured by Chartwell RX LLC, is $0.3324 per EA (NDC 62135045790), effective Jun 24, 2026.
How has the price of THEOPHYLLINE ER 300 MG TABLET changed over time?
Over the history we have for it, the NADAC for THEOPHYLLINE ER 300 MG TABLET has declined 84.8%. It has been tracked across 164 weekly CMS publications since May 10, 2023.
What are the highest and lowest recorded NADAC prices for THEOPHYLLINE ER 300 MG TABLET?
Since May 10, 2023, the NADAC for THEOPHYLLINE ER 300 MG TABLET has ranged from a low of $0.3196 (May 20, 2026) to a high of $2.6814 (Jun 14, 2023), with a median of $0.6295 per EA.
Are there cheaper alternatives to THEOPHYLLINE ER 300 MG TABLET?
9 NADAC-published products share the same active ingredient, strength, and dosage form as THEOPHYLLINE ER 300 MG TABLET, but none are currently priced below it.
Who manufactures THEOPHYLLINE ER 300 MG TABLET?
THEOPHYLLINE ER 300 MG TABLET (NDC 62135045790) is labeled by Chartwell RX LLC, and CMS classifies it as a generic product.
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