Quick answers
- What is Theo-24?
- Theo-24 is a brand name of Theophylline, a prescription medicine. The FDA NDC Directory lists 4 Theo-24 products in 4 strengths and forms.
- Who makes Theo-24?
- ENDO USA, Inc. lists 3 of the 4 Theo-24 products in the FDA NDC Directory.
- Is there a generic or store brand of Theo-24?
- Other products of Theophylline are listed with the FDA, but none in exactly the same strength and form as a Theo-24 product.
- What do pharmacies pay for Theo-24?
- CMS lists a National Average Drug Acquisition Cost (NADAC) for 4 Theo-24 strengths and forms (see the table below). That is what pharmacies pay to buy it, not what you pay: your price depends on your insurance and your pharmacy.
- Has Theo-24 been recalled?
- No recall linked to Theo-24 products (by their NDC code or label) appears in the FDA enforcement reports we use.
What Theo-24 is
Each Theo-24 product as listed in the FDA NDC Directory, by active ingredient, strength and form, with its official label. “Same medicine, other names” counts the other products with exactly the same active ingredients, strength and form (generic versions, store brands and other brands); inactive ingredients can differ.
Theophylline · prescription medicine
| Strength and form | Product names | Same medicine, other names | Label |
|---|---|---|---|
| theophylline anhydrous 100 mg capsule, extended release (oral) | Theo-24 | None listed | DailyMed |
| theophylline anhydrous 200 mg capsule, extended release (oral) | Theo-24 | None listed | DailyMed |
| theophylline anhydrous 300 mg capsule, extended release (oral) | Theo-24 | None listed | DailyMed |
| theophylline anhydrous 400 mg capsule, extended release (oral) | Theo-24 | None listed | DailyMed |
Its page lists every product and company, the FDA label’s uses and boxed warning, approvals, shortages and recalls: Theophylline →
FDA approval
- ANDA: Abbreviated New Drug Application: how a generic version is approved.
| Application | Holder | First approved | Products |
|---|---|---|---|
| ANDA087943 | Endo Operations | August 22, 1983 | 1 |
| ANDA081034 | — | Date not on file | 1 |
| ANDA087942 | — | Date not on file | 1 |
| ANDA087944 | — | Date not on file | 1 |
What pharmacies pay (NADAC)
The National Average Drug Acquisition Cost (NADAC) is the average price U.S. retail pharmacies paid to buy one unit of a medicine (one tablet, one mL or one gram), from a monthly survey of pharmacy invoices by the Centers for Medicare & Medicaid Services (CMS). State Medicaid programs use it to pay pharmacies.
This is not the price you pay. What you pay depends on your insurance (copay or coinsurance), your pharmacy and any discounts, and pharmacies also charge for filling a prescription. Ask your pharmacist or your health plan what your price will be.
| Strength and form | Generic or brand | Pharmacies pay |
|---|---|---|
| theophylline anhydrous 100 mg capsule, extended release | Brand: Theo-24 | $3.82 per capsule |
| theophylline anhydrous 200 mg capsule, extended release | Brand: Theo-24 | $5.67 per capsule |
| theophylline anhydrous 300 mg capsule, extended release | Brand: Theo-24 | $6.95 per capsule |
| theophylline anhydrous 400 mg capsule, extended release | Brand: Theo-24 | $9.79 per capsule |
NADAC list of November 4, 2026; these prices took effect between January 1, 2026 and October 21, 2026. Shown only where a package’s NDC code matches the NADAC list exactly, and only for that exact strength and form: nothing is averaged across strengths. Strengths and forms not listed here have no NADAC price.
Source: NADAC (National Average Drug Acquisition Cost) 2026, data.medicaid.gov (CMS) →
Companies that list Theo-24
The company named on the package (holder, repackager or distributor), as listed in the FDA NDC Directory, with its number of Theo-24 products.
- ENDO USA, Inc.4 products
Recalls
No recall linked to Theo-24 products (by their NDC code or label) appears in the FDA enforcement reports.
Sources
- NDC Directory (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- Drugs@FDA (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- Drug labeling (SPL, openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- Drug recall enforcement reports (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 27, 2026, retrieved October 31, 2026
- NADAC (National Average Drug Acquisition Cost) 2026 — Centers for Medicare & Medicaid Services (CMS), data.medicaid.gov, list of November 4, 2026, retrieved November 7, 2026
Which names get a brand page: a name the NDC Directory lists for a medicine, held by one company (the FDA application holder, or the company named on most of its products), that is not just a description, and that is not the only product of its medicine.