| 10135-604 | Theophylline | Theophylline Anhydrous | Marlex Pharmaceuticals Inc | ANDA | Current |
| 10135-604 | Theophylline | Theophylline Anhydrous | Marlex Pharmaceuticals Inc | ANDA | Current |
| 54838-556 | Theophylline | Theophylline | Lannett Company, Inc. | ANDA | Current |
| 54838-556 | Theophylline | Theophylline | Lannett Company, Inc. | ANDA | Current |
| 54838-556 | Theophylline | Theophylline | Lannett Company, Inc. | ANDA | Current |
| 54838-556 | Theophylline | Theophylline | Lannett Company, Inc. | ANDA | Current |
| 60687-258 | Theophylline | Theophylline | American Health Packaging | ANDA | Current |
| 60687-258 | Theophylline | Theophylline | American Health Packaging | ANDA | Current |
| 60687-258 | Theophylline | Theophylline | American Health Packaging | ANDA | Current |
| 62135-556 | Theophylline | Theophylline | Chartwell RX, LLC | ANDA | Current |