| 0904-7041 | Allopurinol | Allopurinol | Major Pharmaceuticals | ANDA | Current |
| 0904-7041 | Allopurinol | Allopurinol | Major Pharmaceuticals | ANDA | Current |
| 55154-2338 | Allopurinol | Allopurinol | Cardinal Health | ANDA | Current |
| 55154-2338 | Allopurinol | Allopurinol | Cardinal Health 107, LLC | ANDA | Current |
| 68788-7542 | Allopurinol | Allopurinol | Preferred Pharmaceuticals, Inc. | ANDA | Current |
| 68788-7542 | Allopurinol | Allopurinol | Preferred Pharmaceuticals, Inc. | ANDA | Current |
| 70710-1209 | Allopurinol | Allopurinol | Zydus Pharmaceuticals (USA) Inc. | ANDA | Current |
| 70710-1209 | Allopurinol | Allopurinol | Zydus Pharmaceuticals (USA) Inc. | ANDA | Current |
| 70710-1209 | Allopurinol | Allopurinol | Zydus Pharmaceuticals (USA) Inc. | ANDA | Current |
| 70710-1210 | Allopurinol | Allopurinol | Zydus Pharmaceuticals (USA) Inc. | ANDA | Current |
| 70710-1210 | Allopurinol | Allopurinol | Zydus Pharmaceuticals (USA) Inc. | ANDA | Current |
| 70710-1210 | Allopurinol | Allopurinol | Zydus Pharmaceuticals (USA) Inc. | ANDA | Current |
| 70771-1126 | Allopurinol | Allopurinol | Zydus Lifesciences Limited | ANDA | Current |
| 70771-1126 | Allopurinol | Allopurinol | Cadila Healthcare Limited | ANDA | Current |
| 70771-1126 | Allopurinol | Allopurinol | Cadila Healthcare Limited | ANDA | Current |
| 70771-1127 | Allopurinol | Allopurinol | Zydus Lifesciences Limited | ANDA | Current |
| 70771-1127 | Allopurinol | Allopurinol | Cadila Healthcare Limited | ANDA | Current |
| 70771-1127 | Allopurinol | Allopurinol | Cadila Healthcare Limited | ANDA | Current |