| 55111-729 | Allopurinol | Allopurinol | Dr. Reddy's Laboratories Limited | ANDA | Current |
| 55111-729 | Allopurinol | Allopurinol | Dr. Reddy's Laboratories Limited | ANDA | Current |
| 55700-879 | Allopurinol | Allopurinol | Quality Care Products, LLC | ANDA | Current |
| 60429-180 | Allopurinol | Allopurinol | Golden State Medical Supply, Inc. | ANDA | Current |
| 60429-180 | Allopurinol | Allopurinol | Golden State Medical Supply, Inc. | ANDA | Current |
| 68788-2115 | Allopurinol | Allopurinol | Preferred Pharmaceuticals, Inc. | ANDA | Current |
| 70934-882 | Allopurinol | Allopurinol | Denton Pharma, Inc. DBA Northwind Pharmaceuticals | ANDA | Current |
| 71335-1656 | Allopurinol | Allopurinol | Bryant Ranch Prepack | ANDA | Current |
| 71610-194 | Allopurinol | Allopurinol | Aphena Pharma Solutions - Tennessee, LLC | ANDA | Current |
| 71610-194 | Allopurinol | Allopurinol | Aphena Pharma Solutions - Tennessee, LLC | ANDA | Current |