| 10544-911 | Allopurinol | Allopurinol | Blenheim Pharmacal, Inc. | ANDA | Current |
| 43353-088 | Allopurinol | Allopurinol | Aphena Pharma Solutions - Tennessee, LLC | ANDA | Current |
| 43353-088 | Allopurinol | Allopurinol | Aphena Pharma Solutions - Tennessee, LLC | ANDA | Current |
| 55111-730 | Allopurinol | Allopurinol | Dr. Reddy's Laboratories Limited | ANDA | Current |
| 55111-730 | Allopurinol | Allopurinol | Dr. Reddy's Laboratories Limited | ANDA | Current |
| 60429-181 | Allopurinol | Allopurinol | Golden State Medical Supply, Inc. | ANDA | Current |
| 68788-0603 | Allopurinol | Allopurinol | Preferred Pharmaceuticals, Inc. | ANDA | Current |
| 71610-064 | Allopurinol | Allopurinol | Aphena Pharma Solutions - Tennessee, LLC | ANDA | Current |
| 71610-064 | Allopurinol | Allopurinol | Aphena Pharma Solutions - Tennessee, LLC | ANDA | Current |