| 0143-1261 | Isoniazid | Isoniazid | West-Ward Pharmaceuticals Corp | ANDA | Current |
| 0440-7655 | Isoniazid | Isoniazid | Liberty Pharmaceuticals, Inc. | ANDA | Current |
| 10544-087 | Isoniazid | Isoniazid | Blenheim Pharmacal, Inc. | ANDA | Current |
| 10544-121 | Isoniazid | Isoniazid | Blenheim Pharmacal, Inc. | ANDA | Current |
| 10544-218 | Isoniazid | Isoniazid | Blenheim Pharmacal, Inc. | ANDA | Current |
| 21695-627 | Isoniazid | Isoniazid | Rebel Distributors Corp | ANDA | Current |
| 52959-145 | Isoniazid | Isoniazid | H.J. Harkins Company, Inc. | ANDA | Current |
| 61748-013 | Isoniazid | Isoniazid | VersaPharm Incorporated | ANDA | Current |
| 68788-9116 | Isoniazid | Isoniazid | Preferred Pharmaceuticals, Inc. | ANDA | Current |