UK Fatal Toxicity Reports for sulphalsalazine from July 1963–July 2000 (courtesy of the Medicines Control Agency)
| Toxic effect | Number | Notes |
| Cardiovascular | 4 | |
| Cerebrovascular | 1 | |
| Congenital malformation | 2 | |
| Haemopoetic | 42 | 13 agranulocytosis, 10 aplastic anaemia, 5 neutropenia, 5 pancytopenia, 4 leucopenia , 2 platelet related disorders, 2 bone marrow depression and 1 folate deficiency anaemia |
| Hepatobiliary | 8 | Liver failure/hepatitis |
| Neurological | 1 | |
| Neoplasms | 2 | |
| Abortions/stillbirth | 4 | |
| Respiratory | 2 | 1 Pneumonitis, 1 pulmonary fibrosis |
| Skin | 2 | Epidermal necrolysis |
| Total | 68 |