| 1st line opiate withdrawal | 2nd line opiate withdrawal | ||
| Morphine sulphate | 182 (92.0%) | None required | 77 (39.0%) |
| Phenobarbitone | 7 (3.5%) | Phenobarbitone | 47 (23.7%) |
| Chloral hydrate | 5 (2.5%) | Chloral hydrate | 31 (15.7%) |
| Methadone | 3 (1.5%) | Chlorpromazine | 23 (11.6%) |
| Diazepam | 1 (0.5%) | Morphine sulphate | 11 (5.5%) |
| Benzodiazepine | 6 (3.0%) | ||
| Methadone | 3 (1.5%) | ||
| 1st line polydrug exposure | 2nd line polydrug exposure | ||
| Morphine sulphate | 137 (69.0%) | None required | 50 (25.3%) |
| Phenobarbitone | 28 (14.0%) | Phenobarbitone | 37 (18.7%) |
| Chloral hydrate | 9 (4.5%) | Chloral hydrate | 23 (11.6%) |
| Methadone | 4 (2.0%) | Chlorpromazine | 18 (9.1%) |
| Chlorpromazine | 3 (1.5%) | Benzodiazepines | 7 (3.5%) |
| Diazepam | 2 (1.0%) | Unanswered | 49 (24.7%) |
| Variable | 15 (8.0%) | ||