Per cent distribution of the assay percentage of active ingredient in purchased ampoules of oxytocin and ergometrine
| Assay percentage | Oxytocin 10 IU (%) | Ergometrine 0.5 mg (%) |
| 0 | 0 | 1.8 |
| 1–39 | 23.9 | 23.7 |
| 40–59 | 8.7 | 50.8 |
| 60–89 | 41.3 | 21.9 |
| 90–110 | 26.1 | 0 |
| >110 | 0 | 1.8 |
| Total % (N) | 100 (46) | 100 (55) |
| Median % | 64 | 50.5 |
| Per cent expired | 4.3 (2) | 0 (0) |