Morphine and its metabolites pre- and one hour post-topical morphine (case 1)
| Metabolite | Limit of detection (ng/ml) | Pre-gel level (ng/ml) | 1 hour post-gel level (ng/ml) |
|---|---|---|---|
| Morphine | 5 | <5 | 8 |
| Morphine-3-glucuronide | 60 | 156 | 174 |
| Morphine-6-glucuronide | 10 | 24 | 37 |