The proportion of patients with clinical symptoms/signs previously associated with mephedrone toxicity on presentation to the ED
| Clinical symptom/sign | Proportion of presentations |
| Agitation | 53.3% |
| Seizure | 20% |
| Vomiting | 13.3% |
| Discolouration of skin | 0% |
| Cool peripheries | 0% |
| Bruxism | 6.7% |
| Hyper-reflexia | 6.7% |
| Excessive sweating | 13.3% |
| Headache | 6.7% |
| Hypertension | 20% |
| Tachycardia | 40% |
| Palpitations | 13.3% |