| Drug | Type | Acute Effects | Medical Complications |
| Ketamine | Dissociativeanaesthetic | Sedation, delirium, hallucinations | Respiratory depression,dysrhythmias, seizures |
| Ecstasy | Serotonergiceffects | Feelings of warmth, empathy | Dehydration (common at "raves"); hyperthermia |
| Phencyclidine | Dissociativeanaesthetic | Delirium, delusions, hallucinations, sedation | Seizures, hyperpyrexia, hypertension, coma,rhabdomyolysis, violence |
| Gamma Hydroxybutyrate (GHB) |
GABA effects (neuroinhibitory) | Sedation, disinhibition, delirium | Prolonged, severe withdrawal in daily users: tremor, psychosis, delirium, seizures |
| Drug | Chronic Effects | Fetal Effects |
| Ketamine | Unknown | Possible neuro-developmental damage* |
| Ecstasy | Long-term memory impairment | Possible cardiac, skeletal abnormalities |
| Phencyclidine | Memory impairment, depression | Possible neuro-developmental damage* |
| Gamma Hydroxybutyrate (GHB) |
Coma, respiratory depression | Possible neuro-developmental damage* |
