upon oral administration): [25] delirium dizziness diplopia blurred vision nystagmus altered hearing hypertension tachycardia hypersalivation nausea and vomiting erythema pain at injection site psychomimetic phenomenon euphoria dysphasia blunted affect psychomotor retardation vivid dreams nightmares impaired attention, memory and judgement illusions hallucinations altered body image Tonic - clonic movements are also reported