[{"arm_notes": "nan", "treatment_id": null, "treatment_name": "Nebulized Fentanyl", "treatment_type": "Drug", "pharmacological_treatment": "Pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Nebulized Fentanyl", "treatment_type": "Drug", "pharmacological_treatment": "Pharmacological treatment"}]

[{"arm_notes": "nebulized", "treatment_id": 508, "treatment_name": "Fentanyl", "treatment_type": "Central nervous system agents", "pharmacological_treatment": "Pharmacological treatment"}, {"arm_notes": "", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]