[{"arm_notes": "nan", "treatment_id": 855, "treatment_name": "Naltrexone", "treatment_type": "Central nervous system agents", "pharmacological_treatment": "Pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": null, "treatment_name": "Naltrexone;Placebo;Ketamine", "treatment_type": "Drug;Other;Drug", "pharmacological_treatment": "Pharmacological treatment"}, {"arm_notes": "nan", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]

[{"arm_notes": "Ketamine will be given as a rescue agent should a participant progress.", "treatment_id": 855, "treatment_name": "Naltrexone", "treatment_type": "Central nervous system agents", "pharmacological_treatment": "Pharmacological treatment"}, {"arm_notes": "Ketamine will be given as a rescue agent should a participant progress.", "treatment_id": 2187, "treatment_name": "Placebo", "treatment_type": "Placebo", "pharmacological_treatment": "Placebo"}]