Assessment | Screening | Baseline | Randomization | Weeks 1–3 | Medication-research visits | Non-medication visits | End of study visit (week 52) |
---|---|---|---|---|---|---|---|
Biological assessments | |||||||
 Urine pregnancy test | √ | √ | √ |  | √ |  | √ |
 Physical exam | √ |  |  |  | Week 24 |  | √ |
 Liver and kidney function, complete blood count (CBC) | √ |  |  |  | Weeks 4, 12, 24 |  | √ |
 Electrocardiogram (EKG) | √ |  |  |  | Week 24* |  |  |
 Urine toxicology test |  | √ |  | √ | √ | √ | √ |
 Blood HIV, hepatitis B (HBV), and hepatitis C (HCV) |  | √ |  |  | Week 24 |  | √ |
 Blood buprenorphine and norbuprenorphine |  | √ |  |  | Week 24 |  | √ |
Interviewer administered assessments | |||||||
 The MINI International Neuropsychic Interview (MINI) [39] | √ | √ |  |  |  |  | √ |
 Clinical Opiate Withdrawal Scale (COWS) [40] |  | * | √ | * | * | * | * |
Clinical Institute Withdrawal Scale (CIWA-Ar) [41] | √ | * | * | * | * | * | * |
 Patient Health Questionnaire-9 (PHQ-9, item 9 only) [42] | √ |  |  | √ | √ | √ | √ |
 Timeline follow-back [43] |  | √ |  | √ | √ | √ | √ |
 Concomitant medications |  | √ |  | √ | √ |  | √ |
 Opioid craving and overdose form |  | √ |  | √ | √ |  | √ |
 PEG3 (pain, enjoyment, general activity) |  | √ |  | √ | √ |  | √ |
 Service utilization review form (SURF) |  | √ |  |  | √ |  | √ |
 HIV risk behaviors |  | √ |  |  | Weeks 12, 24, 36 |  | √ |
 Criminal justice involvement |  | √ |  |  | Week 24 |  | √ |
 Alcohol Use Disorders Identification Test (AUDIT) [44] |  | √ |  |  |  |  | √ |
 Demographics and military history |  | √ |  |  |  |  |  |
 Modified substance use and medical history |  | √ |  |  |  |  |  |
 Columbia Suicide Severity Rating Scale (C-SSRS) [45] |  | √ |  |  |  |  |  |
 Study Medication Adherence Visual Analog Scale (VAS) |  |  |  | √ | √ |  | √ |
 Serious/adverse event |  | * | * | * | * | * | * |
Self-report assessments | |||||||
 Veterans Rand-12 |  | √ |  |  | √ |  | √ |
 Patient Health Questinnaire-9 (PHQ 9) |  | √ |  |  | Weeks 12, 24, 36 |  | √ |
 Posttraumatic Stress Disorder Checklist for DSM-5 (PCL-5) |  | √ |  |  | Weeks 12, 24, 36 |  | √ |
 COVID-19 Questionnaire |  | √ |  |  | Weeks 12, 24, 36 |  | √ |