Randomized Placebo-controlled Trial to Determine the Biological Signature of Cannabidiol as a Treatment for Social Anxiety Disorder (R61)

Exclusion criteria

• 1. Known allergy or hypersensitivity to CBD or any of the excipients 2. A lifetime history of bipolar disorder, schizophrenia, psychosis, or delusional disorders; obsessive-compulsive disorder or an eating disorder in the past 12 months; neurocognitive disorders, intellectual disabilities, communication disorders or other cognitive dysfunction that could interfere with capacity to engage in therapy or complete study procedures; major depressive disorder, substance or alcohol use disorder (other than nicotine) in the last 6 months. 3. Positive urine toxicology for illicit drugs and/or cannabinoids, or self-reported use of CBD, THC or marijuana in the past 4 weeks prior to baseline 4. Patients with significant suicidal ideation (assessed by CSSRS SI score greater than 2) or who have enacted suicidal behaviors within 6 months prior to intake will be excluded from study participation and referred for appropriate clinical intervention. 5. Patients must be free of concurrent psychotropic medications including antipsychotics, anticonvulsants, benzodiazepines, and opioids, and medications that both have a narrow therapeutic index as determined by the study clinician, and are also substrates or moderate to strong inhibitors of CYP2C9, CYP2C19, CYP3A5, CYP3A7, UGT1A9, UGT2B7, CYP2C8, CYP1A2 or CYP2B6, or are strong inducers of CYP3A4 or CYP2C19, for at least 4 weeks prior to initiation of randomized treatment. 6. Inability to understand study procedures or informed consent process, or significant personality dysfunction likely to interfere with study participation (assessed during the clinical interview) or inability to comply with study procedures (such as planned extended travel) assessed on clinical interview. 7. Serious current unstable medical illness, or a condition for which hospitalization may be likely within the next year as assessed by medical history and physical exam. If any questions about medical safety emerge with screening procedures, consent will be formally obtained to contact patient's PCP in order to determine whether any medical concerns making participation unsafe or not feasible (such as need for extended inpatient care or medications with concern for significant drug interactions and/or safe utilization of CBD) are present. 8. Clinically significant abnormal physical examination, vital signs or 12 lead ECG at screening. Clinically significant abnormal values for hematology, clinical chemistry, or urinalysis at screening. 9. Pregnant women (to be ruled out by urine ß-HCG) and women of childbearing potential who are not using medically accepted forms of contraception (such as IUD, oral contraceptives, barrier devices, condoms and foam, or implanted progesterone rods stabilized for at least 3 months). Men must also be using at least one medically accepted form of contraception. 10. Any concurrent psychotherapy initiated within 3 months of baseline, or ongoing psychotherapy of any duration directed specifically toward treatment of SAD. Prohibited psychotherapy includes CBT, DBT, ACT, mindfulness-based approaches or psychodynamic therapy focusing on exploring specific, dynamic causes of the SAD symptomatology and providing management skills. General supportive therapy initiated greater than 3 months prior is acceptable. 11. Has received an investigational drug or used an invasive investigational medical device within 1 month or within a period less than 10 times the drug's half-life, whichever is longer, before Day 1 12. Patients with a history of head trauma causing loss of consciousness, seizure or ongoing cognitive impairment. 13. Contraindications for MRI including metal implants, surgical clips, probability of metal fragments, or braces that are prohibited due to severe risk of injury. 14. Left-handed 15. A prior history of a diagnosis of moderate to severe hepatic dysfunction or current bilirubin \>=1.5X ULN and/or ALT or AST as 2X ULN, and/or if clinically significant signs and symptoms that are together suggestive of significant hepatic injury (i.e., nausea, vomiting, right upper quadrant pain, anorexia, fatigue, jaundice, dark urine).