This study explores if **cannabidiol (CBD)**, a compound from the cannabis plant, can help people with **opioid addiction**. Opioid addiction is a condition where people become dependent on drugs that relieve pain, like methadone or buprenorphine. The study will compare different doses of CBD to a **placebo** (a pill that looks like medicine but has no active ingredients) to see if CBD can reduce the desire to use opioids and lessen anxiety.

Participants must be 18-65 years old, able to consent, and currently using methadone or buprenorphine for at least two weeks. They should not have severe mental health issues, be pregnant, or have certain health conditions.

• **Study Length**: Participants will take part in a **double-blind trial**, meaning neither they nor the researchers will know who receives CBD or placebo.
• **Visitation and Assessments**: Regular visits for lab tests and real-world symptom tracking are required.
• **Compensation**: Participation may include compensation, though details are not specified here.