Inclusion criteria:

• Older adults 50 years and older (50%≥65 years, 50% male)
• Non-cancer chronic musculoskeletal or neuropathic pain ³⁴ for 3 or more months ³⁵
• Pain intensity level in the past week greater than zero  (“0 = no pain” to “10 = most pain imaginable”) ³⁶
• Seeking MM treatment (for the MM group) OR having no intention to start MM for at least 6 months (for the comparison group)
• Availability of a smartphone. 

Exclusion criteria:

• Currently pregnant or nursing (by self-report)
• Urine test positive for THC
• Ever been a MM patient in Florida or another state and have used MM products regularly
• Used marijuana regularly (daily use) for at least one month in the past 10 years
• Current or history of substantial or severe substance use disorders ³⁷ assessed by the Drug Abuse Screening Test (DAST-10)³⁸
• Active cancer treatment, excluding certain cancers such as skin cancer dependent on the study physician’s decision
• Terminal illness
• Neurological conditions that impact ability to consent or complete study procedures (e.g., Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, head injury, stroke, and/or seizures)
• Active uncontrolled psychiatric disorders (e.g., schizophrenia, bipolar, excluding anxiety and depression).