A Multicenter Prospective Observational Cohort Study Evaluating the Impact of Cancer-Directed Treatment and Medication Use, Including Cannabis Use, in Multiple Myeloma Patients

This study follows people newly diagnosed with multiple myeloma (a type of blood cancer) to understand how treatments and medication use — including cannabis — affect outcomes. It also surveys healthcare providers about their views on cannabis use in cancer care. **You may be eligible if...** - You are 18 or older and newly diagnosed with multiple myeloma - You can read and understand English - You have started first-line treatment and received up to four cycles - You are well enough to participate (ECOG performance score of 3 or less) **You may NOT be eligible if...** - You have completed five or more cycles of first-line treatment or started second-line therapy - You have another active cancer - You have already had a stem cell transplant - You cannot complete study activities Talk to your doctor to see if this trial is right for you.