"My dad is on morphine for pain and is being treated with Velcade and Deratumamab. I know it’s best to start slow with low dosage and higher CBD:THC ratio, but can you provide anything more specific? His oncology team has no experience with CDB, only THC."
I would encourage a 1:1 tincture to reduce the morphine but you must be sure it is ok with dad. Some people have no intention of changing what they are doing and you need to be okay with his wishes. The higher CBD should help with pain relief but it seems to take about 3 weeks to get maximum benefit from a High CBD/ Low THC.