Rose,I think people could make more viable suggestions to you if you describe what your physical pain is and what immune disorder you have that is causing it. Here’s a cautionary tale about Vicodin: My best friend has chronic pain in her hands from a malpractice episode years ago w an iv at a hospital. She admits she is addicted to Vicodin. It has started to cause ongoing hairline cracks in her spine from osteoporosis. You sound awfully desperate on this issue, and getting extra by saying your bf needs them makes you sound like you already are addicted. No preaching? People who really care about you are going to express some concerns here.
You have a very stressful situation. The last thing you need is an addiction. I would suggest you try some non THC cannabis products. I have pain from frozen shoulder and tho I take the gummies for anxiety, I have found that they loosen up my muscles and thereby help with the pain. Hugs to you as a fellow caregiver.