Is he getting medical care through the military or civilian hospitals? There's a huge difference in quality as well as the fact that you cannot sue if a practitioner has dropped the ball.
NAD, but both of my parents had metastatic lung cancer. There was literally zero red tape in getting them pain meds. My father passed 7 years ago, and was getting fentanyl patches, morphine, and Norco. My mom just passed 3 months ago and she had morphine and OxyContin. Your husbands pain should be treated.