Husband has frequent bouts of gas, bloating, lack of appetite, constipation (opioid) mostly between meals, and increasingly at dinnertime. He takes metformin (DMII), and low-dose morphine for a chronic pain condition in his feet caused by surgery about 15 years ago. He also takes Miralax daily. I need your feedback. P.S. His doctor just prescribed ranitidine 2x daily. Thank you for your input.