I have been taking this generic pamine for a while, and now cannot get t refill unless I see the doctor again. But, as I told their office: Why do I need to see him when I'm feeling fine and have no problems. They did not say, but said to make an appointment. In the past, the doctor did not have me get a blood test or anything else, but only used his stethoscope to listen to by stomache and heart. I will be out of the pills tomorrow - so do I need to worry about any kind of withdrawl? I do have IBS the doctor has said.