Hi sorry for the late reply. I have been using Pancreatin 2000 from Now. They are over the counter. They are about 20$ per 250 capsule bottle. All the stuff I read said that porcine pancreatine over the counter is effective and it has been my experience. My doctor and I discussed it and she said that I should continue using the brand since I have responded well to it. I have tried Veggie pancreatine and it does not help. Its almost like taking nothing at all.