Yes. I've had it for 44 years. First drug was lomotil. It was awful . I had terrible side effects. Them I started to take metamucil. The recommended dosage was too much for me. It made me very constipated. I found that 1/2 teaspoon daily worked for me. I have felt better since trying it. this year, medication I take for blood pressure have made me constipated. I eat 2 to 4 prunes daily. This has helped keep my IBS under control. I had heard about metamucil from an interview with Lee Iacocca. He had been using it for years. If you try it, I highly suggest that you don't follow the instructions on the label. Take a little and build up gradually until you find the amount that works for you. Too much can cause you to have constipation.