Bevrs, I also take Hyosyamine. My GI told me to take it every day, am I understanding you correctly that you only take it as needed? Right now, I feel that I have to take it every day, it controls my gas as well as cramping. When I get myself regulated again (still recovering from abdominal surgery,and eating some things I probably should not, but, its that comfort food thing I've got going on right now), I'm thinking I might try to back off on it and take it a every other day. But, its that gas that keeps me on it. Hate that gas!!