try searching for drug names on www.rxlist.com I just looked a levsin and bentyl there and it gave a listing of the inactive ingredients.HTHK------------------I have no financial, academic, or any other stake in any commercial product mentioned by me.And from the as if IBS isn't enough of a worry file...from New Scientist's Feedback column: FINALLY, we feel it is time to bring to an end our theme of notes on toilet doors. But we can't resist passing on one last example, photographed on the door of a ladies' loo in the Sequoia National Park in California by reader Liz Masterman: "Please keep door closed to discourage bears from entering."