I just opened a kitchen cabinet and saw the Metamucil he recently started taking. He's always seemed to have bathroom issues and said that that Metamucil has really helped. When I saw it today though, I got a jolt of realization and wondered if Xanax causes constipation. I looked it up and it is on the list of side effects. Maybe I am just crazy today and am making too many connections that really don't have any relation to the problem.