Movicol, it is a laxative. What could possibly be wrong with someone who has been prescribed Movicol and has been taking the stuff for over a year? To me, that shows it is not very effective. A laxative should make you go , job done. Stop taking it. But the doctor has prescribed this magic powder to my friend and she takes it daily, religiously. My question is: What on earth could be wrong with someone if they have to be taking a laxative every day for over a year?