Alli weight gain

Patient: I am currently using ALLI. I am following a very healthy diet and taking exercise daily but Im gradually gaining weight. I’ve always been constipated, could this be the problem factor? It’s normal for me to go 2 weeks without having a BM. I often take laxatives to help with this. Where is all the ‘excess fat’ going now that Im taking ALLi but not passing anything.

Doctor: