I have just been prescribed Sotalol (2x 40mg per day- a low dose) for newly diagnosed paroxysmal atrial fibrillation. Does anyone know if this medicine is likely to cause weight gain? Also, I sometimes feel that my concentration and memory are slightly impaired (Eg I inadvertently put some groceries into a shopping bag instead of the bagging area- not something I would normally do). This could, of course, be the result of anxiety following the afib rather than the afib itself, but I wondered what the experiences of others on this medication are? I have been taking Sotalol for nearly two weeks.