Maybe you could find a way to sneak a little exercise into your life. If you can’t jog, walk. If you can’t walk, swim. Maybe you could take leisurely bike rides through the countryside. Maybe you could walk in a shopping mall. You don’t have to go at it like you’re training for a marathon. Just try to do something. It might make a difference. It could be that this weight gain effect of your medicine is temporary and will go away before long.