I had this concern as well, I take adderall 30mg because it is not bigger than a m&m my dr said this Is fine as far as my other meds capsules I open them up and mix with applesauce and the others I cut in half with a pill cutter and take. Do not crush your meds without talking to your pharmacist or doctor first they can react different and absorb within your body differently.
I just had the Gastric bypass on 4/8 as well. I am struggling with just getting fluid down at this time but in time it will be better. My doctor called in a stronger anti nausea medication so I am hoping that will work.