Swt, it's important to remember that, even though individual experiences vary, your experience must ONLY be measured by your physical responses. Researching and investigating cannot be the final answer, and your only medical inquiry should be made by a doctor who's laid hands on you. In our group, we can share similarities, but we can't give medical advice or guidance. Your Rx meds are essential to your life, so we're here to relate to your dilemma, but your next step is to consult your doc, not some study or unknown physician. WLS is based on malabsorption and it's critical not to underestimate how that could effect the dosage you take. Your question is important for all of us to hear, but please take it to the doctor who prescribes it for you AND your bariatric team.
I'm reminded just by looking here for support and reading (and having been recruited into a University of Washington medical study myself), that if I was so smart and educated, I never would have been 100+ pounds overweight to begin with.
You're right to be exactly as concerned as you are. Next stop, your doctor's office.