Low blood pressure and medication we should avoid

Hello everyone, Does any one have a list of what medication we should avoid after having WLS ? I am almost 8 month out from my surgery date and recently my blood pressure started to go down. My blood pressure used to be 120/80 now it is 110/80; I also started to experience slight headaches. I wonder if the surgery has anything to do with my blood pressure. A had my 6 month blood work and it was good well maybe it is time to see the doctor again. Have a good day everybody. Thank you everyone Julia