Is Stopping All Medications Before Having Gastric Sleeve A Good Idea?

I am having a gastric sleeve done in Mexico. The doctor wants me to stop all my meds 2 weeks before. I ve never had to do this with other surgeries. My meds include bupropion XL, Deplin 15, Diclofenic 75, duloxetine 120, levothyroxine 25, progesterone 200 and vit. D2 50,000.