my moms friend just had that gastric bypass surgery im assuming this is what yoiu are talking about if im wrong i apoligixe hers was very sucessful and she has lost a good biy of weight and is now smoking again she refrained from using for the first several months after the surgery due to the munchie factor if you were refering to wheather it is ok to smoke before the surgery i would say no problem my last trip to the dentist required anistesia and i burned one on the way to the appointment [ dont know if i spelled that right] and there were no problems at all except i came out of it very hungry and had a mouth full of stitches