I'm scheduled for gastric bypass surgery. And I have to take a cotinine test. I'm not sure if it's for blood, urine, or saliva. Today is Thursday, my test is on Monday. I'll let you guys know how it goes. In the meantime, I bought 1000 vitamin c, drinking lots of water, cranberry juice, lemon juice, and baking soda. If anyone knows how to pass, please let me know. Thanks in advance!