The goal of this clinical trial is to learn how to optimize vancomycin dosing in obese adults based on weight and kidney function. It will also assess the safety of different vancomycin dosing strategies. The main questions it aims to answer are:
Does dosing vancomycin based on kidney function provide better drug exposure than dosing based on weight? What medical or safety issues arise when vancomycin is dosed according to weight versus kidney function? Participants will be randomized into two groups. One group will receive vancomycin doses based on their weight, while the other will receive doses based on their kidney function.
Participants will:
Receive a single dose of vancomycin based on either their weight or kidney function after pretreatment with antihistamines Provide blood and urine samples at specific times for pharmacokinetic analysis Undergo body composition measurements using DEXA scans and other methods Visit the clinic for physical exams, medical history, and laboratory tests