"Weight and See": Initial Weight Gain After Starting Antiretroviral Therapy Is Not Associated With Antiretroviral Regimen Type and Does Not Predict Subsequent Weight Trajectory.

In a Canadian cohort with HIV, 61% gained weight, 26% lost weight, and 12% remained stable in the first year of antiretroviral therapy. Weight gain was not associated with regimen type and slowed in years 2 to 3, with 44%, 34%, and 23% experiencing increasing, decreasing, and stable trajectories. Although 23% had significant weight gain year 1, many subsequently lost weight despite continuing antiretroviral therapy.