Background: Tuberculosis is defined by WHO as a global health problem and is one of ten causes of mortality around the world. There has been an increase of pulmonary TB cases in South Sumatera in 2021. The city that makes the most number of pulmonary TB cases in South Sumatera is Palembang. One of complications that is caused by pulmonary TB is hyponatremia. The aim of this study is to determin…