This document summarizes a study on why patients in KwaZulu-Natal, South Africa stop taking their antiretroviral (ART) medications. The study interviewed 180 current ART patients, 60 former patients who stopped treatment, and 30 healthcare providers across 5 public health sites. It found that former patients generally came from more vulnerable social and financial situations than current patients. Many stopped due to medication side effects or lack of money for food or transportation. Overall, the circumstances around patients stopping ART involved vulnerable social situations with little support, marginal economic conditions with few reliable income sources, and struggles with side effects.