In this issue of JAMA Health Forum, Aliu and colleagues 1 present data from Novartis on the global distribution of requests for compassionate use of the company's medications, defined as use of unlicensed products outside of clinical trials. The authors identify 3 country-level factors associated with the number of requests for compassionate use. The most important is the national level of economic development, with the vast majority of requests coming from high-income countries, and just 3% from low-and low-middle-income countries, where more than half of the world's population lives. Also associated with more compassionate use requests are the presence of regulations governing compassionate use and the number of in-country clinical trials registered on ClinicalTrials.gov.Exploring these 3 factors opens a window to the vast inequities in health that exist between countries. Compassionate use cannot be understood without appreciating the foundation-or lack thereof-on which access to unapproved medication rests. People and organizations devoted to closing these gaps must first recognize and address fundamental inequities in global health systems.The authors 1 offer several possible explanations for why lower-income countries have so few compassionate use requests despite the fact, as they note, that these countries "display the highest burden of diseases." The countries may "lack the necessary medical organizational infrastructure and facilities" for investigational use of medications and may struggle to afford the related costs of treatment, even though the company provides the investigational medications for free. The authors also state that the ability to request compassionate use "may be influenced by the overall country's health care system's capabilities." Indeed, the differences in access to unapproved medications reflect a much bigger picture.More than 2 billion people-the vast majority of whom live in low-and middle-income countries-lack access to essential medications, 2 which include antibiotics, insulin, pain medications, antidepressants, anti-inflammatories, and other critical therapies. Residents of these countries also face a critical shortage of health care professionals to care for patients with advanced disease. For example, compared with a US ratio of new cancer cases to oncologists of 137:1, in 27 countries, the ratio exceeds 1000:1. In 13 countries on the continent of Africa, the ratio either exceeds 5000:1, or there are no oncologists at all. 3 There are also major disparities between countries in access to diagnostic testing, hospital care, and insurance coverage. These deep inequities in access to health