Depression is world’s leading cause of disability, yet only 1 in 23 people in low-and-middle income countries (LMICs) receive minimally adequate depression treatment. A common antidepressant is amitriptyline, which is classified as an essential medication by the World Health Organization. However, there is only limited evidence of the availability of essential psychiatric medicines in LMIC health facilities. The Demographic and Health Surveys Program conducts the Service Provision Assessment (SPA) to understand availability of services and essential medicines in LMIC health facilities. We analyzed available SPA data for Afghanistan, Bangladesh, Democratic Republic of Congo, Malawi, Nepal, Senegal and Tanzania to understand the distribution and determinants of amitriptyline availability in each country. We analyzed data from 9470 health facilities. Overall, only 12% of sampled facilities had amitriptyline on the day of assessment, suggesting that the majority do not carry amitriptyline. Multivariable regression models indicated that faith-based and private-for-profit facilities were more likely than public facilities to have amitriptyline, and that hospitals were more likely than primary care facilities to have amitriptyline. The gap between hospitals and primary facilities were wider in the same country than between them. Our results indicate a severe shortage of amitriptyline in health facilities in these eight LMICs. Efforts to narrow the mental health treatment gap by integrating mental health services into primary care will be limited without the availability of essential medicines like amitriptyline. Expanded purchasing and distribution of amitriptyline, especially to LMIC primary care facilities, is warranted.