And since April, Chris, a wiry, soft-spoken 30-year-old who wanted to be identified by only his first name to protect his privacy, has received pharmaceutical-grade fentanyl through the dispensary, which sells to those who can pay and provides free drugs through the program’s operational budget to those who cannot.

The new program aims to provide a safer alternative to the fentanyl available on the streets, where the supply is increasingly lethal and is responsible for most of the overdose epidemic that was declared a public health emergency here six years ago.

Dr. Christy Sutherland, a board-certified addiction medicine specialist who set up the program, said its goal was, first, to keep people from dying, and, second, to help bring stability to their lives so that they may think about what they might want to change.