In Sierra Leone, a cheap, synthetic drug is ravaging youth. Trash-strewn alleys are lined with boys and young men slumped in addiction. Healthcare services are severely limited. One frustrated community has set up what it calls a treatment center, run by volunteers. But harsh measures can be used.

The project in the Bombay suburb of the capital, Freetown, started in the past year when a group of people tried to help a colleague’s younger brother off the drug called kush. After persuasion and threats failed, they locked him in his room for two months. It worked. He has returned to university and thanked them for setting him free.

“The only time I left the room was when I went to the bathroom,” Christian Johnson, 21, recalled. He said he was motivated to kick the drug by thoughts of his family, the fear of becoming a dropout and the abandonment by many of his friends.

The volunteers then expanded the effort and took over an abandoned building. They seize people at families’ request and sometimes chain them to prevent them from escaping — an echo of a practice the West African country’s only psychiatric hospital previously used. There’s little padding against the concrete floor and walls, and little to do beyond confronting their craving.