NPR reports on how ketamine is being used off-label to treat depression. While highlighting some of the reported benefits, the report also details some limitations. “One is that its ability to keep depression at bay can fade pretty quickly,” another limitation is the price, which can run “about $500 for each injection and $1,000 for an intravenous infusion.” There is also concern that ketamine clinics are opening up all over the country “as pure business models.”