2026-06-0820240185-332510.17711/SM.0185-3325.2024.030https://repositorio.inprf.gob.mx/handle/123456789/72https://doi.org/10.17711/SM.0185-3325.2024.030PDFengAcceso AbiertoFentanyl and xylazine on the Northern Border of Mexico: A New Challenge for Drug Health PolicyEditorial0186-761XInstituto Nacional de Psiquiatría Ramón de la Fuente MuñizMéxico