The mental health Gap Action Programme (mhGAP) is a WHO programme that seeks to address the lack of care for people suffering from mental, neurological and substance use (MNS) conditions. The mhGAP-IG is a clinical guide for general health-care providers who work in non-specialized health-care settings, particularly in low- and middle-income countries. The mhGAP-HIG was developed in order to address specific challenges in humanitarian emergency settings.