The aim of study is to:

1. To contextualize, adapt, customize and digitalize WHO's Mental Health Gap Action Programme Intervention Guide (e-mhGAP-IG); Substance Use Disorders Module (SUD module) V 2.0 for primary care settings (PCPs) in Pakistan.
2. To test the feasibility and acceotability of the e-mhGAP-IG (SUD module) training program in a feasibility cluster randomized controlled (cRCT) trial to enable mental health services in primary health care settings in Pakistan.

The proposed study includes contextualization, adaptation, customization, and a feasibility cRCT of e-mhGAP-IG (SUD module) V 2.0 by constituting a combination of traditional and technological approaches of eHealth (mHealth, blended learning, and telemedicine) enabling mental health services in primary care settings to be well informed and accessible. This intervention will empower 300 Primary Care Physicians (PCPs) based in Primary Care Units (PCUs) from urban settlements and Basic Health Units (BHUs) from rural settlements in three major cities, Karachi, Lahore, and Rawalpindi, Pakistan.

Inclusion Criteria:

• Primary and non-specialized healthcare providers working in the identified health facilities for this study across three targeted cities; willing to give informed consent for participation in this trial.

Exclusion Criteria:

• Any primary and non-specialized healthcare provider who is not permanently working in the selected health facilities, has no access to a smart mobile phone and/or internet connection; and is uncomfortable using a mobile phone.