The WHO Programme for International Drug Monitoring

A global collaboration to advance the practice of pharmacovigilance in countries across the world.

Safety in numbers

The WHO PIDM was created in 1968 to ensure that evidence about harm to patients was collected from as many sources as possible. This enables individual countries to be alerted to patterns of harm emerging across the world, but which might not be evident from their local data alone.

Members of the programme work nationally and collaborate internationally to monitor and identify the harm caused by medicines, to reduce the risks to patients, and to establish worldwide pharmacovigilance standards and systems. UMC has been responsible for the technical and operational aspects of the WHO PIDM since 1978.

A global collaboration 


The WHO PIDM is an international collaboration with the goal of ensuring timely identification of suspected safety problems in medicinal products. With more than 170 full members and associate members in 2021, the programme covers about 99% of the world’s population.

This is the WHO PIDM

A delegate at the annual meeting for the WHO Programme for International Drug Monitoring in Geneva, 2018

Programme membership

Being a part of the WHO PIDM means bringing the support and shared expertise of a global medicines safety community to your national pharmacovigilance work, and by sharing your national insights with the programme you contribute to greater patient safety worldwide.  

Requirements and advantages of membership

How to join the programme

Resources and support

Members of the programme

The combined resources of member countries and UMC give members of the WHO Programme for International Drug Monitoring access to expertise, information, and tools to support the operation of their pharmacovigilance systems and the vision of the safer use of medicines.

View the list of members

Pharmacovigilance: the basics

Medicines cure, but they can also harm -– so how can we reduce the risk of harm from medicines? And how can medicines be made safer? Here's a short introduction.

Read our beginner's guide

Global pharmacovigilance

Watch four stories about the challenges that pharmacovigilance professionals are faced with in different parts of the world, told by representatives from Morocco, Cabo Verde, Peru, and Croatia.

Watch the WHO PIDM stories

Other resources for global pharmacovigilance work