What is Medical Affairs? A clear definition
Medical Affairs is the function within a pharmaceutical or biotech company responsible for the scientific exchange of information between the company and the healthcare community — physicians, researchers, payers and other stakeholders — grounded strictly in evidence, independent of commercial promotion.
What Medical Affairs does
- Scientific engagement — peer-to-peer scientific exchange with healthcare professionals
- Medical insights — capturing and structuring field intelligence to inform strategy
- Evidence generation — supporting real-world evidence and post-approval research
- Publications & medical communications — ensuring accurate, balanced scientific content
- Medical information — responding to unsolicited scientific enquiries
Where Medical Affairs sits
It's often described as the "third pillar" alongside R&D and Commercial — close enough to clinical development to understand the science deeply, and close enough to the field to understand how that science lands with real clinicians. That position is exactly what makes the function valuable, and exactly what compliance boundaries exist to protect.
The Medical Science Liaison (MSL)
The MSL is the field-facing role within Medical Affairs — see what an MSL actually does for the full picture.
Where it's heading
Medical Affairs is increasingly digital, increasingly data-informed, and increasingly shaped by AI-assisted workflows — while the core discipline, evidence before opinion, hasn't changed. See The Future of Medical Affairs.