Inside The Exchange
Last reviewed October 15, 2026
What this team does
Medical experts who talk science with doctors and researchers in a territory.
Answer hard medical questions and bring back what doctors are seeing.
Help find investigators and support studies, without selling anything.
A day here
- 7:30Drive to a hospital two hours away. Read the new paper on the way, at a petrol station.
- 10:00Meet an oncologist. She asks about a use of the drug that is not approved.
- 10:20You answer only with published data and log it as an unsolicited question.
- 13:00Call with a site that is slow to enrol. You talk through which patients fit.
- 16:30Write up insights. Three doctors raised the same worry about dosing this month.
Roles, junior to senior
- Medical information specialistAnswering written medical questions from doctors and patients.CommunicationParticipant Safety and Safety Reporting
- Medical science liaisonScience conversations with experts in a territory, and support for studies there.CommunicationProtocol Interpretation
- Senior MSLKey experts, advisory boards and training new MSLs.CommunicationProtocol InterpretationParticipant Rights
- Medical advisorThe medical plan for a product in a country.CommunicationParticipant Safety and Safety ReportingRegulatory and Essential Records
- Head of medical affairsThe medical team, its plan and how it works with clinical and safety.CommunicationQuality
Who they talk to every day
Words you will hear
- KOL
- Key opinion leader. A doctor other doctors listen to.
- Off label
- Using a drug in a way that is not approved. MSLs only answer, never suggest.
- Unsolicited
- A question the doctor asked on their own, without being prompted.
- Insight
- Something useful a doctor said, written down for the team.
- IIS
- Investigator initiated study. A study a doctor designs, that a company may support.
- Advisory board
- A paid meeting where experts give the company advice.
Common moves in and out
People arrive with a PhD, PharmD or MD, often from research, pharmacy or clinic.
From here they move to medical advisor roles, medical leadership or clinical development.