Understand the different purposes of PDE/HBEL, Occupational Exposure Limits and Occupational Exposure Bands.
PDE/HBEL and OEL/OEB can draw on overlapping toxicological information, but they are designed for different populations and exposure patterns. Confusing them can lead to inappropriate risk decisions.
PDE/HBEL
Primarily protects patients or target animals from unintended exposure to residues in medicinal products.
OEL
Occupational Exposure Limit addresses worker exposure in the workplace, often through inhalation and potentially dermal routes.
OEB
Occupational Exposure Band groups substances into control bands when a precise OEL is unavailable or as part of a containment strategy.
Integrated risk management
A shared-facility programme may need both patient-safety and worker-safety assessments, but the values should not be treated as interchangeable.
Frequently asked questions
Can OEL be used as the cleaning-validation PDE?
Not automatically. The populations, routes and exposure assumptions differ.
Does a low OEL imply a low PDE?
Not necessarily.
What is an OEB used for?
To support occupational containment and control decisions, often as a banded approach.
Can one report address both patient and worker protection?
It can discuss both, but the limits and rationales should remain distinct.
