Preparation & administration
Multi-dose vial
Also known as: mdv
A vial designed to be entered more than once, relying on a preservative to prevent microbial growth between uses.
In plain terms
FDA has linked multi-dose vials of compounded GLP-1 drugs to repeated dosing errors, because the user must measure each dose themselves rather than receiving a pre-set pen. The vial is not the hazard; the arithmetic is.
Guides that use this term
The shortages ended, and with them the enforcement discretion that allowed mass compounding of semaglutide and tirzepatide. What FDA actually said, with the dates, and what remains permitted.
Microdosing semaglutide or tirzepatide is widely discussed and has never been tested in a randomised trial. Here is what exists, what does not, and why the distinction matters.
Sources
Educational reference only. Pepperz does not provide medical advice, diagnosis, treatment, prescribing guidance, or dosing recommendations.