The two short-acting GLP-1 RAs, exenatide BID and lixisenatide, both caused a maximum HR increase of 810 bpm 24 h after injection, which returned to baseline levels after approximately 1012 h (Sanofi, data on file [available on request [22] ] and [19, 20]), with a mean 24-h HR increase of approximately 12 bpm for both preparations
It works by mimicking the action of naturally occurring GLP-1, a hormone that stimulates insulin secretion in response to food intake, suppresses glucagon release, and affects gut motility
The lawful basis here is patient-specific 503A personalization for a documented clinical need, confirmed by the February 21, 2025 shortage end and the April 1, 2026 clarification that B12 add-ons alone do not automatically qualify a script
All the facilities and clinics with patients actively using Tirzepatide can find a non-identical dosage form that will keep prices low and margins high, or they can move their patients to a different drug that is still in short supply