Freezing a mixed multi-use vial can create solution changes and freeze-thaw stress that are not worth accepting unless a protocol specifically requires aliquoted frozen storage
The FDA label includes a boxed warning regarding thyroid C-cell tumors observed in rodent studies, contraindicating use in patients with personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2
The bonds that give them their structure and function are fragile in ways that most pharmaceuticals arent, as a 2025 review in Protein & Peptide Letters on therapeutic peptide stability documented: heat and environmental exposure during storage and transit break down amino acid bonds, degrading the compound before it reaches the consumer
~20% weight loss at 72 weeks Approved drug entries reflect U.S
Pradelles, P., Grassi, J., Creminon, C., Boutten, B