Endocrinology: What You May Have Missed in 2025.
Escudero C, Havranek K, Martinez Cruz M, Batch B
A review of 9 key endocrinology studies from 2025 examined treatment intensification strategies, emerging side effects of GLP-1 receptor agonists, and comparative safety data across diabetes and obesity therapies. Narrative review synthesizing published research from multiple clinical trials and observational studies. The compilation provides the first comprehensive assessment of GLP-1RA side effect concerns including nonarteritic anterior ischemic optic neuropathy alongside head-to-head comparisons of dulaglutide dose escalation versus tirzepatide switching. Limited by being a narrative review rather than systematic analysis of primary endpoints.
Strategic Signal
The emphasis on GLP-1RA side effects, particularly the rare but serious optic neuropathy signal, will likely prompt FDA and EMA to request additional safety monitoring in ongoing trials. This safety focus could influence prescriber confidence and payer coverage decisions, especially for higher-dose formulations. The dulaglutide versus tirzepatide comparison data will inform Lilly's competitive positioning against Novo's established GLP-1 franchise in diabetes intensification protocols.