GLP-1 Supply, Shortages, and Long-Term Use: Endocrinology's 2026 Realities

GLP-1 receptor agonists have been the biggest pharmacological success story of the last decade — and the biggest supply problem. In 2026, endocrinologists spend as much time counselling patients on continuity, switching, and long-term expectations as they do on initiation.

The 2026 supply and access reality

• Branded supply has stabilised but remains fragile — periodic regional shortages still occur, especially for high-demand doses.
• Compounded GLP-1 use surged during shortages, with mixed safety reports — most regulators now restrict compounding when branded supply is adequate.
• Cost remains a major access barrier in markets where insurance coverage is limited or absent.

Long-term use considerations

• Weight regain after stopping is the rule, not the exception — counsel patients to plan for chronic therapy or have a clear maintenance strategy.
• Dose escalation plateaus — some patients hit a weight-loss plateau at maintenance doses; switching to tirzepatide is one option.
• Sarcopenia and bone density — emphasise resistance training and adequate protein, especially in older adults.

Switching and combinations

• Switching from semaglutide to tirzepatide typically gives further weight loss in plateaued patients, but is dose-titration intensive.
• Adding metformin or SGLT2 to GLP-1 in T2D is now common and evidence-based for cardio-renal protection.
• Avoid stacking GLP-1s with sulfonylureas without dose reduction — hypoglycaemia risk increases.

What this means for patients and practising clinicians

GLP-1 therapy works — and it's a long-term commitment. If you're starting a GLP-1, plan with your endocrinologist for continuity, supply contingencies, and a maintenance strategy from day one. Stop-start cycling is the fastest way to undo all the benefit.

*This article was drafted by the DocSite AI Team and reviewed for clinical accuracy. It is general medical information, not personal medical advice. For decisions about your own care, please consult a qualified specialist on DocSite.*