Overview of Diabetes Medications: Traditional and New-Generation Agents and Their Off-Label Use for Weight Loss.

Diabetes mellitus encompasses chronic metabolic disorders marked by impaired insulin secretion, action, or both, with type 1 and type 2 diabetes presenting distinct mechanisms and therapeutic needs. Achieving durable glycemic control remains essential to preventing microvascular and macrovascular complications.The growing prevalence of obesity among people with diabetes-driven by insulin resistance, lifestyle factors, and, in type 1 diabetes, insulin-associated weight gain-has increased the demand for therapies targeting both glycemia and body weight.Traditional agents such as insulin, metformin, sulfonylureas, and thiazolidinediones have long served as treatment foundations but are limited by risks like hypoglycemia and weight gain. Incretin-based therapies, particularly glucagon-like peptide-1 (GLP-1) receptor agonists and sodium-glucose cotransporter 2 (SGLT-2) inhibitors, have reshaped diabetes care by improving glycemic control, promoting weight loss, and offering cardiovascular and renal protection.Newer dual and multiagonists, including tirzepatide and emerging triple agonists, show unprecedented reductions in HbAand body weight, approaching outcomes seen with bariatric surgery. However, rising off-label use of antidiabetic drugs for weight loss raises safety concerns, including gastrointestinal effects and rare motility disorders, underscoring the need for careful patient selection and pharmacovigilance.Ongoing challenges include high costs, inequities in access, medication shortages, and the need for sustained pharmacovigilance. Future directions involve oral non-peptide incretin mimetics, broader indications for multiagonists, and deeper understanding of long-term safety, particularly in off-label contexts.