Background: Limited recent data exist on prescribing patterns and patient characteristics for glucagon-like peptide 1 receptor agonists (GLP-1 RAs), an important drug class used as anti-diabetic medication (ADM) for patients with type 2 diabetes mellitus (T2D) and/or anti-obesity medication (AOM) in patients with overweight or obesity. For brevity, we use the term GLP-1 RA to refer to both GLP-1 RA and dual GLP-1 RA/GIP medications. Objective: To describe recent trends in prescribing and dispensing of GLP-1-based medications in the US. Methods: Using a subset of real-world electronic health record (EHR) data from Truveta, a growing collective of health systems that provide more than 18% of all daily clinical care in the US, we identified people who were prescribed a GLP-1-based medication between January 01, 2019 and September 30, 2026. We describe prescribing volumes and patient characteristics over time, by medication, and by FDA-labeled use. Among the subset of patients for whom post-prescription dispensing data is available, we describe the proportion and characteristics of patients who were and were not dispensed a GLP-1 RA following their prescription. Results: 4,458,532 patients were prescribed a GLP-1 RA between January 2019 and September 2026, with 23,616,330 total prescriptions during this period. Overall prescribing rates (GLP-1 RA prescriptions as a proportion of all prescriptions) increased by 7.0% from June to September 2026. AOM prescribing increased by 12.2% (+0.38 percentage points), with the largest month-over-month increase occurring from June to July and prescribing remained relatively steady thereafter. On July 1, 2026, the Medicare GLP-1 Bridge Program was implemented to expand access to GLP-1 AOMs for Medicare beneficiaries by reducing out-of-pocket costs. The June-to-July increase coincided with the July 1 implementation of the Medicare GLP-1 Bridge and may reflect expanded access to GLP-1 RAs for weight management through the program. This increase was largely driven by AOM tirzepatide, for which prescribing increased by 16.9%. Although AOM orforglipron prescribing more than doubled (+112.2%), orforglipron still accounted for a small proportion of AOM prescriptions. Tirzepatide remained the most commonly prescribed GLP-1 RA, while semaglutide prescribing remained relatively stable. Among first-time prescriptions for which indication could be established, ADMs accounted for 62.6% and AOMs accounted for 37.4%. Overall, first-time prescribing increased from June to July before declining through August and September, with rates in September similar to June (-1.8%). First-time AOM prescribing also increased from June to July before declining, with rates in September remaining relatively stable compared with June (+3.7%). First-time AOM tirzepatide prescribing increased by 10.1% from June to September, while first-time AOM semaglutide prescribing decreased by 12.5%. Trends in Prescribing: Overall prescribing rates (GLP-1 RA prescriptions per total prescriptions) in September 2026 increased slightly relative to June 2026 (+6.99%). ADM prescribing showed slight month-to-month increases, however ADM prescribing in September 2026 are about the same June 2026 (+2.73%). Month-over-month AOM prescribing increased most from June to July 2026 and remained relatively steady through September 2026. Overall, there was a 0.38 percentage point increase compared with June 2026 (+12.2%). The largest increase came from AOM tirzepatide prescriptions (+16.9%), which accounted for most of the overall increase. AOM orforglipron prescribing more than doubled (+112.2%), although overall prescribing remained low at 0.12% in September 2026. The June-to-July increase in AOM prescribing coincided with the July 1 implementation of the Medicare GLP-1 Bridge and may reflect expanded access to GLP-1 RAs for weight management through the program. Tirzepatide remains the most commonly prescribed GLP-1 RA and continued to increase over the last quarter, particularly when prescribed for obesity, while semaglutide prescribing remained relatively stable. Trends in First-Time Prescribing: Overall first-time GLP-1 RA prescribing increased from June to July 2026, then declined in August and September. By September, first-time prescribing rates were similar to June (-1.81%). First-time prescribing of ADMs decreased in September 2026, relative to June 2026 (-10.85%). First-time AOM prescribing increased from June to July 2026, then declined and remained relatively steady through September. Overall, first-time AOM prescribing in September was similar to June (+3.66%). First-time AOM tirzepatide prescribing increased 10.1%, while AOM orforglipron prescribing nearly doubled (+83.0%), although overall first-time prescribing of AOM orforglipron remained low. Similar to overall prescribing, the June-to-July increase in first-time AOM prescribing coincided with the July 1 implementation of the Medicare GLP-1 Bridge and may reflect expanded access to GLP-1 RAs for weight management through the program. Trends in Dispensing: During the full time period, 69.9% of GLP-1 RA prescriptions had a dispense within 60 days of their prescription (e.g., were initiated within 60 days). For patients first prescribed an ADM in June 2026, 71.5% filled a GLP-1 RA within 60 days. Initiation rates for ADM GLP-1 RA are about the same in June 2026, relative to March 2026 (+0.16%). For patients first prescribed an AOM in June 2026, 44.9% filled a GLP-1 RA within 60 days. Initiation rates for AOM GLP-1 RA are about the same in June 2026, relative to March 2026 (+2.48%). About this report: This report provides recent trends in the prescribing and dispensing of glucagon-like peptide-1 receptor agonist (GLP-1 RAs)-based medications, including dual GLP-1 RA/gastric inhibitory polypeptide (GIP) over time, by medication, and by FDA-labeled use. We used near real-time, aggregated electronic health record (EHR) data from a collective of US...