Rett Syndrome Market Sees Momentum with Novel Gene and Protein-Targeted Therapies
Rett syndrome market dynamics are expected to undergo significant shifts as more targeted therapies, including gene therapies and pharmacological interventions, enter clinical development and regulatory approval stages. Additionally, increased awareness, improved diagnostic methods, and collaborative efforts within the healthcare community may drive Rett syndrome market expansion and accessibility to treatments for affected individuals.
LAS VEGAS, May 26, 2025 /PRNewswire/ — Rett syndrome is a rare genetic neurological condition that typically emerges in infancy and primarily affects girls, though occasional cases have been observed in boys. The disorder causes profound impairments that impact nearly all aspects of a person's life.
It is the second leading cause of severe intellectual disability in females. During the stage of developmental regression, many individuals with Rett syndrome also meet the diagnostic criteria for autism spectrum disorder (ASD). The condition mostly affects females because it is linked to mutations on the X chromosome. Females have two X chromosomes, which can provide some genetic compensation, whereas males, who have only one X chromosome, are less likely to survive if the MECP2 gene is mutated.
There is no known cure for Rett syndrome, and treatment focuses on symptom management through a comprehensive, multidisciplinary approach. Care often involves coordination among various specialists, including pediatricians, pediatric neurologists, gastroenterologists, speech therapists, psychiatrists, nutritionists, and others, to address the child's complex needs. Genetic counseling can also be helpful for patients and their families. Rett syndrome treatment typically includes physical therapy, occupational therapy, speech and language therapy, nutritional support, and medications.
Learn more about the Rett syndrome treatment @ New Treatment for Rett Syndrome
In March 2023, the US FDA approved Acadia Pharmaceuticals' DAYBUE (trofinetide) as the first treatment for Rett syndrome in both adults and children aged two years and older. Trofinetide is a synthetic analog of a naturally occurring tripeptide called glycine-proline-glutamate (GPE).
While the precise therapeutic mechanism of trofinetide in Rett syndrome remains unclear, animal studies have shown that it can promote dendritic branching and enhance synaptic plasticity. The medication is administered either orally or through a gastrostomy tube, taken twice daily—morning and evening—with or without food.
Other Rett syndrome treatments, such as bromocriptine and carbidopa-levodopa (dopamine agonists), have been explored to manage motor symptoms in Rett syndrome, though their effectiveness tends to be limited and short-lived. Some evidence suggests levocarnitine may offer benefits in certain cases. For patients with gastroesophageal reflux (GER), antireflux medications like metoclopramide may be helpful, and anti-epileptic drugs are often used to manage seizure-like episodes. While none of these treatments offer a cure, they can help alleviate symptoms such as seizures, breathing irregularities, abnormal heart rhythms, indigestion, and constipation.
Find out more on FDA-approved Rett syndrome drugs @ Rett Syndrome Treatment Options
The pipeline for Rett syndrome is continuously evolving with ongoing research and clinical trials focusing on innovative approaches to improve outcomes and reduce side effects. Current areas of interest in the pipeline include targeted therapies, gene therapies, and others.
Thus, the pipeline for Rett syndrome looks promising, with a range of novel therapies such as NA-921 (Bionetide) (Biomed Industries), NGN-401 (NEUROGENE), TSHA-102 (Taysha Gene Therapies), ANAVEX2-73(BLARCAMESINE) (Anavex Lifesciences), and others, and approaches under investigation that have the potential to redefine Rett syndrome treatment standards and improve patient outcomes in the future.
Discover which therapies are expected to grab major Rett syndrome market share @ Rett Syndrome Market Report
ANAVEX2-73 (blarcamesine), developed by Anavex Life Sciences, is an experimental oral treatment aimed at restoring normal brain signaling in individuals with Rett syndrome by activating the sigma-1 receptor (SIGMAR1), a key brain protein. The drug is currently being assessed in two clinical trials:
The AVATAR study, a Phase III double-blind, randomized, placebo-controlled trial in adults (18+) with Rett syndrome. This study evaluates the drug's safety, tolerability, and efficacy using a range of clinical, molecular, and biochemical endpoints.
The EXCELLENCE study, which is investigating its effects in pediatric patients aged 5–17 years.
Results from an earlier Phase II trial in adult patients indicated behavioral improvements that persisted for several months during an extension phase. ANAVEX2-73 has received Fast Track, Rare Pediatric Disease, and Orphan Drug designations from both the FDA and the European Union.
NGN-401, being developed by Neurogene, is an investigational one-time gene therapy for Rett syndrome based on an AAV9 vector. It is the first clinical candidate to deliver the full-length human MECP2 gene using Neurogene's proprietary EXACT™ technology, which precisely controls gene expression levels. This regulation is critical for treating Rett syndrome, as excessive MECP2 expression can lead to toxicity, a challenge for traditional gene therapies.
Neurogene is currently conducting a Phase I/II clinical trial for NGN-401. In April 2025, the company published peer-reviewed research in Science Translational Medicine showcasing the ability of EXACT to maintain MECP2 expression at safe and therapeutic levels in preclinical Rett models. These findings supported the launch of their ongoing clinical trial.
NGN-401 has received Fast Track, Rare Pediatric Disease, and Orphan Drug status from the FDA, along with Orphan and Advanced Therapy Medicinal Product designations from the EMA and Innovative Licensing and Access Pathway (ILAP) designation from the UK's MHRA.
TSHA-102 is an experimental gene therapy delivered intrathecally using a self-complementary AAV9 vector, currently being studied for the treatment of Rett syndrome. Intended as a one-time therapy, it targets the underlying genetic cause of the disorder by introducing a functional MECP2 gene into cells of the central nervous system (CNS). The therapy features an innovative miRNA-Responsive Auto-Regulatory Element (miRARE) technology, which helps regulate MECP2 expression in individual CNS cells, minimizing the risk of overexpression.
TSHA-102 has been granted multiple regulatory designations, including Regenerative Medicine Advanced Therapy, Fast Track, Orphan Drug, and Rare Pediatric Disease designations from the FDA, Orphan Drug designation from the European Commission, and an Innovative Licensing and Access Pathway designation from the UK's Medicines and Healthcare products Regulatory Agency.
NA-921 (Bionetide) is an orally administered small molecule currently in Phase III clinical trials for treating Rett syndrome. Its ability to efficiently cross the blood-brain barrier allows it to be effective at low doses. In March 2025, Biomed Industries announced the results of its Phase II/III clinical trials. The topline data confirmed strong evidence of both safety and efficacy. A comparative analysis of side effects revealed that NA-921 has a significantly better safety and tolerability profile than DAYBUE, a drug marketed by Acadia Pharmaceuticals, Inc. These results position NA-921 as a promising new treatment option, with reduced side effects and higher patient adherence.
Discover more about drugs for Rett syndrome in development @ Rett Syndrome Clinical Trials
The anticipated launch of these emerging therapies for Rett syndrome are poised to transform the market landscape in the coming years. As these cutting-edge therapies continue to mature and gain regulatory approval, they are expected to reshape the Rett syndrome market landscape, offering new standards of care and unlocking opportunities for medical innovation and economic growth.
DelveInsight estimates that the market size for Rett syndrome is expected to grow at a significant CAGR by 2034. The Rett syndrome market is estimated to change significantly for the forecast period 2025–2034. Major Rett syndrome market drivers, such as rising prevalence, technological advancements, and upcoming therapies, will boost the Rett syndrome market significantly.
DelveInsight's latest published market report, titled as Rett Syndrome Market Insight, Epidemiology, and Market Forecast – 2034, will help you to discover which market leader is going to capture the largest market share. The report provides comprehensive insights into the Rett syndrome country-specific treatment guidelines, patient pool analysis, and epidemiology forecast to help understand the key opportunities and assess the market's underlying potential. The Rett syndrome market report proffers epidemiological analysis for the study period 2020–2034 in the 7MM segmented into:
Total Rett Syndrome Diagnosed Prevalent Cases
Rett Syndrome Gender-Specific Diagnosed Prevalent Cases
Rett Syndrome Age-specific Diagnosed Prevalent Cases
Rett Syndrome Treated Cases
The report provides an edge while developing business strategies by understanding trends shaping and driving the 7MM Rett syndrome market. Highlights include:
10-year Forecast
7MM Analysis
Epidemiology-based Market Forecasting
Historical and Forecasted Market Analysis upto 2034
Emerging Drug Market Uptake
Peak Sales Analysis
Key Cross Competition Analysis
Industry Expert's Opinion
Access and Reimbursement
Download this Rett syndrome market report to assess the epidemiology forecasts, understand the patient journeys, know KOLs' opinions about the upcoming treatment paradigms, and determine the factors contributing to the shift in the Rett syndrome market. Also, stay abreast of the mitigating factors to improve your market position in the Rett syndrome therapeutic space.
Related Reports
Rett Syndrome Epidemiology Forecast
Rett Syndrome Epidemiology Forecast – 2034 report delivers an in-depth understanding of the disease, historical and forecasted Rett syndrome epidemiology in the 7MM, i.e., the United States, EU5 (Germany, Spain, Italy, France, and the United Kingdom), and Japan.
Rett Syndrome Pipeline
Rett Syndrome Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key Rett syndrome companies, including Anavex Life Sciences Corp, Neurogene, Taysha GTx, among others.
Angelman Syndrome Market
Angelman Syndrome Market Insights, Epidemiology, and Market Forecast – 2034 report delivers an in-depth understanding of the disease, historical and forecasted epidemiology, as well as the market trends, market drivers, market barriers, and key Angelman syndrome companies, including GeneTx Biotherapeutics, GEXVal, Ionis Pharmaceuticals, Neuren Pharmaceuticals, Ovid Therapeutics, PTC Therapeutics, Roche, Sarepta Therapeutics, StrideBio, Taysha Gene Therapies, Ultragenyx Pharmaceutical, among others.
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Angelman Syndrome Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key Angelman syndrome companies, including Neuren Pharmaceuticals, Ultragenyx Pharmaceutical, Ionis Pharmaceuticals, Roche, GEXVal, PTC Therapeutics, Taysha Gene Therapies, Ovid Therapeutics, among others.
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Malaysian Reserve
11 hours ago
- Malaysian Reserve
Lilly's once-weekly insulin efsitora alfa demonstrated A1C reduction and a safety profile consistent with daily insulin in multiple Phase 3 trials
Results from the fixed-dose QWINT-1 study, along with the QWINT-3 and QWINT-4 studies, reinforce efsitora's potential to simplify insulin management with weekly dosing Lilly plans to submit efsitora for the treatment of adults with type 2 diabetes to global regulatory agencies by the end of this year INDIANAPOLIS, June 22, 2025 /PRNewswire/ — Eli Lilly and Company (NYSE: LLY) today announced detailed results from QWINT-1, QWINT-3, and QWINT-4 Phase 3 clinical trials evaluating the safety and efficacy of investigational once-weekly insulin efsitora alfa (efsitora) in adults with type 2 diabetes who used insulin for the first time, previously used daily basal insulin, and previously used daily basal insulin and mealtime insulin, respectively. In each trial, once-weekly efsitora met the primary endpoint of non-inferior A1C reduction compared to daily basal insulin. The complete results from these studies were presented at the American Diabetes Association (ADA) 85th Scientific Sessions 2025. Simultaneously, results from QWINT-1, a first-of-its-kind fixed-dose study, were published in The New England Journal of Medicine, while results from QWINT-3 and QWINT-4 were published in The Lancet. In QWINT-1, efsitora reduced A1C by 1.31% compared to 1.27% for insulin glargine at week 52 for the efficacy estimand.1,2 In the trial, efsitora was titrated to four fixed doses at four-week intervals, as needed for blood glucose control.3 In QWINT-3, efsitora reduced A1C by 0.86% compared to 0.75% for insulin degludec at week 26 for the efficacy estimand.4 In QWINT-4, efsitora reduced A1C by 1.07% compared to 1.07% for insulin glargine at week 26 for the efficacy estimand.5 In these two trials, efsitora was administered using traditional insulin dosing with adjustments based on each patient's glucose level. 'The novel fixed-dose regimen used in QWINT-1 for once-weekly efsitora, which consisted of only four single-dose titration options, has the potential to facilitate and simplify insulin therapy, reducing the hesitation often associated with starting insulin to treat type 2 diabetes,' said Dr. Julio Rosenstock, senior scientific advisor for Velocity Clinical Research at Medical City Dallas, clinical professor of medicine, University of Texas Southwestern Medical Center, and lead trial investigator for QWINT-1. 'A simpler, once-weekly regimen with efsitora may help people with type 2 diabetes initiate and manage insulin therapy with the goal of improving blood sugar levels. Across all QWINT trials, the results showed that once-weekly efsitora controlled glucose as effectively as the most popular once-daily basal insulins.' QWINT-1 Primary Endpoint Efficacy Estimand Treatment-RegimenEstimand6 Primary Endpoint – A1C Reduction (Resulting A1C) at Week 52 Efsitora -1.31 % (6.92 %) -1.19 % (7.05 %) Glargine -1.27 % (6.96 %) -1.16 % (7.08 %) QWINT-3 Primary and Key Secondary Endpoints Efficacy Estimand Treatment-RegimenEstimand Primary Endpoint – A1C Reduction (Resulting A1C) at Week 26 Efsitora -0.86 % (6.93 %) -0.81 % (6.99 %) Degludec -0.75 % (7.03 %) -0.72 % (7.08 %) Key Secondary Endpoint – Rates of Clinically Significant or Severe Nocturnal Hypoglycemic Events Per Patient-Year of Exposure up to Week 787,8 Efsitora 0.11 Degludec 0.10 Key Secondary Endpoint – Percent Time in Range (70-180 mg/dL) During the FourWeeks Prior to Week 26 Efsitora 62.8 % 61.4 % Degludec 61.3 % 61.0 % QWINT-4 Primary and Key Secondary Endpoints Efficacy Estimand Treatment-Regimen Estimand Primary Endpoint – A1C Reduction (Resulting A1C) at Week 26 Efsitora -1.07 % (7.12 %) -1.01 % (7.17 %) Glargine -1.07 % (7.11 %) -1.00 % (7.18 %) Key Secondary Endpoint – Participants Achieving A1C <7% at Week 26 Without Nocturnal Hypoglycemia Efsitora 39.5 % 38.6 % Glargine 36.6 % 35.9 % Key Secondary Endpoint – Rates of Clinically Significant or Severe NocturnalHypoglycemic Events Per Patient-Year of Exposure up to Week 26 Efsitora 0.67 Glargine 1.00 'Building on Lilly's legacy of innovation in insulin therapy, once-weekly efsitora may offer a significant advancement for people with type 2 diabetes who need insulin by eliminating over 300 injections per year,' said Jeff Emmick, M.D., Ph.D., senior vice president of product development at Lilly. 'These results reinforce the potential for once-weekly efsitora to help reduce the overall burden of insulin therapy through a simplified treatment approach. We look forward to working with regulatory agencies to bring this innovation to patients around the world.' Across the three trials, efsitora demonstrated an overall safety profile similar to two of the most commonly used daily basal insulin therapies for the treatment of type 2 diabetes. In QWINT-1, efsitora resulted in approximately 40% fewer hypoglycemic events compared to insulin glargine, with estimated combined rates of severe or clinically significant hypoglycemic events per patient-year of exposure of 0.50 with efsitora vs. 0.88 with insulin glargine at 52 weeks. In QWINT-3, these rates were 0.84 with efsitora vs. 0.74 with insulin degludec at 78 weeks. In QWINT-4, estimated combined rates of severe or clinically significant hypoglycemic events per patient-year of exposure were 6.6 with efsitora vs. 5.9 with insulin glargine at 26 weeks. Lilly plans to submit efsitora for the treatment of adults with type 2 diabetes to global regulatory agencies by the end of this year. About the QWINT clinical trial programThe QWINT Phase 3 global clinical development program for insulin efsitora alfa (efsitora) in diabetes began in 2022 and has enrolled more than 3,000 people living with type 2 diabetes across four global registration studies. QWINT-1 (NCT05662332) was a parallel-design, open-label, treat-to-target, randomized controlled clinical trial comparing the efficacy and safety of efsitora as a once-weekly basal insulin using a fixed dose escalation to daily insulin glargine for 52 weeks in insulin-naïve adults with type 2 diabetes. The trial randomized 795 participants across the U.S., Argentina and Mexico to receive efsitora once weekly or insulin glargine once daily, administered subcutaneously. Participants treated with efsitora received a starting dose of 100 units of insulin, followed by escalation to fixed dosages of 150 units, 250 units and 400 units every four weeks, as needed, until achieving a target fasting blood glucose of 80-130 mg/dL. Participants with fasting blood glucose greater than 130 mg/dL on or after 16 weeks were transferred to flexible dosing. The primary objective of the trial was to demonstrate non-inferiority in reducing A1C at week 52 with efsitora compared to daily use of insulin glargine. QWINT-3 (NCT05275400) was a multicenter, randomized, parallel-design, open-label trial comparing the efficacy and safety of efsitora as a once-weekly basal insulin to insulin degludec for 78 weeks after a three-week lead-in followed by a five-week safety follow up period, in adults with type 2 diabetes who are currently treated with basal insulin. The trial randomized 986 participants across the U.S., Argentina, Hungary, Japan, Korea, Poland, Puerto Rico, Slovakia, Spain and Taiwan to receive efsitora once weekly or insulin degludec once daily, administered subcutaneously. The primary objective of the study was to demonstrate non-inferiority in reducing A1C at week 26 with efsitora compared to insulin degludec. QWINT-4 (NCT05462756) was a parallel-design, open-label, treat-to-target, randomized controlled clinical trial comparing the efficacy and safety of efsitora as a weekly basal insulin to insulin glargine for 26 weeks in adults with type 2 diabetes who have previously been treated with basal insulin and at least two injections per day of mealtime insulin. The trial randomized 730 participants across the U.S., Argentina, Germany, India, Italy, Mexico, Puerto Rico and Spain to receive efsitora once weekly or insulin glargine once daily, both of which were administered subcutaneously along with insulin lispro. The primary objective of the trial was to demonstrate non-inferiority in reducing A1C at week 26 with efsitora compared to insulin glargine. About insulin efsitora alfaInsulin efsitora alfa (efsitora) is a once-weekly basal insulin, a fusion protein that combines a novel single-chain variant of insulin with a human IgG2 Fc domain. It is specifically designed for once-weekly subcutaneous administration, and with its low peak-to-trough ratio, it has the potential to provide more stable glucose levels (less glucose variability) throughout the week. About Lilly Lilly is a medicine company turning science into healing to make life better for people around the world. We've been pioneering life-changing discoveries for nearly 150 years, and today our medicines help tens of millions of people across the globe. Harnessing the power of biotechnology, chemistry and genetic medicine, our scientists are urgently advancing new discoveries to solve some of the world's most significant health challenges: redefining diabetes care; treating obesity and curtailing its most devastating long-term effects; advancing the fight against Alzheimer's disease; providing solutions to some of the most debilitating immune system disorders; and transforming the most difficult-to-treat cancers into manageable diseases. With each step toward a healthier world, we're motivated by one thing: making life better for millions more people. That includes delivering innovative clinical trials that reflect the diversity of our world and working to ensure our medicines are accessible and affordable. To learn more, visit and or follow us on Facebook, Instagram, and LinkedIn. P-LLY The efficacy estimand represents the treatment effect on all participants who adhered to the study drug without initiating rescue therapy for persistent severe hyperglycemia. From a baseline of 8.20% for efsitora and 8.28% for insulin glargine. Participants treated with efsitora received a starting dose of 100 units of insulin, followed by escalation to fixed dosages of 150 units, 250 units and 400 units every four weeks, as needed, until achieving a target fasting blood glucose of 80-130 mg/dL. Participants with fasting blood glucose greater than 130 mg/dL on or after 16 weeks were transferred to flexible dosing. From a baseline of 7.80% for both efsitora and insulin degludec. From a baseline of 8.18% for both efsitora and insulin glargine. The treatment-regimen estimand represents the estimated average treatment effect regardless of treatment discontinuation or introduction of rescue therapy for persistent severe hyperglycemia. Blood glucose <54 mg/dL. Nocturnal hypoglycemia was defined as any event that occurred at night between midnight and 6 a.m. Cautionary Statement Regarding Forward-Looking StatementsThis press release contains forward-looking statements (as that term is defined in the Private Securities Litigation Reform Act of 1995) about insulin efsitora alfa as a potential treatment for people with type 2 diabetes and the timeline for future readouts, presentations, and other milestones relating to insulin efsitora alfa and its clinical trials and reflects Lilly's current beliefs and expectations. However, as with any pharmaceutical product, there are substantial risks and uncertainties in the process of drug research, development, and commercialization. Among other things, there is no guarantee that future study results will be consistent with study results to date, that insulin efsitora alfa will prove to be a safe and effective treatment for type 2 diabetes, that insulin efsitora alfa will receive regulatory approval, or that Lilly will execute its strategy as expected. For further discussion of these and other risks and uncertainties that could cause actual results to differ from Lilly's expectations, see Lilly's Form 10-K and Form 10-Q filings with the United States Securities and Exchange Commission. Except as required by law, Lilly undertakes no duty to update forward-looking statements to reflect events after the date of this release. Trademarks and Trade NamesAll trademarks or trade names referred to in this press release are the property of the company, or, to the extent trademarks or trade names belonging to other companies are referenced in this press release, the property of their respective owners. Solely for convenience, the trademarks and trade names in this press release are referred to without the ® and ™ symbols, but such references should not be construed as any indicator that the company or, to the extent applicable, their respective owners will not assert, to the fullest extent under applicable law, the company's or their rights thereto. We do not intend the use or display of other companies' trademarks and trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies. Refer to: Niki Biro; niki_biro@ 317-358-9074 (Media) Michael Czapar; czapar_michael_c@ 317-617-0983 (Investors)
The Star
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Malaysian Reserve
a day ago
- Malaysian Reserve
Lilly's oral GLP-1, orforglipron, showed compelling efficacy and a safety profile consistent with injectable GLP-1 medicines, in complete Phase 3 results published in The New England Journal of Medici
The investigational once-daily pill lowered A1C by an average of 1.3% to 1.6% across doses, with improvements seen as early as four weeks, in adults with type 2 diabetes In ACHIEVE-1, orforglipron also led to an average weight loss of 16.0 lbs (7.9%) at the highest dose by week 40 in a key secondary endpoint The safety profile of orforglipron was consistent with the established GLP-1 class INDIANAPOLIS, June 21, 2025 /PRNewswire/ — Eli Lilly and Company (NYSE: LLY) today announced detailed results from ACHIEVE-1, a Phase 3 trial evaluating the safety and efficacy of orforglipron compared to placebo in adults with type 2 diabetes and inadequate glycemic control with diet and exercise alone. Orforglipron is the first oral small molecule (non-peptide) glucagon-like peptide-1 (GLP-1) receptor agonist, taken without food and water restrictions, to successfully complete a Phase 3 trial. At 40 weeks, all three doses (3 mg, 12 mg, 36 mg) of orforglipron achieved the primary endpoint of superior A1C reduction. In addition, the 12 mg and 36 mg doses showed clinically meaningful and statistically significant reductions in body weight vs. placebo. In the study, orforglipron had a safety profile similar to the established GLP-1 class, and the most frequently reported adverse events were gastrointestinal-related. The results were presented at the American Diabetes Association (ADA) 85th Scientific Sessions 2025 and simultaneously published in The New England Journal of Medicine. In the study, orforglipron met the primary endpoint of superior A1C reduction compared to placebo at 40 weeks, lowering A1C by 1.3% to 1.6% from a baseline of 8.0%, for the efficacy estimand.1 In key secondary endpoints, up to 76.2% of participants taking orforglipron achieved the ADA treatment target A1C of <7%, 66.0% achieved an A1C of ≤6.5%, and 25.8% achieved <5.7%, defined as a normal A1C value.2,3 Improvements in A1C were observed as early as four weeks and were accompanied by similar reductions in fasting serum glucose. In another key secondary endpoint, participants taking the highest dose of orforglipron lost an average of 16.0 lbs (7.9%). While participants in ACHIEVE-1 did not appear to reach a weight plateau, longer-duration trials, such as the ATTAIN trials, will provide a comprehensive evaluation of the safety and efficacy of orforglipron for the treatment of obesity. 'The ACHIEVE-1 trial demonstrated that orforglipron, a novel oral small-molecule GLP-1, achieved clinically meaningful reductions in A1C and body weight over 40 weeks in adults with type 2 diabetes,' said Dr. Julio Rosenstock, senior scientific advisor for Velocity Clinical Research at Medical City Dallas, clinical professor of medicine, University of Texas Southwestern Medical Center, and lead trial investigator. 'The early onset of glycemic improvement, observed as soon as four weeks, reinforces the therapeutic potential of orforglipron as an effective, oral GLP-1 therapy for early type 2 diabetes treatment. These findings support further investigation in broader populations and longer-duration studies.' Full Results Orforglipron 3 mg Orforglipron 12 mg Orforglipron 36 mg Placebo Primary Endpoint A1C reduction from baseline of 8.0 %i Efficacy estimand 1.3 % 1.6 % 1.5 % 0.1 % Treatment-regimen estimand4 1.2 % 1.5 % 1.5 % 0.4 % Key Secondary Endpointsii Percent weight reduction from baseline of 90.2 kg (198.9 lbs)i,iii Efficacy estimand 4.7 % 6.1 % 7.9 % 1.6 % Treatment-regimen estimand 4.5 % 5.8 % 7.6 % 1.7 % Weight reduction from baseline of 90.2 kg (198.9 lbs)i,iii Efficacy estimand 4.4 kg (9.7 lbs) 5.5 kg (12.2 lbs) 7.3 kg (16.0 lbs) 1.3 kg (2.9 lbs) Treatment-regimen estimand 4.2 kg (9.3 lbs) 5.2 kg (11.5 lbs) 7.2 kg (15.8 lbs) 1.5 kg (3.4 lbs) Percent of participants achieving A1C <7 %i Efficacy estimand 72.9 % 76.2 % 74.9 % 28.0 % Treatment-regimen estimand 68.1 % 72.9 % 72.7 % 33.0 % Percent of participants achieving A1C ≤6.5 %i,ii Efficacy estimand 61.5 % 62.3 % 66.0 % 13.5 % Treatment-regimen estimand 56.9 % 58.1 % 61.9 % 14.9 % Percent of participants achieving A1C <5.7 %iii Efficacy estimand 17.7 % 25.8 % 23.9 % 3.8 % Treatment-regimen estimand 16.8 % 23.9 % 21.5 % 3.8 % Fasting serum glucose reduction from baseline of 147.5 mg/dLi Efficacy estimand 30.6 mg/dL 37.4 mg/dL 37.8 mg/dL 1.1 mg/dL Treatment-regimen estimand 30.7 mg/dL 36.5 mg/dL 34.7 mg/dL 10.8 mg/dL iSuperiority test was adjusted for from the full list of key secondary endpoints are available in the of participants achieving A1C <5.7% across all orforglipron doses and body weight for orforglipron 3 mg were not controlled for Type 1 error. 'This convenient once-daily pill with no restrictions on food and water intake could be an option for millions of people with type 2 diabetes who prefer oral medications over injectables,' said Jeff Emmick, M.D., Ph.D., senior vice president of product development at Lilly. 'The positive ACHIEVE-1 results position orforglipron as a potential treatment option with meaningful A1C and weight reduction, and a safety profile similar to injectable GLP-1 therapies. We look forward to the four remaining global readouts from the ACHIEVE program, as well as results of the ATTAIN program in obesity, and working with regulators to bring this once-daily oral GLP-1 to people around the world.' The overall safety profile of orforglipron in ACHIEVE-1 was consistent with the established GLP-1 class. The most common adverse events for participants treated with orforglipron (3 mg, 12 mg and 36 mg, respectively) were diarrhea (19%, 21% and 26%) vs. 9% with placebo, nausea (13%, 18% and 16%) vs. 2% with placebo, dyspepsia (11%, 20% and 15%) vs. 7% with placebo, constipation (8%, 17% and 14%) vs. 4% with placebo, and vomiting (5%, 7% and 14%) vs. 1% with placebo. These gastrointestinal-related adverse events were generally mild-to-moderate in severity and occurred primarily during dose escalation. Overall treatment discontinuation rates due to adverse events were 6% (3 mg), 4% (12 mg) and 8% (36 mg) for orforglipron vs. 1% with placebo. No hepatic safety signal was observed. Later this year, Lilly expects to share topline results from ACHIEVE-2, evaluating orforglipron compared with dapagliflozin, and ACHIEVE-3, evaluating orforglipron compared to oral semaglutide, both in adults with type 2 diabetes inadequately controlled with metformin. ATTAIN-1 and ATTAIN-2, evaluating orforglipron for weight management, will also be shared in the third quarter of this year. Lilly remains on track to submit orforglipron for weight management to global regulatory agencies by the end of this year and for the treatment of type 2 diabetes in 2026. About orforglipron Orforglipron (or-for-GLIP-ron) is an investigational, once-daily small molecule (non-peptide) oral glucagon-like peptide-1 receptor agonist that can be taken any time of the day without restrictions on food and water intake.5 Orforglipron was discovered by Chugai Pharmaceutical Co., Ltd. and licensed by Lilly in 2018. Chugai and Lilly published the preclinical pharmacology data of this molecule together.6 Lilly is running Phase 3 studies on orforglipron for the treatment of type 2 diabetes and for weight management in adults with obesity or overweight with at least one weight-related medical problem. It is also being studied as a potential treatment for obstructive sleep apnea and hypertension in adults with obesity. About ACHIEVE-1 and the ACHIEVE clinical trial program ACHIEVE-1 (NCT05971940) is a Phase 3, 40-week, randomized, double-blind, placebo-controlled trial comparing the efficacy and safety of orforglipron 3 mg, 12 mg and 36 mg as monotherapy to placebo in adults with type 2 diabetes and inadequate glycemic control with diet and exercise alone. The trial randomized 559 participants across the U.S., China, India, Japan and Mexico in 1:1:1:1 ratio to receive either 3 mg, 12 mg or 36 mg orforglipron or placebo. The primary objective of the study was to demonstrate that orforglipron (3 mg, 12 mg, 36 mg) is superior in A1C reduction from baseline after 40 weeks, compared to placebo, in people with type 2 diabetes who have not taken any anti-diabetic medications for at least 90 days prior to visit 1, and are naïve to insulin therapy. Study participants had a HbA1c between ≥7.0% and ≤9.5% and a BMI of ≥23 kg/m2. All participants in the orforglipron treatment arms started the study at a dose of orforglipron 1 mg once-daily and then increased the dose in a step-wise approach at four-week intervals to their final randomized maintenance dose of 3 mg (via a 1 mg step), 12 mg (via steps at 1 mg, 3 mg and 6 mg) or 36 mg (via steps at 1 mg, 3 mg, 6 mg, 12 mg and 24 mg). Flexible dosing was not permitted. The ACHIEVE Phase 3 global clinical development program for orforglipron has enrolled more than 6,000 people with type 2 diabetes across five global registration trials. The program began in 2023 with results anticipated later this year and into 2026. About LillyLilly is a medicine company turning science into healing to make life better for people around the world. We've been pioneering life-changing discoveries for nearly 150 years, and today our medicines help tens of millions of people across the globe. Harnessing the power of biotechnology, chemistry and genetic medicine, our scientists are urgently advancing new discoveries to solve some of the world's most significant health challenges: redefining diabetes care; treating obesity and curtailing its most devastating long-term effects; advancing the fight against Alzheimer's disease; providing solutions to some of the most debilitating immune system disorders; and transforming the most difficult-to-treat cancers into manageable diseases. With each step toward a healthier world, we're motivated by one thing: making life better for millions more people. That includes delivering innovative clinical trials that reflect the diversity of our world and working to ensure our medicines are accessible and affordable. To learn more, visit and or follow us on Facebook, Instagram and LinkedIn. P-LLY The efficacy estimand represents the treatment effect had on all participants who adhered to the study drug (with possible dose interruptions) for 40 weeks without initiating additional antihyperglycemic medications (>14 days of use). American Diabetes Association. Standards of Care in Diabetes—2020 Abridged for Primary Care Providers. Clinical Diabetes 2020; 38(1):10–38. Percent of participants achieving A1C <5.7% across all doses was not controlled for Type 1 error. The treatment-regimen estimand represents the estimated average treatment effect regardless of treatment discontinuation or initiation of additional antihyperglycemic medications. Ma X, Liu R, Pratt EJ, Benson CT, Bhattachar SN, Sloop KW. Effect of Food Consumption on the Pharmacokinetics, Safety, and Tolerability of Once-Daily Orally Administered Orforglipron (LY3502970), a Non-peptide GLP-1 Receptor Agonist. Diabetes Ther. 2024 Apr;15(4):819-832. Epub 2024 Feb 24. PMID: 38402332; PMCID: PMC10951152. T. Kawai, B. Sun, H. Yoshino, D. Feng, Y. Suzuki, M. Fukazawa, S. Nagao, D.B. Wainscott, A.D. Showalter, B.A. Droz, T.S. Kobilka, M.P. Coghlan, F.S. Willard, Y. Kawabe, B.K. Kobilka, & K.W. Sloop, Structural basis for GLP-1 receptor activation by LY3502970, an orally active nonpeptide agonist, Proc. Natl. Acad. Sci. U.S.A. 117 (47) 29959-29967, (2020). Cautionary Statement Regarding Forward-Looking Statements This press release contains forward-looking statements (as that term is defined in the Private Securities Litigation Reform Act of 1995) about orforglipron as a potential treatment for adults with type 2 diabetes, and the timeline for future readouts, presentations, and other milestones relating to orforglipron and its clinical trials and reflects Lilly's current beliefs and expectations. However, as with any pharmaceutical product, there are substantial risks and uncertainties in the process of drug research, development, and commercialization. Among other things, there is no guarantee that planned or ongoing studies will be completed as planned, that future study results will be consistent with study results to date, that orforglipron will prove to be a safe and effective treatment for type 2 diabetes, that orforglipron will receive regulatory approval, or that Lilly will execute its strategy as expected. For further discussion of these and other risks and uncertainties that could cause actual results to differ from Lilly's expectations, see Lilly's Form 10-K and Form 10-Q filings with the United States Securities and Exchange Commission. Except as required by law, Lilly undertakes no duty to update forward-looking statements to reflect events after the date of this release. Trademarks and Trade Names All trademarks or trade names referred to in this press release are the property of the company, or, to the extent trademarks or trade names belonging to other companies are referenced in this press release, the property of their respective owners. Solely for convenience, the trademarks and trade names in this press release are referred to without the ® and ™ symbols, but such references should not be construed as any indicator that the company or, to the extent applicable, their respective owners will not assert, to the fullest extent under applicable law, the company's or their rights thereto. We do not intend the use or display of other companies' trademarks and trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies. Refer to: Brooke Frost; 317-432-9145 (Media) Michael Czapar; czapar_michael_c@ 317-617-0983 (Investors)
