Glucose Disposal & Glycemic Control
In a 26-week multicentre trial in type 2 diabetes (n=383), orforglipron reduced HbA1c up to –2.10% and body weight by –10.1 kg, significantly outperforming placebo and matching/exceeding dulaglutide at higher doses [3]. A 12-week Phase 1b trial reported HbA1c reductions of –1.5% to –1.8% with up to –5.8 kg weight loss [4].
Appetite & Weight Regulation
In a 36-week obesity study, orforglipron produced –9.4% to –14.7% weight reduction vs –2.3% with placebo, with 46–75% of participants achieving ≥10% weight loss depending on dose [1][2]. Improvements were observed in all prespecified cardiometabolic measures, including waist circumference, blood pressure, and lipid markers.
Oral Pharmacology & PK
Unlike oral peptide GLP-1 formulations, orforglipron does not require an absorption enhancer or fasting. AUC and Cmax decrease ~18–24% with food, but this is not clinically significant [6]. Half-life ~29–49 h supports once-daily dosing [4].
Safety & Tolerability
Across Phase 2 and Phase 3 programs, the safety profile was consistent with injectable GLP-1 RAs. GI events (nausea, diarrhea, dyspepsia, vomiting) were most common and dose-related, occurring mainly during titration [3][5]. In Phase 3 (ACHIEVE-1), discontinuations due to AEs were 4–8% vs 1% with placebo, and no hepatic safety signals were detected [5].
References
- Wharton S, et al. NEJM 2023. Orforglipron in obesity: –9.4% to –14.7% weight loss at 36 weeks; improvements in cardiometabolic measures. https://pubmed.ncbi.nlm.nih.gov/37351564/
- Wharton S, et al. NEJM 2023. Dose-dependent weight loss (–8.6% to –12.6% at 26 weeks) in obesity without diabetes. https://pubmed.ncbi.nlm.nih.gov/37351564/
- Frias JP, et al. Lancet 2023. Phase 2 T2D: HbA1c ↓ up to –2.10%; weight ↓ up to –10.1 kg; greater efficacy than dulaglutide at high dose. https://cardiometabolicforum.com/publications/99
- Pratt E, et al. Diabetes Obes Metab 2023. Phase 1b: HbA1c –1.5% to –1.8%, weight loss –5.8 kg; t½ ~29–49 h. https://pubmed.ncbi.nlm.nih.gov/37264711/
- Lilly Press Release 2025. Phase 3 ACHIEVE-1: HbA1c ↓ –1.3% to –1.6%; weight ↓ –7.9%; GI AEs dose-related; no hepatic signal. https://www.prnewswire.com/news-releases/lillys-oral-glp-1-orforglipron-demonstrated-statistically-significant-efficacy-results-and-a-safety-profile-consistent-with-injectable-glp-1-medicines-in-successful-phase-3-trial-302430985.html
- Ma X, et al. Diabetes Therapy 2024. Food-effect PK: AUC/Cmax ↓ ~18–24% fed vs fasted; overall well-tolerated; no SAEs. https://link.springer.com/article/10.1007/s13300-024-01554-1
Note: BioZapetite is supplied strictly for investigational research use only. It is not approved or intended for diagnostic, therapeutic, or in vivo applications in humans or animals.
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