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Orforglipron demonstrates an acceptable safety profile in Japanese adults with type 2 diabetes over 52 weeksTrial shows safety of oral orforglipron for type 2 diabetes

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Key Takeaway
Orforglipron shows an acceptable safety profile in Japanese adults with type 2 diabetes over 52 weeks.

This Phase 3 randomized controlled trial was conducted to evaluate the safety of orforglipron in a specific demographic. The study population consisted of 401 Japanese adults diagnosed with type 2 diabetes. The trial was conducted in a multicentre setting involving 40 medical research centres and hospitals across Japan. The primary objective was to assess the safety of the medication over a 52-week period.

The intervention involved once-daily oral administration of orforglipron at three different dosage levels: 3 mg, 12 mg, and 36 mg. These doses were administered as an add-on to diet and exercise alone or in combination with one or two oral antihyperglycaemic medications. The study utilized a parallel-group design to compare the safety profiles across these different dosage levels.

Regarding the primary outcome of safety over 52 weeks, the data indicated that 339 participants (85%) experienced at least one treatment-emergent adverse event (TEAE). The 95% confidence interval for this proportion was 80.7-87.8. When analyzed by dose group, the frequency of TEAEs was higher in the 36-mg group compared to the 3-mg and 12-mg groups. Specifically, 88% (118 participants) in the 36-mg group experienced a TEAE (95% CI 81.5-92.5), compared to 81% (107 participants) in the 3-mg group (95% CI 73.5-86.8) and 84% (114 participants) in the 12-mg group (95% CI 77.4-89.6).

In terms of severity, the majority of these events were classified as mild or moderate. Specifically, 67% (267 participants) were mild (95% CI 61.8-71.0) and 16% (63 participants) were moderate (95% CI 12.5-19.6). Regarding treatment discontinuation, a higher rate was observed in the 36-mg group. Specifically, 14% (19 participants) in the 36-mg group discontinued due to an adverse event (95% CI 9.3-21.1), compared to 5% (7 participants) in the 3-mg group (95% CI 2.6-10.5) and 8% (11 participants) in the 12-mg group (95% CI 4.6-14.0). Gastrointestinal symptoms were identified as the most common TEAEs leading to discontinuation, with rates of 3.8% (5 participants) in the 3-mg group, 5.9% (8 participants) in the 12-mg group, and 8.2% (11 participants) in the 36-mg group.

Regarding hypoglycemia, level 2 hypoglycaemia occurred in both the 12-mg and 36-mg groups, with 2% (3 participants) in each group. No level 3 (severe) hypoglycaemia events were reported in any group. The 95% confidence intervals for level 2 hypoglycaemia were 0.8-6.3 for the 12-mg group and 0.8-6.4 for the 36-mg group.

Methodologically, the study was an open-label trial, which may introduce certain biases in reporting. The results provide evidence for the safety of orforglipron in a Japanese population, though the lack of a direct comparator medication limits the ability to assess relative safety. These findings contribute to the understanding of oral GLP-1 receptor agonists in the Japanese market. Clinical implications suggest that orforglipron has an acceptable safety profile for long-term use in patients with type 2 diabetes, though higher doses are associated with higher rates of gastrointestinal-related discontinuations. Questions remain regarding the long-term impact of these gastrointestinal symptoms on patient adherence and the specific mechanisms driving the dose-dependent increase in discontinuation rates.

How this fits prior evidence

How this fits prior evidence This study provides new data on the safety profile of orforglipron in a Japanese population. While it does not directly relate to the findings on resistance exercise, semaglutide psychiatric side effects, digital health interventions, body composition in GLP-1 receptor agonist users, or sarcopenia in Indian adults, it contributes to the broader landscape of managing type 2 diabetes with oral therapies.

Managing type 2 diabetes requires consistent treatment to keep blood sugar levels within a healthy range. For many people living with this condition, finding a medication that is both effective and easy to tolerate daily is a major goal. This study looked at the safety of a new oral medication called orforglipron to see how it performed over a year of use.

Researchers conducted a Phase 3 clinical trial involving 401 Japanese adults with type 2 diabetes. These participants were taking the medication as an addition to their usual diet and exercise routines. Some patients were already taking one or two other oral medications for their diabetes. The study took place across 40 different medical centers and hospitals, and it lasted for 52 weeks to monitor how the drug affected patients over a long period.

During the one-year study, the researchers looked closely at the safety of the drug at three different doses: 3 mg, 12 mg, and 36 mg. They found that while many people experienced some side effects, the vast majority were mild or moderate. Specifically, 67% of the issues reported were mild, and 16% were moderate. While the higher 36 mg dose did lead to more reported side effects and more people choosing to stop the medication compared to the lower doses, the overall safety profile was considered acceptable for the study period.

One specific area of concern in diabetes medication is hypoglycemia, which is when blood sugar drops too low. In this study, no severe cases of low blood sugar occurred. However, some mild cases were noted in the groups taking the 12 mg and 36 mg doses. The most common reasons people stopped taking the medication were related to stomach and intestinal issues, which were more frequent in the highest dose group.

It is important to keep these results in perspective. This study was an open-label trial, meaning the researchers knew which patients were receiving which dose. While the results are encouraging for the development of orforglipron, this single study does not mean the drug is a guaranteed fix for everyone. Because it was conducted specifically in a Japanese population, the results may not perfectly translate to all ethnicities or all types of diabetes management plans. For patients today, this means that orforglipron has shown it can be used safely for at least one year in a clinical setting. However, because this is still a specific clinical trial, patients should talk to their doctors about how this medication might fit into their personal treatment plan.

What this means for you:
A one-year trial showed orforglipron was generally well-tolerated by adults with type 2 diabetes.

Study Details

Study typeRct
Sample sizen = 132
EvidenceLevel 2
Follow-up12.0 mo
PublishedOct 2026
View Original Abstract ↓
BACKGROUND: Orforglipron, an oral GLP-1 receptor agonist, requires further evaluation in east Asian populations with type 2 diabetes, given this group's distinct pathophysiological characteristics. This study aimed to assess orforglipron as add-on treatment to diet and exercise alone or to oral antihyperglycaemic medications in Japanese participants with type 2 diabetes. METHODS: This multicentre, randomised, open-label phase 3 study was conducted in 40 medical research centres and hospitals in Japan. Adults with type 2 diabetes and elevated glucose levels managing their condition with diet and exercise alone or with one or two oral antihyperglycaemic medications were assigned (1:1:1) via computer-generated random sequence to receive once-daily oral orforglipron (3 mg, 12 mg, or 36 mg). Randomisation was stratified by background therapy, baseline HbA (≤8·5% or >8·5%), and metformin use (yes vs no; applied only to α-glucosidase inhibitors, thiazolidinedione, and glinides). Investigators, participants, and site staff were not masked to treatment. The primary endpoint was safety for 52 weeks, assessed in all randomly assigned participants who received at least one dose of orforglipron. This study is registered with ClinicalTrials.gov, NCT06010004 (ACHIEVE-J). FINDINGS: Between Sept 28, 2023, and June 5, 2025, 450 participants were screened and 401 were randomly assigned to three groups (3 mg, n=132; 12 mg, n=135; and 36 mg, n=134). 352 (88%) completed study treatment. 339 participants (85%, 95% CI 80·7-87·8) had at least one treatment-emergent adverse event (TEAE), more frequently in the 36-mg group (118 [88%, 95% CI 81·5-92·5]) than in the 3-mg (107 [81%, 73·5-86·8]) and 12-mg (114 [84%, 77·4-89·6]) groups. Most TEAEs were of mild (267 [67%, 61·8-71·0]) or moderate (63 [16%, 12·5-19·6]) severity. Discontinuations due to an adverse event occurred in 19 of 134 participants (14%, 95% CI 9·3-21·1) in the 36-mg group compared with seven of 132 (5%, 2·6-10·5) in the 3-mg group and 11 of 135 (8%, 4·6-14·0) in the 12-mg group. Across treatment groups, gastrointestinal symptoms were the most common TEAEs leading to study treatment discontinuation (3 mg: 5 [3·8%, 1·6-8·6]; 12 mg: 8 [5·9%, 3·0-11·3]; and 36 mg: 11 [8·2%, 4·7-14·1]). Level 2 (blood glucose <54 mg/dL) hypoglycaemia events occurred in three of 135 participants in the 12-mg group (2%, 0·8-6·3) and in three of 134 in the 36-mg group (2%, 0·8-6·4) groups. No level 3 (severe) hypoglycaemia events occurred. Outcomes were generally similar across background therapies. INTERPRETATION: Treatment with orforglipron in combination with diet and exercise alone or one or two oral antihyperglycaemic medications for 52 weeks demonstrated an acceptable safety profile in Japanese adults with type 2 diabetes. FUNDING: Eli Lilly. TRANSLATION: For the Japanese translation of the abstract see Supplementary Materials section.
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