Orforglipron

Orforglipron (Foundayo, development code LY3502970) is a once-daily oral GLP-1 receptor agonist, originally discovered at Chugai Pharmaceutical and out-licensed in 2018.

Educational summaryNon-peptide compound reference

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Dosing & scaling, explained

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Evidence context

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Storage, handling and interpretation

Product identity

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Storage & handling

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Prepared solutions

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Reported protocols for Orforglipron

What published studies and recent community write-ups report about amounts, timing and course length. 9 clinical and 4 community-reported rows, each linked to its source. These are descriptions of what others report, not instructions, and nothing here is medical advice.

ContextDoseFrequencyRouteCourseSource
Clinical9 rows
FDA label, Foundayo tabletsAdults with obesity, or overweight with at least one weight-related condition0.8 mg to start, then 2.5 mg, 5.5 mg, and optionally 9 mg, 14.5 mg or 17.2 mg; maximum 17.2 mgOnce daily, any time of day, with or without foodOral tablet, swallowed whole, one tablet per dayLong-term; at least 30 days at each dosage level before stepping upNone; if 7 or more consecutive doses are missed, escalation is restarted at a lower dosageDailyMed, National Library of Medicine2026
The label ties the stepwise escalation directly to reducing gastrointestinal reactions and makes each increase conditional on response and tolerability. It caps the dose at 9 mg with a strong CYP3A4 inhibitor, carries a boxed warning about thyroid C-cell tumours (contraindicated with a personal or family history of medullary thyroid carcinoma or MEN 2), and advises women on oral contraceptives to add or switch to a non-oral method for 30 days after starting and after each escalation.
Phase 3 ATTAIN-1 (obesity without diabetes)3,127 adults with obesity, or overweight with a comorbidity, and no diabetes6, 12 or 36 mg maintenance (capsule doses), starting at 1 mgOnce dailyOral72 weeksNone; dose reduction was allowed only for gastrointestinal tolerability after other measures failedNew England Journal of Medicine (PubMed)2025
Mean weight change at 72 weeks was 7.5%, 8.4% and 11.2% on 6, 12 and 36 mg versus 2.1% on placebo by the treatment-regimen estimand, and on 36 mg 54.6% of patients lost at least 10% and 18.4% at least 20%. Waist circumference, systolic blood pressure, triglycerides and non-HDL cholesterol all improved, and adverse events led 5.3% to 10.3% of treated patients to stop versus 2.7% on placebo.
Phase 3 ATTAIN-1 dose-escalation ladderAdults randomized to orforglipron in ATTAIN-1 and ATTAIN-21 mg start, then 3, 6, 12 and 24 mg steps toward 6, 12 or 36 mg maintenanceOnce daily, stepping up every 4 weeksOral4-20 weeks of escalation depending on the target dose, then maintenance to week 72None; dose reduction permitted only for gastrointestinal tolerabilityManufacturer investor release2025
The sponsor describes a fixed ladder: 6 mg reached through 1 and 3 mg, 12 mg through 1, 3 and 6 mg, and 36 mg through 1, 3, 6, 12 and 24 mg, each held four weeks. The company notes the trial paired the drug with a balanced healthy diet rather than a reduced-calorie diet, and required a history of at least one unsuccessful dieting attempt for entry.
Phase 3 ATTAIN-2 (obesity with type 2 diabetes)1,613 adults with a BMI of 27 or more, type 2 diabetes and HbA1c of 7-10%6, 12 or 36 mg maintenance, starting at 1 mgOnce dailyOral72 weeks after a dose-escalation phaseNoneThe Lancet (PubMed)2026
Mean weight change at 72 weeks was 5.1%, 7.0% and 9.6% on 6, 12 and 36 mg versus 2.5% on placebo by the treatment-regimen estimand, with every prespecified weight and cardiometabolic measure including HbA1c improving. Discontinuation for adverse events ran 6.1% to 9.9% against 4.1% on placebo, and gastrointestinal events were mostly mild to moderate and clustered during escalation.
Phase 3 ACHIEVE-1 (early type 2 diabetes)559 adults with type 2 diabetes managed by diet and exercise alone, HbA1c 7.0-9.5%, BMI 23 or more3, 12 or 36 mgOnce dailyOral40 weeksNoneNew England Journal of Medicine (PubMed)2025
HbA1c fell 1.24, 1.47 and 1.48 percentage points from a baseline of 8.0% against 0.41 on placebo, landing patients at 6.5-6.7%, while weight fell 4.5%, 5.8% and 7.6% versus 1.7% on placebo. No severe hypoglycemia occurred and 4.4% to 7.8% of treated participants stopped for adverse events against 1.4% on placebo.
Phase 3 ACHIEVE-3 (head to head with oral semaglutide)1,698 adults with type 2 diabetes inadequately controlled on metformin, BMI 25 or more12 mg or 36 mg orforglipron against oral semaglutide 7 mg or 14 mgOnce daily, after an up-to-4-week lead-inOral52 weeksNoneThe Lancet (PubMed)2026
From a baseline HbA1c of 8.3%, reductions were 1.71% and 1.91% on orforglipron 12 and 36 mg against 1.23% and 1.47% on semaglutide 7 and 14 mg, so both orforglipron doses were superior to both comparator doses. Gastrointestinal events (58-59% versus 37-45%), discontinuation for adverse events (9-10% versus 4-5%) and mean pulse rise (3.7-4.7 bpm versus 1.0-1.5 bpm) were all higher with orforglipron.

How a course is commonly described

  1. Days 1-30: 0.8 mgClinical

    The label starts everyone at 0.8 mg once daily, held for at least 30 days, explicitly to limit gastrointestinal reactions. Tablets are swallowed whole at any time of day, with or without food, and no more than one tablet is taken per day.

  2. Days 31-90: 2.5 mg, then 5.5 mgCommunity-reported

    Two further steps follow, each after at least 30 days, bringing the patient to 5.5 mg by around month three. Community guides treat 5.5 mg as a decision point: stay there if the response is adequate, or keep stepping if not.

  3. Month 4 onward: 9, 14.5 or 17.2 mgClinical

    Each additional step requires at least 30 days at the current dosage and is conditional on response and tolerability, with 17.2 mg the ceiling. The maximum drops to 9 mg if a strong CYP3A4 inhibitor is taken alongside.

  4. Weeks 4-40: when change showsCommunity-reported

    Community guides place appetite changes in the first 2-4 weeks, visible weight change from weeks 4-8, and most of the loss accumulating between weeks 12 and 40 as the dose climbs. Trials measured their primary endpoint much later, at 40 weeks for the diabetes programme and 72 weeks for obesity.

  5. Handling a missed dose or a hard stepCommunity-reported

    The label says to take a missed dose as soon as possible without doubling up, and to restart escalation at a lower dosage if 7 or more consecutive doses are missed. Community practice for a badly tolerated step is to drop back one level for an extra four weeks and retry.

  6. Trial maintenance for comparisonClinical

    ATTAIN-1 ran maintenance at 6, 12 or 36 mg capsule doses to week 72, producing mean weight reductions of 7.5%, 8.4% and 11.2% against 2.1% on placebo. Those capsule figures are not the tablet strengths on the label, which run 0.8 to 17.2 mg for equivalent exposure.

  • Trial papers and the approved label use two different dose scales: phase 3 reports describe capsules of 1 to 36 mg, while the marketed tablets are 0.8 to 17.2 mg for equivalent exposure. A 36 mg trial dose and a 17.2 mg tablet are the same exposure, not a reduction.
  • Gastrointestinal effects dominate the safety record in every trial and cluster during escalation, which is why the label fixes a minimum of 30 days per step and why missing a week of doses means restarting lower. Discontinuation for adverse events ran 5-10% across the obesity trials and up to 20% in a diabetes comparison against dapagliflozin.
  • The drug is approved only for long-term weight management in the United States; diabetes submissions are still under review, and trials in sleep apnoea, hypertension, osteoarthritis pain and peripheral arterial disease are ongoing. It carries a boxed warning for thyroid C-cell tumours and is contraindicated with a personal or family history of medullary thyroid carcinoma or MEN 2. The rows above record what sources report, not endorsements of use.
Sources for this section (13)
  1. FOUNDAYO (orforglipron) tablets: Prescribing InformationDailyMed, National Library of Medicine2026Clinical
  2. Orforglipron: First ApprovalDrugs (PubMed)2026Clinical
  3. Orforglipron, an Oral Small-Molecule GLP-1 Receptor Agonist for Obesity TreatmentNew England Journal of Medicine (PubMed)2025Clinical
  4. Orforglipron demonstrated meaningful weight loss and cardiometabolic improvements in complete ATTAIN-1 results published in The New England Journal of Medicine (sponsor press release)Manufacturer investor release2025Clinical
  5. Orforglipron, an oral small-molecule GLP-1 receptor agonist, for the treatment of obesity in people with type 2 diabetes (ATTAIN-2): a phase 3, double-blind, randomised, multicentre, placebo-controlled trialThe Lancet (PubMed)2026Clinical
  6. Orforglipron, an Oral Small-Molecule GLP-1 Receptor Agonist, in Early Type 2 DiabetesNew England Journal of Medicine (PubMed)2025Clinical
  7. Efficacy and safety of once-daily oral orforglipron compared with oral semaglutide in adults with type 2 diabetes (ACHIEVE-3): a multinational, multicentre, non-inferiority, open-label, randomised, phase 3 trialThe Lancet (PubMed)2026Clinical
  8. Orforglipron compared with dapagliflozin in adults with type 2 diabetes and inadequate glycaemic control with metformin (ACHIEVE-2): a multicentre, randomised, non-inferiority, open-label, phase 3 trialThe Lancet (PubMed)2026Clinical
  9. Cardiovascular safety of orforglipron versus insulin glargine in adults with type 2 diabetes at increased cardiovascular risk (ACHIEVE-4): a phase 3, event-driven, randomised, open-label, non-inferiority, active comparator trialThe Lancet (PubMed)2026Clinical

Plus 4 community resources (dosing guides, forum threads and vendor write-ups), reported above but not linked.

How Orforglipron is being studied to work

This process map organizes available educational context. Individual claims remain subject to source-level verification.

  1. 1

    Mechanism of Action

    How orforglipron works as an oral GLP-1 receptor agonist

Overview

Orforglipron (Foundayo, development code LY3502970) is a once-daily oral GLP-1 receptor agonist, originally discovered at Chugai Pharmaceutical and out-licensed in 2018. Unlike semaglutide and tirzepatide it is not a peptide at all but a small synthetic molecule that activates the same receptor, which is why it can be swallowed as an ordinary tablet with no food, water or refrigeration restrictions. The FDA approved it in April 2026 for long-term weight management in adults with obesity, or overweight plus a weight-related condition, alongside a reduced-calorie diet and more physical activity; regulatory submissions for weight management and type 2 diabetes are pending elsewhere. Its phase 3 programme is unusually large for a new entrant, covering obesity (ATTAIN), type 2 diabetes (ACHIEVE) and ongoing trials in sleep apnoea, hypertension, osteoarthritis pain and peripheral arterial disease.

What researchers are exploring

These themes organize the educational information currently available. Individual claims remain under source review and are not treatment claims.

  • 1

    Mechanism of Action

    How orforglipron works as an oral GLP-1 receptor agonist

  • 2

    Why Orforglipron Matters

    What makes it different from older oral and injectable GLP-1 options

  • 3

    Clinical Trial Findings

    Weight loss and glycemic-control outcomes described in the provided article

  • 4

    Weight Loss & Blood Sugar Control

    How the reported outcomes position orforglipron in the GLP-1 field

  • 5

    Advantages Over Peptide GLP-1 Drugs

    Manufacturing, access, and practical advantages

  • 6

    Future Outlook

    What still needs to be proven

What is known and what still needs verification

Available context is organized without assigning unsupported study models or evidence grades.

  • Not graded

    Research Status & Clinical Development

    Current development stage and why no consumer dosing guide is shown

  • Not graded

    Mechanism of Action

    How orforglipron works as an oral GLP-1 receptor agonist

  • Not graded

    Why Orforglipron Matters

    What makes it different from older oral and injectable GLP-1 options

  • Not graded

    Clinical Trial Findings

    Weight loss and glycemic-control outcomes described in the provided article

Chemistry identifiers

Sequence, synonyms and registry identifiers as recorded in PubChem, the National Library of Medicine's open chemistry database. Formula, mass and CAS number are summarized at the top of the page.

Also listed as

Foundayo, LY3502970, LY-3502970, OWL833, UNII 7ZW40D021M, CHEMBL4446782, GTPL12175

InChIKey

USUWIEBBBWHKNI-KHIFEHGGSA-N

Drug Name

Orforglipron

Development Code

LY-3502970

Half-Life

Approximately 29 to 49 hours across tested doses

IUPAC name

3-[(1S,2S)-1-[5-[(4S)-2,2-dimethyloxan-4-yl]-2-[(4S)-2-(4-fluoro-3,5-dimethylphenyl)-3-[3-(4-fluoro-1-methylindazol-5-yl)-2-oxoimidazol-1-yl]-4-methyl-6,7-dihydro-4H-pyrazolo[4,3-c]pyridine-5-carbonyl]indol-1-yl]-2-methylcyclopropyl]-4H-1,2,4-oxadiazol-5-one

Limitations and unknowns

Important limitations

  • Safety & Tolerability: The main limitation highlighted by the current source

Sources

0 links carried over from the earlier page, awaiting verification.