Zepbound vs Orforglipron
Editorial comparison of Zepbound (tirzepatide) and Orforglipron (orforglipron). Same drug class context, trial-anchored data, no marketing claims.
Side-by-side
| Dimension | Zepbound | Orforglipron |
|---|---|---|
| Generic name | tirzepatide | orforglipron |
| Manufacturer | Eli Lilly | Eli Lilly |
| FDA approved | 2023 | 2026 |
| Mechanism | Tirzepatide is a dual incretin agonist: it hits both the GLP-1 receptor (like semaglutide) and the GIP receptor (which semaglutide doesn't). | Same target as injectable GLP-1s — the GLP-1 receptor — but a non-peptide small-molecule structure. |
| Dosing | Titrated 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg, every 4 weeks. Maintenance 5-15mg weekly depending on tolerability and target weight. | Once-daily oral tablet, titrated upward over several weeks to manage GI side effects. No fasting or water-timing restrictions (unlike Rybelsus). |
| Cost | List price ~$1,000-1,300/month. | $149/month via LillyDirect cash-pay at launch — meaningfully below branded injectable list prices. |
| Pivotal trial result | 20.9% mean body-weight reduction at 72 weeks (15 mg dose) | ~14-15% mean body-weight reduction in Phase 3 (highest dose) |
Full Zepbound review →
Dual GLP-1/GIP agonist for weight management. ~20% body weight loss in trials — strongest weight-loss drug currently available.
Full Orforglipron review →
First once-daily oral non-peptide GLP-1. Brand-only, launching via LillyDirect at $149/month. No injection, no compounded versions.
Frequently asked
Is Zepbound or Orforglipron more effective?+
In their pivotal trials, Zepbound reported 20.9% mean body-weight reduction at 72 weeks (15 mg dose), while Orforglipron reported ~14-15% mean body-weight reduction in Phase 3 (highest dose). Head-to-head results vary by patient profile, dose tolerated, and adherence — these trial numbers describe averages, not what every individual experiences.
How do Zepbound and Orforglipron compare on cost?+
Zepbound: List price ~$1,000-1,300/month. Lilly's patient assistance program (LillyDirect Self-Pay) offers $399-549/month for self-pay patients depending on dose. Insurance coverage similar pattern to Wegovy. Orforglipron: $149/month via LillyDirect cash-pay at launch — meaningfully below branded injectable list prices. Insurance coverage will expand through 2026-2027 as formularies add it. Real out-of-pocket depends on insurance formulary tier, manufacturer savings programs, and whether a direct-pay channel is available.
Can I switch from Zepbound to Orforglipron?+
Switching between brand-name treatments in the same drug class is common, but the conversion is not always 1:1. Discuss the switch with your prescriber — they'll usually re-titrate dosing rather than substitute equivalent strengths directly.
Are Zepbound and Orforglipron the same drug?+
No. Zepbound (tirzepatide) and Orforglipron (orforglipron) are distinct medications from Eli Lilly and Eli Lilly respectively. They may share a drug class or mechanism but differ in active ingredient, dosing, and approved use.