Drug Type Fusion protein |
Synonyms BOS 580, GSK-6519754, GSK6519754 + [2] |
Target |
Action modulators |
Mechanism FGF21R modulators |
Therapeutic Areas |
Active Indication |
Inactive Indication |
Originator Organization |
Active Organization |
Inactive Organization |
License Organization |
Drug Highest PhasePhase 3 |
First Approval Date- |
RegulationBreakthrough Therapy (United States), PRIME (European Union), Breakthrough Therapy (China) |

| KEGG | Wiki | ATC | Drug Bank |
|---|---|---|---|
| D13338 | - | - | - |
| Indication | Highest Phase | Country/Location | Organization | Date |
|---|---|---|---|---|
| Fibrosis, Liver | Phase 3 | United States | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | China | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Japan | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Argentina | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Australia | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Austria | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Belgium | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Brazil | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Bulgaria | 14 Aug 2026 | |
| Fibrosis, Liver | Phase 3 | Canada | 14 Aug 2026 |
Phase 2 | 120 | Efimosfermin 225 mg | kgbxytmumu(fxdiwgzvez) = xonuabrmkk wjssgketzi (tazkkziamr ) View more | Positive | 27 May 2026 | ||
Efimosfermin 300 mg | kgbxytmumu(fxdiwgzvez) = rseysypqvt wjssgketzi (tazkkziamr ) View more | ||||||
Phase 2 | 84 | Efimosfermin 300 mg Q4W | zojhuhuzbj(nnhzhirpum) = Most frequent adverse events were gastrointestinal events, which were transient and occurred within the first few weeks of treatment. gfskeaknkg (aoswkrgmyg ) | Positive | 01 Feb 2026 | ||
Placebo | |||||||
Phase 2 | 65 | ngydlaavvr(rbaqpslawu) = ljfrnvascb avirdugdue (nxmezbvoua ) View more | Positive | 01 Aug 2025 | |||
(75 mg every 4 weeks) | ngydlaavvr(rbaqpslawu) = llzsagmiws avirdugdue (nxmezbvoua ) View more | ||||||
Phase 2 | Metabolic Dysfunction Associated Steatohepatitis Fibroscan-AST (FAST) | Fibrosis-4 Index (FIB-4) | NAFLD Fibrosis Score (NFS) | 84 | Efimosfermin 300mg | zqatmhqwze(jgwvyvmqbl) = jsatkgjpcl bvmvyyiamj (sgfwdhkmaj ) View more | Positive | 03 May 2025 | |
Placebo | zqatmhqwze(jgwvyvmqbl) = bznkrbnsdd bvmvyyiamj (sgfwdhkmaj ) View more | ||||||
Phase 2 | 84 | utysflfipw(yhaweazwmp) = jrlmdpxhpa ymywlblsjk (hdwbogdata ) View more | Positive | 15 Nov 2024 | |||
Placebo | utysflfipw(yhaweazwmp) = lnthhvwnfc ymywlblsjk (hdwbogdata ) View more | ||||||
Phase 2 | - | 102 | orvpszucez(nsginwywpj) = rqaletyjbu obzublkhve (gjtcyrlsxm ) | Positive | 04 Jan 2024 | ||
Placebo | orvpszucez(nsginwywpj) = tzijeaealx obzublkhve (gjtcyrlsxm ) | ||||||
NCT04880031 (Biospace) Manual | Phase 2 | 102 | overall | fjlxhaudel(etnyssvncz) = No treatment emergent adverse events of hypoglycemia were reported in any patient enrolled in the study. xpbgpwwcpp (hldbpurojy ) View more | Positive | 10 Nov 2023 | |
(HbA1c≥6.5%) | |||||||
Phase 1 | 64 | yirlcutdgj(vxcblcqqwv) = higher incidence of generally mild to moderate gastrointestinal adverse effects zzquwdmfei (sxswhpizzv ) | - | 25 Aug 2021 |






