Drugs / Insulin Efsitora Alfa
last change May 2026 re-read 2 minutes ago

Insulin Efsitora Alfa

also known as LY3209590 · efsitora · BIF · insulin efsitora

Protein / enzyme biologic

Developed for
type 2 diabetes mellitus · type 1 diabetes mellitus
Investigated by
Eli Lilly and Company

Trials 19 · a red edge is where a trial was stopped

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 111 trials
Phase 1 NCT06362265 Oct 2024 → Jan 2026 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT06169982 Dec 2023 → Jul 2024 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT05914688 Jun 2023 → Jan 2024 Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT05596747 Nov 2022 → Oct 2023 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT05615532 Nov 2022 → Jun 2023 Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT04957914 Jul 2021 → Oct 2022 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT04768842 Mar → Sep 2021 Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT04276428 Feb → Nov 2020 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT03603704 Aug 2018 → May 2019 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 1 NCT03367377 Jan → Oct 2018 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 23 trials
Phase 2 NCT04450407 Jul 2020 → Oct 2021 type 1 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 2 NCT04450394 Jul 2020 → Oct 2021 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 2 NCT03736785 Nov 2018 → Feb 2020 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 35 trials
Phase 3 NCT05662332 Jan 2023 → Jul 2024 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 3 NCT05463744 Aug 2022 → May 2024 type 1 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 3 NCT05462756 Aug 2022 → Feb 2024 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 3 NCT05362058 Jun 2022 → Apr 2024 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded
Phase 3 NCT05275400 Mar 2022 → May 2024 type 2 diabetes mellitus Eli Lilly and Company Completed No outcome recorded

Evidence & citations 7 cited values

Every value below carries the sentence it was read from. 25 sources stand behind the page.

FieldValueCited text
Known as insulin efsitora alfa “This analysis aimed to assess the safety and tolerability of insulin efsitora alfa (efsitora, basal insulin Fc, LY3209590) and characterize the pharmacokinetic and...” PMID 39928225 Feb 2025
7

“Basal insulin Fc (BIF, insulin efsitora alfa), designed for once-weekly administration, is a fusion protein combining a novel single-chain insulin variant with a human...” PMID 36758572 Feb 2023

“Basal insulin Fc (BIF) (insulin efsitora alfa; LY3209590), a fusion protein combining a novel single-chain insulin variant with a human IgG Fc domain” PMID 36944059 May 2023

NCT05463744

NCT05662332

NCT05275400

NCT05362058

NCT05462756

Known as BIF “Basal insulin Fc (BIF, insulin efsitora alfa), designed for once-weekly administration, is a fusion protein combining a novel single-chain insulin variant with a human...” PMID 36758572 Feb 2023
1

“Basal insulin Fc (BIF) (insulin efsitora alfa; LY3209590), a fusion protein combining a novel single-chain insulin variant with a human IgG Fc domain” PMID 36944059 May 2023

Known as efsitora “This analysis aimed to assess the safety and tolerability of insulin efsitora alfa (efsitora, basal insulin Fc, LY3209590) and characterize the pharmacokinetic and...” PMID 39928225 Feb 2025
4

“Participants received 500 units per milliliter (U/mL) Insulin Efsitora Alfa (insulin efsitora) administered subcutaneously (SC) once weekly (QW) along with 100 U/mL insulin...” NCT05462756

“Plain Language Summary: Insulin efsitora alfa (efsitora) is an innovative once-weekly basal insulin treatment evaluated in the Phase 3 QWINT clinical trials.” PMID 41591636 Jan 2026

“The phase 3 QWINT-2 study demonstrated that once-weekly insulin efsitora alfa (efsitora) was noninferior to once-daily insulin degludec” PMID 42177728 May 2026

“Insulin efsitora alfa (efsitora) is a once-weekly basal insulin.” PMID 39270686 Sep 2024

Known as insulin efsitora “Participants received 500 units per milliliter (U/mL) Insulin Efsitora Alfa (insulin efsitora) administered subcutaneously (SC) once weekly (QW) along with 100 U/mL insulin...” NCT05462756
1

“Participants received 500 units per milliliter (U/mL) Insulin Efsitora Alfa (insulin efsitora) administered subcutaneously (SC) once weekly (QW).” NCT05275400

Known as LY3209590 ClinicalTrials.gov intervention name — accepted as the source's own label NCT05596747
13

NCT02942914

NCT06362265

NCT04768842

NCT06169982

NCT03736785

NCT04450407

NCT05914688

NCT04450394

NCT04276428

NCT03603704

NCT05615532

NCT03367377

NCT04957914

Modality Protein / enzyme biologic “is a fusion protein combining a novel single-chain insulin variant with a human immunoglobulin G (IgG) Fc domain.” PMID 36758572 Feb 2023
Route Subcutaneous “LY3209590 administered subcutaneously (SC).” NCT02942914