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Medi-546

Phase 3

Systemic Lupus Erythematosus | Small molecule | Immunology |AstraZeneca PLC|Last Updated: Jul 27, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedPLACEBO_CONTROLLED
Total Trials2
Total Enrollment384

FDA Designations

No designations recorded

Clinical trial landscape

Medi-546 · 3 trials · 2 indications

Phase 3 1Phase 2 1Phase 1 1
NCT04877691Subcutaneous Anifrolumab in Adult Patients With Systemic Lupus ErythematosusSystemic Lupus Erythematosus
ACTIVE NOT_RECRUITING367 Analytics
PHASE3ACTIVE NOT_RECRUITING
Subcutaneous Anifrolumab in Adult Patients With Systemic Lupus Erythematosus
Systemic Lupus ErythematosusUnlock trial analytics

Study Endpoints

Primary Endpoints

British Isles Lupus Assessment Group-based Composite Lupus Assessment (BICLA) response
At week 52

BICLA response is a composite binary endpoint whereby responders are defined by meeting all of the following criteria: * Improvement from baseline in disease activity as measured by BILAG-2004. Improvement is defined as a reduction of all baseline BILAG-2004 A to B/C/D and baseline BILAG-2004 B to C/D and no BILAG-2004 worsening in other organ systems, where worsening is defined as ≥ 1 new BILAG-2004 A or ≥ 2 new BILAG 2004 B. * No worsening from baseline in SLEDAI-2K, where worsening is defined as an increase from baseline of \> 0 points in SLEDAI-2K. * No worsening from baseline in the patient's lupus disease activity, where worsening is defined as an increase ≥ 0.30 points on a 3-point PGA VAS.

Overall Summary of Adverse Events
Stage I (up to 48 weeks)
The safety and tolerability of MEDI-546 will be assessed primarily by summarizing treatment-emergent AEs and SAEs.
Study Day 84 for single-dose; Study Day 105 for multi-dose

Secondary Endpoints

Time to first BICLA response sustained through Week 52
Baseline through to Week 52
BICLA response with maintained low (or reduced) use of oral corticosteroid (OCS)
At week 52
Time to flare
Baseline through to Week 52
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Study Design & Arms

AllocationRANDOMIZED
MaskingSINGLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
AnifrolumabEXPERIMENTALSolution for injection in aPFS
PlaceboPLACEBO_COMPARATORSolution for injection in aPFS
1EXPERIMENTALMEDI-546 100 mg IV
2EXPERIMENTALMEDI-546 300 mg IV
3EXPERIMENTALMEDI-546 1000 mg IV
4OTHERMEDI-546
5OTHERMEDI-546
6OTHERMEDI-546
7OTHERMEDI-546
8OTHERMEDI-546
9OTHERMEDI-546

Interventions

NameTypeDescription
Medi-546DRUGPatients will have IP administered or will self-administer IP under supervision by site staff at Week 0 and Week 1 and, for patients participating in the OLE period, at Week 52. For weekly doses coinciding with subsequent on-site visits, patients will also have IP administered or will self-administer IP under supervision by site staff, and in addition will receive a set of kits (including back-up kits) for at-home administration.
PlaceboDRUGSolution for injection in aPFS
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites140

Inclusion Criteria: 1. Patients who have a diagnosis of pediatric or adult SLE according to the ACR 1997 revised criteria for ≥ 24 weeks prior to signing the ICF 2. To be eligible a patient must have SLEDAI-2K ≥ 6 points and "Clinical" SLEDAI-2K score ≥4 points at screening 3. BILAG2004 with at lea...

Countries:United StatesArgentinaBulgariaChileColombiaGermanyHungaryJapanMexicoPhilippinesPolandSpainThailandUkraineUnited Kingdom
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Recent Changes (Last 90 Days)

LOWJul 27, 2026NCT04877691lastUpdatePostDate: changed
LOWJul 27, 2026NCT04877691lastUpdatePostDate: changed
LOWJul 27, 2026NCT04877691lastUpdatePostDate: changed
LOWJun 23, 2026NCT04877691lastUpdatePostDate: changed
LOWJun 23, 2026NCT04877691lastUpdatePostDate: changed

Frequently asked questions about Medi-546

What is MEDI-546 used for?

MEDI-546 is an investigational drug being studied for the treatment of Systemic Lupus Erythematosus (SLE) and Scleroderma. It is being developed by AstraZeneca PLC (AZN) and is currently in clinical trials to evaluate its safety and efficacy in these autoimmune conditions.

What does MEDI-546 target?

MEDI-546 targets the type I interferon receptor, which plays a key role in the immune system's inflammatory response. By blocking this receptor, the drug aims to reduce the abnormal immune activity that contributes to autoimmune diseases like Systemic Lupus Erythematosus and Scleroderma.

Who makes MEDI-546?

MEDI-546 is being developed by AstraZeneca PLC, a multinational pharmaceutical company listed on the stock exchange under the ticker symbol AZN. AstraZeneca is conducting clinical trials to evaluate the drug's safety and efficacy for autoimmune indications.

What phase is MEDI-546 in?

MEDI-546 is in clinical development. It has completed Phase 1 and Phase 2 trials, and a Phase 3 trial is currently active but not recruiting participants. The drug is investigational and has not yet been approved by regulatory authorities.

What clinical trials is MEDI-546 in?

MEDI-546 has been studied in several clinical trials. NCT00930683 was a Phase 1 trial in scleroderma, NCT01559090 was a Phase 2 trial in Japanese patients with Systemic Lupus Erythematosus, and NCT04877691 is an active Phase 3 trial for subcutaneous administration in SLE patients.

Is MEDI-546 the same as anifrolumab?

Yes, MEDI-546 is also known as anifrolumab. The Phase 3 trial NCT04877691 is titled 'Subcutaneous Anifrolumab in Adult Patients With Systemic Lupus Erythematosus,' confirming that MEDI-546 and anifrolumab refer to the same drug.