# A Clinical Trial of Study Medicine (Marstacimab) in Pediatric Patients With Hemophilia A or Hemophilia B

> **NCT05611801** · PHASE3 · RECRUITING · sponsor: **Pfizer** · enrollment: 100 (estimated)

## Conditions studied

- Hemophilia A
- Hemophilia B

## Interventions

- **DRUG:** marstacimab

## Key facts

- **NCT ID:** NCT05611801
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** RECRUITING
- **Start date:** 2022-12-09
- **Primary completion:** 2028-09-10
- **Final completion:** 2028-09-10
- **Target enrollment:** 100 (ESTIMATED)
- **Last updated:** 2026-05-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05611801

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05611801, "A Clinical Trial of Study Medicine (Marstacimab) in Pediatric Patients With Hemophilia A or Hemophilia B". Retrieved via AI Analytics 2026-06-26 from https://api.ai-analytics.org/clinical/NCT05611801. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*