# Phase 1 Safety and Tolerability Study of REGN9533 in Healthy Adults

> **NCT06665828** · PHASE1 · COMPLETED · sponsor: **Regeneron Pharmaceuticals** · enrollment: 72 (actual)

## Conditions studied

- Healthy Volunteer

## Interventions

- **DRUG:** REGN9533
- **DRUG:** Matching Placebo

## Key facts

- **NCT ID:** NCT06665828
- **Lead sponsor:** Regeneron Pharmaceuticals
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2025-03-04
- **Primary completion:** 2026-01-29
- **Final completion:** 2026-01-29
- **Target enrollment:** 72 (ACTUAL)
- **Last updated:** 2026-02-06


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT06665828

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT06665828, "Phase 1 Safety and Tolerability Study of REGN9533 in Healthy Adults". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT06665828. Licensed CC0.

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