# The Prevstain Trial

> **NCT04203043** · PHASE2 · UNKNOWN · sponsor: **University of Sao Paulo General Hospital** · enrollment: 338 (estimated)

## Conditions studied

- Varicose Veins

## Interventions

- **DRUG:** Pycnogenol Oral Product
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT04203043
- **Lead sponsor:** University of Sao Paulo General Hospital
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2020-02-28
- **Primary completion:** 2020-03-28
- **Final completion:** 2021-12-28
- **Target enrollment:** 338 (ESTIMATED)
- **Last updated:** 2020-02-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04203043

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04203043, "The Prevstain Trial". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04203043. Licensed CC0.

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