# Cerebrovascular Reactivity in American Football Players

> **NCT03417492** · PHASE1 · TERMINATED · sponsor: **University of Pennsylvania** · enrollment: 7 (actual)

## Conditions studied

- Traumatic Brain Injury
- Mild Traumatic Brain Injury
- Post-Concussion Syndrome

## Interventions

- **DRUG:** Sildenafil Citrate

## Key facts

- **NCT ID:** NCT03417492
- **Lead sponsor:** University of Pennsylvania
- **Sponsor class:** OTHER
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2018-03-01
- **Primary completion:** 2022-06-30
- **Final completion:** 2022-06-30
- **Target enrollment:** 7 (ACTUAL)
- **Why stopped:** Difficulty enrolling participants due to COVID emergency, and planned start of new study to address this question in a more rigorous fashion.
- **Last updated:** 2022-09-21

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03417492

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03417492, "Cerebrovascular Reactivity in American Football Players". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT03417492. Licensed CC0.

---

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