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Patient Education

Pinnacle Research

Gastroenterology Consultants of San Antonio has partnered with Pinnacle Clinical Research to conduct late stage clinical trials for the following conditions:

  • Nonalcoholic fatty liver disease (NAFLD)
  • Nonalcoholic steatohepatitis (NASH) (seeking participants)
  • Hepatitis B
  • Hepatitis C (seeking participants)
  • Primary biliary cholangitis (PBC) (seeking participants)
  • Primary sclerosing cholangitis (PSC)
  • Portal hypertension
  • Ulcerative colitis (seeking participants)
  • Crohn’s disease (seeking participants)
  • Irritable bowel syndrome (seeking participants)
  • Gastroparesis (seeking participants)
  • Bowel preparation
  • Other hepatic and GI diseases and conditions

If you’re interested in a study that’s seeking participants, please contact our research team for more information. Call 210-982-0320 or visit

Focused on developing effective nonalcoholic fatty liver treatments to help fight this widespread disease.

NAFLD and its later-stage form, called NASH, have become an epidemic in the United States. Over 80 million Americans suffer from NAFLD, and it’s one of the leading reasons for liver failure and transplant. While Pinnacle Clinical Research conducts clinical trials in a many areas, we’re especially dedicated to testing the next generation of treatments for nonalcoholic liver disease. Learn more about fatty liver.

Led by medical director and world-renowned liver expert, Dr. Stephen Harrison, and five board-certified investigative physicians.

Pinnacle’s team of clinical research coordinators and research assistants perform daily monitoring of clinical trials, and everyone involved has extensive experience with each clinical trial phase. Our quality control and regulatory team work with sponsors to ensure data collection and documentation is performed according to good clinical practices, FDA regulations and our own sky-high standards.

Meet the leadership of Pinnacle Clinical Research

Stephen A. Harrison, MD

Gastroenterologist/Hepatologist and Medical Director

Dr. Harrison brings extensive liver research and treatment experience to Pinnacle’s investigative staff. As a decorated professor of medicine and former military officer, he has instructed thousands of medical students in gastroenterology and helped advance the world’s understanding of liver diseases. Now he’s turned his attention to leading the efforts of Pinnacle Clinical Research.

For more information on how Gastroenterology Consultants of San Antonio partners with Pinnacle Clinical Research to improve America’s gastrointestinal health, call 210.614.1234 today.

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