Hydroxychloroquine cut the death rate significantly in sick patients hospitalized with COVID-19, without heart-related side-effects, according to a new study published by Henry Ford Health System.

The large study involved 25-hundred patients and found 13% of those treated with hydroxychloroquine alone died compared with 26.4% not treated with hydroxychloroquine. The study was published in the peer-reviewed International Journal of Infectious Diseases.

“The findings have been highly analyzed and peer-reviewed,” said Dr. Marcus Zervos, division head of Infectious Disease for Henry Ford Health System, who co-authored the study with Henry Ford epidemiologist Samia Arshad. “We attribute our findings that differ from other studies to early treatment, and part of a combination of interventions that were done in supportive care of patients, including careful cardiac monitoring. Our dosing also differed from other studies not showing a benefit of the drug. And other studies are either not peer reviewed, have limited numbers of patients, different patient populations or other differences from our patients.”

Zervos said the potential for a surge in the fall or sooner, and infections continuing worldwide, show an urgency to identifying inexpensive and effective therapies and preventions.

“We’re glad to add to the scientific knowledge base on the role and how best to use therapies as we work around the world to provide insight,” he said. “Considered in the context of current studies on the use of hydroxychloroquine for COVID-19, our results suggest that the drug may have an important role to play in reducing COVID-19 mortality.”

The study also found those treated with azithromycin alone or a combination of hydroxychloroquine and azithromycin also fared slightly better than those not treated with the drugs, according to the Henry Ford data. The analysis found 22.4% of those treated only with azithromycin died, and 20.1% treated with a combination of azithromycin and hydroxychloroquine died, compared to 26.4% of patients dying who were not treated with either medication.

“Our analysis shows that using hydroxychloroquine helped saves lives,” said neurosurgeon Dr. Steven Kalkanis, CEO, Henry Ford Medical Group and Senior Vice President and Chief Academic Officer of Henry Ford Health System. “As doctors and scientists, we look to the data for insight. And the data here is clear that there was benefit to using the drug as a treatment for sick, hospitalized patients.”