ARBs May Lead to Worse Outcomes in Celiac Disease

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PHILADELPHIA — Patients with celiac disease who take an angiotensin receptor blocker (ARB) may experience worse outcomes, such as increased risk of iron deficiency, diarrhea, and abdominal pain, according to a study presented at the American College of Gastroenterology (ACG) 2024 Annual Scientific Meeting.

The association may be related to the similar pathophysiology between ARB-associated enteropathy and celiac disease, though additional research is needed.

“Based on our findings, people should take caution when prescribing angiotensin receptor blockers to people with celiac disease,” said lead author Isabel Hujoel, MD, clinical assistant professor of gastroenterology and clinic director of the Celiac Disease Center at the University of Washington, Seattle.

“When we see someone with nonresponsive celiac disease, meaning persistent symptoms despite a gluten-free diet, I do think we should review their medication list, and if they’re on an ARB, we should consider a trial off those medications to see if they respond,” she said. “A primary care provider may choose other hypertensives as well.”

Hujoel and co-author Margaux Hujoel, PhD, a postdoctoral research fellow at Brigham and Women’s Hospital, Boston; Broad Institute, Cambridge; and Harvard Medical School, Boston, analyzed data from the National Institutes of Health’s All of Us, a large publicly available US longitudinal dataset.

The researchers conducted a survival analysis of time-to-first event after celiac disease diagnosis, allowing patients to have a time-dependent covariate of ARB use. They looked at outcomes such as iron deficiency, diarrhea, abdominal pain, vitamin deficiency, vitamin D deficiency, malabsorption, low hemoglobin, and weight loss.

The analysis included 1849 patients with celiac disease, including 1460 women and 389 men, with a median age of nearly 50 years at diagnosis. While the vast majority of patients (nearly 1600) didn’t take an ARB, 120 started one before celiac disease diagnosis and 142 started one after diagnosis.

Overall, taking an ARB was associated with increased hazard ratios [HRs] for low hemoglobin, iron deficiency, diarrhea, and abdominal pain. There weren’t increased risks for weight loss, malabsorption, or vitamin deficiencies.

When excluding those who had an ARB prescription before diagnosis, the HRs remained significantly higher for low hemoglobin (HR, 1.98) and iron deficiency (HR, 1.72) for those who started an ARB after diagnosis.

“The use of angiotensin receptor blockers may be associated with worse outcomes in the setting of celiac disease, specifically persistent symptoms and possibly poor small bowel healing as evidenced by malabsorption,” Hujoel said.

Future studies could look specifically at losartan, which was the most common ARB prescribed in this analysis, she said. Other studies could also analyze different patient outcomes, whether patients were on a gluten-free diet, medication adherence, and recurrence or persistence of symptoms rather than initial occurrence. The associations between ARB use and celiac disease could shift among patients who are in remission, for instance.

“ARBs are some of the most widely used medications, so studies like these can help people to understand that they may have symptoms but not know it’s related to their medication. Public awareness of this fact is key,” said Patricia Jones, MD, a hepatologist and associate professor of clinical medicine at the University of Miami Miller School of Medicine, Miami. Jones co-moderated the plenary session on small intestine, functional, and liver research.

“There are many types of antihypertensives, so while ARBs are used often, other options are available if people have symptoms, especially if they have worsening symptoms with celiac disease,” she said. “It’s important to make changes in your practice.”

The study was named an ACG Newsworthy Abstract. Isabel Hujoel and Patricia Jones reported no relevant disclosures.

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