GERD Symptoms Linked to Breath-Alcohol Test Error

For drivers with acid reflux, coughing may potentially influence breath-alcohol results in Minnesota.

Updated on Oct. 2, 2026 in Asthma

Bold vector editorial illustration of a glass tube containing swirling vapor, representing a human airway, clean editorial illustration. — A forensic report in Minnesota is examining whether GERD-related throat clearing can cause inaccurate breath-alcohol test readings for drivers. AI Illustration. Upload story photo >

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A forensic report published May 4, 2026, documented two Minnesota drivers whose chronic acid reflux symptoms coincided with higher-than-expected breath-alcohol test results. The report investigates whether frequent throat clearing during a standard 20-minute observation period could affect accuracy.

Why it matters

Understanding how common digestive conditions like gastroesophageal reflux disease interact with testing technology is vital for both drivers and clinicians. About 20 percent of the U.S. population lives with GERD, raising questions about potential test contamination.

This forensic report examined two drivers in Minnesota who experienced 37 distinct coughing or throat-clearing events during observation. Findings contrast with a 1999 study of 10 people with severe GERD that suggested false breath-alcohol increases were highly improbable.

The players

Medico-Legal Journal

An academic publication focused on the intersection of medicine and legal standards.

The details

The report suggests that microaspiration may play a role, as small amounts of alcohol-containing gastric reflux can enter the airways during episodes of acid reflux. Persistent coughing and throat clearing can subsequently bring these stomach fluids toward the breath sample collector. This potential contamination mechanism challenges the assumption that the 20-minute standard observation period is always sufficient to clear the airway of localized reflux irritants.

1999: A study of 10 GERD patients regarding breath-alcohol tests was published.
2024: 11,904 alcohol-impaired driving crash deaths were reported in the U.S.
May 4, 2026: The forensic report on reflux and breath testing was published in the Medico-Legal Journal.

Health Landscape

This case series marks a departure from the 1999 study that previously dismissed the probability of false positives in this population. It updates the understanding of testing limitations in the context of common chronic digestive conditions.

If you manage chronic acid reflux, it is worth discussing the potential for airway irritation during routine medical or forensic testing with your primary physician. Be aware of how symptoms like persistent coughing or throat clearing might complicate standard assessment procedures.

The takeaway

While the relationship between GERD and breath-alcohol tests remains an area of active forensic investigation, recognizing symptoms of microaspiration is important. If you experience chronic cough or throat clearing, consult with your doctor to document these symptoms as part of your health history.