Hidden ingredient in your pills may change how drugs work
NCT ID NCT04534153
First seen Nov 18, 2025 · Last updated May 23, 2026 · Updated 26 times
Summary
This study looked at whether sodium lauryl sulfate (SLS), a common additive in many medications, changes how the body absorbs the allergy drug fexofenadine. Twelve healthy adults took fexofenadine alone or with low or high amounts of SLS. Researchers measured drug levels in the blood and stool to see if SLS affects absorption. The goal is to understand how inactive ingredients can impact drug effectiveness.
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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Locations
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Ucsf Ctsi Crc
San Francisco, California, 94143, United States
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