What is the problem with phenylephrine? The ineffective oral decongestant under FDA scrutiny
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3 min read
In 2023, a U.S. Food and Drug Administration (FDA) advisory committee unanimously voted that oral phenylephrine is ineffective, finally clarifying the core of the public health debate around what is the problem with phenylephrine. For decades, this ingredient has been a staple in over-the-counter (OTC) cold and allergy medications, yet robust modern clinical data fails to prove its efficacy for nasal congestion. The issue centers on its poor absorption and metabolism when taken orally, rendering it essentially useless for its intended purpose.