Does DayQuil Actually Work? A Critical Look at the Cold and Flu Remedy
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4 min read
In 2023, an FDA advisory panel unanimously concluded that oral phenylephrine, a decongestant found in DayQuil and other popular cold remedies, is not effective at clearing nasal congestion. This ruling sparked public confusion, leading many to question: does DayQuil actually work?. The answer lies in understanding what each ingredient does—and doesn't do—for your symptoms.
