Why You Shouldn't Give Tylenol After Vaccines: The Immune Response Explanation
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4 min read
According to a 2009 study published in *The Lancet*, infants who received prophylactic acetaminophen (Tylenol) had a reduced antibody response to several routine vaccines compared to those who received no medication. This crucial finding helps explain why you shouldn't give Tylenol after vaccines, especially preemptively, and underscores the importance of proper timing for fever-reducing medication.