Xyzal Claim To Match Zyrtec Efficacy At Half Dosage Dissolves In NAD Review

Claims that Sanofi's Xyzal 24 HR OTC product contains the same effectiveness as competitor Zyrtec but with half the medication fail a US National Advertising Division review. NAD also recommended modifying claims suggesting Xyzal's pharmacological design confers a clinically meaningful benefit over Zyrtec.