Using Xyzal with other drugs that make you drowsy can worsen this effect. Ask your doctor before using opioid medication, a sleeping pill, a muscle relaxer, or medicine foranxietyorseizures. Tell your doctor about all your other medicines, especially: ...
Studies have been performed with the racemic cetirizine [see Drug Interactions (7)]. Pediatric patients Data from a pediatric pharmacokinetic study with oral administration of a single dose of 5 mg levocetirizine in 14 children age 6 to 11 years with body weight ranging between 20 and 40 kg ...