Xyzal is a prescription antihistamine medication containing 5 mg of levocetirizine dihydrochloride per tablet. This package contains 30 film-coated tablets manufactured by GSK for treating allergy symptoms. Each film-coated tablet contains 5 mg of levocetirizine dihydrochloride as the active ingredient. This medication requires a prescription and should only be taken under the direction of a healthcare provider. The tablets come in a blister pack containing 30 doses.