Holonyms (order Anura is a member of...): amphibia; class Amphibia (the class of vertebrates that live on land but breed in water; frogs; toads; newts; salamanders; caecilians).olonyms (order Anura is a member of...): amphibia; class Amphibia (the class of vertebrates that live on land but breed in water; frogs; toads; newts; salamanders; caecilians).
Cetirizine is not a narcotic. It's belongs to a class of drugs call 2nd generation antihistamines. It's usually used to treat Allergic Rhinitis and Hives. 2 people found this useful.
Chemically, levocetirizine is the active enantiomer of cetirizine. It is the R-enantiomer of the cetirizine racemate. Levocetirizine is an inverse agonist that decreases activity at histamine H1 receptors.This in turn prevents the release of other allergy chemicals and increased blood supply to the area, and provides relief from the typical symptoms of hay fever.It does not prevent the actual release of histamine from mast cells.ike many new drugs it entered the market at a higher price than currently available third and second generation antihistamines. In India, one form of the drug is available as Crohist MK tablets and syrup, a formulation of levocetirizine hydrochloride and montelukast.