1 In dogs, cetirizine is used primarily to treat allergic symptoms and itchy skin e.g from allergic dermatitis and atopy in dogs.  In cats, cetirizine is used to treat non-responsive chronic inflammation of the nose and sinuses (rhinosinusitis). It is also used to treat pruritus (itching) in cats.
Mother of pearl, also called nacre, is an iridescent layer of material that forms the shell lining of many mollusks. Pearl oysters and abalone are both sources of this substance, which is widely used as an inlay in jewelry, furniture, and musical instruments.
Definition of pearl. 1a : a dense variously colored and usually lustrous concretion formed of concentric layers of mother-of-pearl as an abnormal growth within the shell of some mollusks and used as a gemb : mother-of-pearl. 2 : one that is very choice or precious. 3 : something resembling a pearl intrinsically or physically.