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.
As a defense mechanism, the particle is then coated with layers of nacre, a blend of minerals secreted by the oysters or other mollusks. These layers eventually become a thick enough coating to form a pearl. Mother-of-pearl is the name commonly given to shells coated in a deposit of nacre.