This reaction is partly caused by the release of histamine from certain cells in the body. Xyzal is an antihistamine, which means it blocks histamine from binding to histamine receptors and causing allergy symptoms. Because histamine is responsible for many of the symptoms of allergies, blocking it can be helpful.
The Chianina is both the tallest and the heaviest breed of cattle. Mature bulls stand up to 1.8 m (5 ft 11 in), and castrated oxen may reach 2 m (6 ft 7 in). It is not unusual for bulls to exceed 1,600 kg (3,500 lb) in weight. Males standing over 1.51 m (4 ft 11 in) at 12 months are considered top-grade.
The 10 Biggest Dog Breeds. 1  Tibetan Mastiff: This handsome dog is known for the lionlike mane around his head. He was bred to guard temples. 2  Caucasian Ovcharka: This breed averages 190 pounds, though itâs not uncommon to see one close to 250 pounds.