Cetirizine is an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes /nose, sneezing, hives, and itching. It works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction.
Gas-Producing Foods: Milk and Dairy Products. Milk and other dairy products contain a sugar called lactose, which can be difficult for your digestive tract to process if your body doesnât have enough of the enzyme lactase. Cheese, ice cream, and milk all contain lactose, and may cause excessive gas in people.
(See below.) The sugar fructose, a commonly used sweetener, like lactose and sorbitol, also may cause abdominal bloating/distention and flatulence. However, the problem that can occur with fructose is different from that with lactose or sorbitol.