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.
Excess gas may be a symptom of a more serious chronic condition. Examples include diverticulitis or an inflammatory bowel disease, such as ulcerative colitis or Crohn's disease. Excess gas and bloating may also be a symptom of bacterial overgrowth in the small intestine from conditions such as diabetes. Food intolerances. If your gas and bloating occur mainly after eating dairy products, it may be because your body isn't able to break down the sugar (lactose) in dairy foods.