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.
Worst: Dairy. If you feel gassy after a few slices of cheese or a bowl of cereal with milk, you may be lactose intolerant, which means your body lacks the necessary enzymes to break down lactose (the sugar found in dairy products). That can cause gas to form in the GI tract, which may trigger bloating.