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.
In general, a healthy breakfast contains protein, fruits, whole grains, or vegetables, says Ruth Frechman, MA, RDN, CPT, nutritionist and author of The Food is My Friend Diet.. Typically, you want to include foods from at least three of these groups, says Frechman.
If running on empty doesn't feel good to you, you will want to hydrate with water and eat something light that digests easily. A good pre-run breakfast for those who run three to six miles can be something as simple as a banana, water and maybe a cup of coffee an hour or so before starting your workout. You could also eat toast with jam or half of a carbohydrate bar, if that works for you.