Zyrtec (cetirizine hydrochloride) is an antihistamine that treats symptoms, such as itching, runny nose, watery eyes, and sneezing from hay fever (allergic rhinitis) and other allergies, such as allergies to molds and dust mites. Antihistamines; PA Criteria: Tier 1 products are covered with no authorization necessary for members under age 21. For members 21 years and older, Tier 1 products are available with prior authorization. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Teicheira on can you take cold medicine with flonase: Cold medicines, encompass a large variety of over-the-counter medications. Generally cold medicines are combination of multiple ingredients meant to relieve the side effects of the common cold. Unfortunately, it. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Sinha on can you take allegra and mucinex together: Mcinex liquefies mucous , should not be taken with lot of medicines, zyrtec (cetirizine) would dry up mucous, so donot take togather. We studied 4,871 people who take Flonase and Zyrtec from FDA. Drug interactions are found. See what they are, when they happen and for whom. Flonase (fluticasone) is a synthetic steroid of the glucocorticoid family of drugs and is prescribed for the control of symptoms of allergic and non-allergic rhinitis. Comprehensive disease interaction information for Zyrtec. Includes Cetirizine - alcohol. Comprehensive alcohol & food interactions for Zyrtec (cetirizine). Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. WebMD explains how to manage your hay fever with drugs, nasal sprays, allergy shots, and more.