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. Free answers from top Doctors in the palm of your hand: Worried about negative side effects? Dr. Hegab tells you if you can take Mucinex with an antihistamine, such as Benadryl. Such as Vitamin A is inhibited by zinc, vitamin D, and vitamin E. Maybe you are getting too much of something and can choose the right supplement that may help. hope this is helpful. What about the new formulation of sudafed that substitutes loratadine for pseudoephedrine ? Does this conflict with Mucinex DM ? How long does it take for loratadine to take effect? Posted 25 Apr 2012 • 1 answer. I just took my 2nd pill, 24 hours after the first. Still have very itchy eyes, runny nose, bad cough, headache, etc. Symptoms Treated Runny Nose Sneezing Itchy/Watery/Red Eyes Itching of Nose/Throat Active Ingredient Loratadine 10 mg (antihistamine) Review Just one Alavert tablet relieves allergy symptoms for a. Explains the medication fexofenadine (Allegra, Allegra Allergy, Children's Allegra, Allergy 24-HR, Mucinex Allergy), a drug used for the temporary relief of runny nose, sneezing, and nasal stuffiness from the common cold. Also Zyrtec allergy pills everyday and Singulair. My insurance will not pay for Singulair at all. Rinsing my sinuses with saline and taking Mucinex. I take a lo. F.A.Q.s. Who can fill prescriptions at the Belmont Campus Pharmacy? Students, faculty, and staff are eligible to fill prescriptions at the pharmacy, as are spouses and dependents of faculty and staff. Consumer information about the drug loratadine (Claritin, Claritin RediTabs, Alavert, Claritin Hives Relief, Children's Claritin, and others) used for the relief seasonal allergic rhinitis symptoms and hives. Article includes descriptions, uses, drug interactions, and side effects.