Claritin-D (loratadine / pseudoephedrine) is an over-the-counter medication that's used to relieve allergies and congestion. It's available as a 24-hour tablet that's taken once per day and a 12-hour tablet that's taken twice per day. What is Claritin-D 12 Hour? Claritin-D 12 Hour is a combination medicine used to treat sneezing, runny or stuffy nose, sinus pain, itchy or watery eyes or nose, and other symptoms of allergies and the common cold. Find drug information for Claritin-d 12 Hour on CVS.com, including related drug classes, side effects, dosage, and answers to frequently asked questions. Claritin-D 12 provides powerful non drowsy symptom allergy relief. The steroid free allergy medicine is available in 12 hour and 24 hour doses, for adults and children 12 years and over. CLARITIN-D 12 HOUR- loratadine and pseudoephedrine sulfate tablet, extended release Bayer HealthCare LLC. temporarily relieves these symptoms due to hay fever or other upper respiratory allergies: sneezing - itchy, watery eyes - runny nose - itching of the nose or throat - temporarily. Claritin-D® Tablets 12 Hour One dose relieves common allergy symptoms such as sneezing, runny nose, itchy, watery eyes and itchy nose and throat, plus sinus congestion & pressure, and nasal congestion all day. Claritin-D is used to treat sneezing, runny nose, itchy eyes, hives, itching, and other symptoms of allergies and the common cold. Learn about side effects, interactions and indications. Get up to 12 hours of fast, non-drowsy relief from sinus congestion & pressure, nasal congestion, runny nose, itchy, watery eyes using Claritin-D® tablets. With a non-drowsy formula containing loratadine and pseudoephedrine, Claritin-D 12 Hour offers dual-action relief from symptoms caused by indoor and outdoor allergens. Contains the powerful antihistamine loratadine and nasal decongestant to relieve nasal congestion and improve breathing.