Adverse events occurring in greater than or equal to 2% of loratadine; pseudoephedrine sulfate 24 hour extended release tablets-treated patients, but that were more common in the placebo-treated group, include headache. Loratadine is used to temporarily relieve the symptoms of hay fever (allergy to pollen, dust, or other substances in the air) and other allergies. Loratadine comes in capsules, tablets, and as syrup. Loratadine should not be given to children under that age 6. You should not take more than 10 milligram (mg), which is one tablet or capsule. Original review: Jan. 6, 2019. My husband and I both tried to stop taking Claritin and found that after a few days, we both have UNBEARABLE itching all over our body, especially our scalp and face. Pictures of Claritin (Loratadine), drug imprint information, side effects for the patient. Claritin (loratadine) is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. What is Claritin? Loratadine—also known by its brand name, Claritin—belongs to a group of medications known as antihistamines. It reduces the effect of a natural chemical in the body called histamine; this chemical can cause an array of symptoms like runny nose, itchy eyes, sneezing, rashes and more. Cetirizine is an allergy medication that you can buy over-the-counter at a pharmacy. That is, you don’t need a prescription. The medication comes in capsules, tablets, and a syrup. Before taking Claritin-D, you should tell your doctor or pharmacist about all prescription, non-prescription, illegal, recreational, herbal, nutritional, or dietary drugs you're taking, especially: Among the most popular over-the-counter (OTC) allergy meds are Zyrtec and Claritin. These two allergy drugs produce very similar results. They both calm your immune system’s reaction to allergens.