Claritin (loratadine) is an antihistamine that reduces the effect of the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Claritin is used to treat the symptoms of seasonal allergies, such as sneezing, watery eyes, and runny nose and itching of the nose and throat. Claritin is also used to treat skin hives and itching in people with chronic skin reactions.
Get emergency medical help if you have any of these signs of an allergic reaction to Claritin: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have a serious side effect such as:
- fast or uneven heart rate;
- feeling like you might pass out;
- jaundice (yellowing of your skin or eyes); or
- seizures (convulsions).
Less serious Claritin side effects may include:
- feeling tired or drowsy;
- stomach pain, diarrhea;
- dry mouth, sore throat hoarseness;
- eye redness, blurred vision;
- nosebleed; or
- skin rash.