Levocetirizine

There are two types of antihistamines. The drowsy and the non drowsy antihistamines. The drowsy antihistamines are Diphenhydramine, Promethazine, Chlorpheniramine. Wherelse the non drowsy antihistamines are Cetirizine, Fexofenadine and the rest. Most people prefer taking the non drowsy antihistamine as it does not disturb their everyday activities. You may choose the drowsy antihistamine if you are having difficulty sleeping or if the symptoms like coughing or itching disrupts your sleep. There isn't enough information available to say whether one antihistamine is better than another for treating allergies. Consult with your doctor or pharmacist for advice if you are unsure.