Urticaria
"As someone who uses Zyrtec as one of 2 primary treatments (The other being Benadryl.) I can vouch that Zyrtec gets the job done as described. 24 hours of itch free and low-drowsiness is very suitable for me. If you are someone having withdrawals from Zyrtec then you don&#039;t take it right. It only occurs when your body needs the Zyrtec in order for your brain to be chemically balanced. This usually occurs if you take it based on a schedule rather then when you notice your real symptoms. 
If you listen to your doctor and/or the label, then you will be like me as someone who is happy to be symptom free."