Zyrtec and withdrawals

I was prescribed Zyrtec a few years ago for allergies. I also have MPV and need to take Atenolol, I will need to take Atenolol for the rest of my life. My cardiologist recommended I stop taking Zyrtec because it can give you an irregular heart beat. When I tried to stop it I got very bad withdrawal symptoms, chills,heart racing, insomnia, itchy skin. I thought I was going crazy, so I took one Zyrtec as soon as I took it 15 min later the symptoms stopped. The next night I decided to try and cut the pill in half and only take 5 mg, that was ok for 3 day's then the symptoms returned. I had to take the other half of the Zyrtec and then the symptoms went away.
I can not believe that I have to find a way to wean off Zyrtec. I am very annoyed that they do not list on the label that their could be withdrawal symptoms after taking Zyrtec for a while. I am not giving up I am going to continue and try to wean myself off the Zyrtec, hopefully I won't have a heart attack in my attempt to get off this drug. If anyone has a successful way to wean off Zyrtec please post it. Thanks and I hope this helped someone who was thinking of taking this drug. STAY AWAY FROM IT..

I started using Zyrtec recently after my niece received it from her doctor as the solution to her allergies. (We bought it at the drug store). My allergies are skin related where i walk and feel a deep itch in my thighs and anywhere else i have tight clothing. Also when i work out - i have itch deep skin. This is under the surface and very uncomfortable especially when you are walking/working out. Leads to confusion etc. I had never used any allergy medicine before but decided just to see if i would feel any different.

Anyhow, I started using Zyrtec the other day and almost immediately, I started fighting with my boyfriend - everything i was angry with him about came out. It was helpful but also i was very mean in my approach. I also started getting back pains around the spine area - not in the spine but around it and could not sleep until i took an ibuprofen. Today i experienced left shoulder and back pain. That was it for me and whats funny is that i took the lowest possible doze. So i am not touching that medicine again. I am a 36 year old woman. Its a strong medicine and something is strange with it (changes moods etc). I will have to change the medication for my niece before she goes through the side effects.