My 5 year old son has been taking one teaspoon of Zyrtec a day fo...

My 5 year old son has been taking one teaspoon of Zyrtec a day for approximately 6 weeks. After not getting much relief, the pediatrician increased his dose to 1 1/2 teaspoons. Ten days later, my son started experiencing horrible tics, clearing of the throat and constant sniffing. This head jerking and shoulder raising was never an issue until the Zyrtec was increased. We have since discontinued the Zyrtec. We are waiting two weeks as suggested by our pediatrician and hope that the tics will stop