http://www.medications.com/effect/view/26998 my then 2 year old daughter began to take Zyrtec in sept 06 for allergies. she began to STUTTER in November 06. she has gotten worse over time. she also has experienced vaginal irritation for about the same amount of time ( 1 1/2 years) i have had her tes Sun, 07 Sep 2008 15:08:03 -0400 http://www.medications.com/effect/view/26998?item=12107 My 3 year old son has taken Zyrtec as needed for seasonal allegies. This summer his allegies seemed to be pretty bad so he was taking it for about 2 months straight. One day i noticed that he stuttered and then it kept getting worse and worse. He had neve http://www.medications.com/effect/view/26998?item=12107