Claritin is generally very safe but can cause the side effects you mentioned. Try another antihistamine
Jarret Patton MD FAAP
Possible that her allergies getting worse
Some children seem to have this effect with allergy medications.
It is not permanent and should get better within 24 hours of stopping it.
You may try a different allergy med such as zyrtec, singulair or other over the counter. I would stay away from benadryl for these symptoms though.
Alvaro G. Reymunde, MD
Pediatric Associates of Kingston