Gave my 7 yr old 10 mg zyrtec (cetirizine) on accident will she be okay?

Yes: You don't need to do anything. That dose is non toxic. The national poison control number is 800-222-1222. The call is free and the advice is good for any accidental ingestion. Someone is there 24/7.

Yes: 10mg should cause no problems, in fact that is an appropriate dose for children greater than 6 years old, but do not exceed 10mg in a day.