cetrizine for possible allergic reaction?

[AmandaKay]

My ittle just woke up with a slightly puffy face and itching pretty badly, both of which are abnormal for her.
I am not sure, but I am thinking she ate or got into something that she is having an allergic reaction to. I do not have any childrens benedryl on hand, but do have children's cetrizine. Can this be use instead of benedryl, or no? If so, doseage and tips to administer would be greatly appreciated! Thank you in advance.

[Charley Chuckles]