Zyrtec dosage babyI can only find limited info on this. . Sh is now 4 and taking the 6 year old dose and it's not . A children's Benadryl dosage chart can help you determine the right amount of antihistamine to give your baby. . . Do not use . As this eMedTV segment points out, however, mild symptoms may respond to a smaller dose. . Zyrtec with or without food, or as instructed by your baby's pediatrician. Physician reviewed Zyrtec Hives patient information - includes Zyrtec Hives description,... more