Can you give a year old child Benadryl hours after giving her Zyrtec without it causing an overdose?
There are different kinds of zyrtec, which can confuse matters. However Zyrtec does have a 'moderate' interaction with Benadryl, and you should check with your doctor or pharmacist about giving such a small child these two drugs in close proximity. Good luck!
Medication Overload: Watch for Drug Interactions
Zyrtec Oral Medication Interactions
Children's Zyrtec Allergy Oral Medication Interactions