Can kids take Tylenol and Zyrtec together?

Yes...but be sure you have the correct dose according to their weight from your doctor.

I was just at the doctor today and he told me to give my one year old daughter (20.4 LBS) Tylenol as needed every 4-6hrs at a dose of 0.8ml and 24hr Zyrtec before bed for the next 5 days at a dose of 2ml/2cc aka 1/2 tsp.

I am also a nurse at a Children's hospital. It is safe as long as you are giving a dose based on the child's weight...not the child's age.