I'm on the NO boat for both.
I have and will never take benadryl myself and would NEVER give it to my children just to make some part of my life easier. They would only ever get it if the Pedi said it would be the only thing that would help(whatever the issue may be).
Also, I won't be giving my child rice cereal until 6 months. There is no need for it, unless for reflux or other medical issues.
Another thing I also disagree with that is along the same lines is being induced(medically) because you are uncomfortable or don't want to give birth to a big baby. Why put yourself through it? Just let that baby come out on his/her own...if not, then see what the deal is.
(Sorry, unexpected rant there at the end).