Well, I'll put on my flame suit - all of my kids went through phases of waking at night (3 slept through the night on their own by 3 months, 2 needed to be Ferberized at 6 months). Benadryl, 2 night in a row, always broke the waking cycle. I believe that good, solid sleep, is even more important than good nutrition, something children really need. BTW, I don't give tylenol unless the fever is at least 101, and the child is fussy, and do not have any cold/cough medication in the house, since it has been shown that it's not effective for children.
My kids went to bed at 8 (5 and 7 year olds still do), and up until the age of 3/4, had a nap from 1 - 3, and under 18 months old, 9 - 11, 2 - 4. I am now blessed with kids who sleep great!