i have a 4 year old weighing around 41 pounds, He has seasonal allergies and cannot sleep because he feels bad. is it safe to give him the correct dosage(i know what they are) of children's tylenol for his aches and children's benadryl for the allergies together?
The children's benedryl should take care of the aches, so the tylenol would be completely unnecessary. Benedryl takes care of the itchies, the sneezies, and the sinus pressure and aches that come with it.
Nothing adverse (afaik) Tylenol PM is Tylenol and Benadryl together. Here's a great read about allergies http://www.thedoctorwithin.com/allergies/Allergies-The-Threshold-of-Reactivity/