Re: “Aren’t there any good side effects?”
Answer: Yes. Viagara was intended to be a heart medication.
(And as every parent knows, diphenydramine (Benedryl, etc.) is for colds; the fact that it knocks the kid out so he — and you — can rest is just a bonus.)
Benadryl knocks most kids out. Not all. Did the opposite to my oldest kid. YIKES!