Rootman,
I agree that medication is a personal choice. But you have two professionals saying that maybe it is a good idea ....one is your dad ...maybe it would not hurt to try. Just my opinion.
I would ask Dr. or your dad about the Herbal teas. Just to be safe. A little paranoia goes a long way for us here.
I will see if I can find you the sleep archives if somebody does not beat me to it.
Take care.