I listened to a naturopathic doctor for an hour today... she spoke about the need for the enzyme phenylalanine! I can't believe all it can upset if it isn't present in the body in enough quantity.
One thing that caught my ear is that it can improve the symptoms of ADD/ADHD! (It also helps a person feel love and love others

)
There's many things it helps with, so check it out if you wish.
As for sleep, I use valerian, and passion flower (in much bigger quantities than the blends of 60 mg etc ) Be sure to check with your pharmacist or someone who can evaluate the meds you are on and herbals use.