The walnut remedy has more than one use. It is the remedy that helps when a change it taking place in your life. For instance, changing jobs, moving house, getting divorced, etc. It also is the remedy that helps when you're being influenced by others. It will help those who are unable to resist the dominance of someone else when making decisions.
I've also noted this remedy can help protect against psychic influences, and bad dreams.
For Empaths:
For the empath, it is also useful when someone is using their influence on you in order to get what they want. This type of thing is common in those who wish to break up in a relationship gone bad, but cannot seem to bring themselves to do it. Also it is useful when you feel someone is psychically attacking you.
I've found that using Walnut and the Bach Flower Remedy, Aspen, is a good combination for those who have disturbed sleep, such as nightmares or the sense that they are being attacked on an astral level.