What are some natural herbs or remedies that can help with paranoia?

Wouldn't recommend. Paranoia can be a very painful and disabling condition -- and is one that needs help from a compassionate psychiatrist and/or therapist. Although I am both a board certified psychiatrist and a classical homeopath, i would not recommend using herbs or remedies alone to deal with this condition. Please see a psychiatrist about this, so that you can receive understanding and help.