This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Nickel Bromide. Nerve sedative and hypnotic in doses of 2 to 8 gr. Metallic nickel in 2x and 3x trituration is asserted to be of benefit in periodic nervous sick headaches, usually associated with asthenopia and weak digestion.