This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
In chronic syphilitic cutaneous eruption, such as rupia or psoriasis, this acid has been rightly commended. In ordinary, non-specific disorder, it is indicated whenever general debility is a marked symptom, and especially when nerve-power is impaired. Dr. Tilbury Fox frequently gave it, in conjunction with a bitter tonic, for psoriasis in weakly subjects.