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 some forms of obstinate vomiting, dependent upon disordered stomach, with hepatic congestion, 3 to 5 gr. of calomel in pill or powder, have a most beneficial effect. The dose should be followed after a few hours by a saline purge.