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.
Peppermint, Mentha Piperta. The warm infusion is diaphoretic, while the oil is antiseptic and anesthetic, and may be given in 2 to 5 I. doses in fermenting stomach. Add the oil to a small quantity of glycerine, then incorporate with a quantity of hot water and administer. Locally, the oil serves somewhat the same purposes as the solutions in oil of the more active menthol, which is to be preferred. The oil is a good application to aching carious teeth, but a better plan is to first apply "Echafolta" and follow with equal parts plantago (q. v.) and oil of peppermint.