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.
Phenol, Carbolic Acid. Antiseptic, antipyretic, and caustic. Used internally in doses of 1-6 to 0 gr. in pill or emulsion, in fermentative dyspepsia, and obstinate vomiting. Locally, full strength as caustic, and I part to 500 to I in 1000 as a wash or injection. In ointments, usually 5%. This agent is being largely displaced by other antiseptics, but should not be forgotten as a safe caustic possessing local anesthetic properties.