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.
Amygdalus Persica, Peach Bark, possesses slight sedative effects owing to a trace of hydrocyanic acid contained therein. The fresh infusion is of somewhat uncertain value in vomiting and "morning sickness." In small doses (ec. tr., I or 2 I.) it is of moderate efficiency in the gastric irritation of children, but usually disappoints when administered to adults. For adults the dose must be much larger, but it is very much open to question whether hydrocyanic acid in safe doses really possesses much sedative influence upon the walls of the stomach.