These are made of liquorice, gum-arabic, sugar, oil of anise, and a little opium. They are very quieting to a cough, but, as opium tends to check expectoration, they are not suitable for the early, tight stage ; their time is when cough is loosened thoroughly, but is annoying and interferes with sleep at night. From one to four lozenges may be dissolved slowly in the mouth in the course of a night if required.
Many more drugs might be here named, and their properties and uses described. But I think it best to confine our attention to those best tried and known to the medical profession. Others may be read about in I medical works.