In ancient times, the term "ji" referred to the form in which medicines were prepared, now known as dosage forms. There are various types of "ji," such as decoctions, wines, pills, powders, ointments, elixirs, lozenges, tablets, extracts, frosts, gels, teas, and ferments (the nature of drugs and prescriptions is divided into ten kinds of formula, twelve "ji," etc., which is another meaning. A single dose of medicine, or one prescription, was referred to by the ancients as one "ji" of medicine).