栀子为果实类药材。众多炮制规范书中只要求“除去杂质,筛去灰屑”,即可用于临床。但因其果皮韧性大,在无外力处理的情况下一般不易破损,故在煎煮过程中,因水无法或不彻底渗进果皮内,形成 Gardenia is a fruit medicine. Many processing specifications only require “removal of impurities, sieve ash removal,” and can be used clinically. However, due to its strong peel strength, it is generally not easy to break in the absence of external force treatment. Therefore, in the boiling process, water cannot penetrate or penetrate into the skin.