胶囊剂以可溶性明胶作为包覆材料的囊状药剂，可避免口服时，药物与味觉器官直接接触引发恶心反应。

In the manufacture of pharmaceuticals, encapsulation refers to a range of dosage forms—techniques used to enclose medicines—in a relatively stable shell known as a capsule, allowing them to, for example, be taken orally or be used as suppositories. The two main types of capsules are: