Drugs in capsules are generally irritating to the esophagus and gastric mucosa, or have a bad taste, are easily volatile, are easily decomposed by saliva in the mouth, or are easily inhaled into the trachea. These medicinal capsules not only protect the medicinal properties from being destroyed, but also protect the digestive organs and respiratory tract from irritation. Removing the capsule shell may result in drug loss, drug waste, and reduced efficacy. In addition, some drugs need to be dissolved and absorbed in the intestine, and the capsule is a kind of protection to protect the drug from being destroyed by stomach acid.