Capsule refers to the drug (or with excipients) filled in a hollow hard capsule or sealed in a soft capsule material in the solid preparation, can be divided into hard capsules and soft capsules. Among them, the pharmaceutical hollow capsule is an important auxiliary material for hard capsules, which is a hard and flexible cylindrical capsule composed of two sections of the cap and body that can be fitted and locked. Soft capsule due to its soft capsule shell elasticity, can also be called elastic capsule agent or gelatin pill agent.
Capsules can effectively mask the bad odor of the drug, improve drug stability, so that the liquid drug solid dosage form, can also be made into a slow and controlled release of the capsule material or capsule shell coating, positioning or time release capsules.
