An anatomical structure enclosing an organ or body part: for example, capsules enclose the liver, kidneys, joints, and eye lenses. The term capsule is also used to describe a soluble, elongated shell, usually made of gelatine, containing a drug to be taken by mouth. The coating of some capsules prevents a drug that may have an irritant effect being released into the stomach, or allows a drug to be released slowly so it can be taken less frequently.
Capsule |
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