Oral capsules are a common form of medication designed to be swallowed whole. They consist of a gelatin shell that encases the active ingredients, allowing for controlled release in the digestive system. This method of delivery helps protect the ingredients from stomach acid and can improve absorption in the intestines. Capsules come in various sizes and can contain powders, granules, or liquids. They are often preferred for their ease of swallowing and the ability to mask unpleasant tastes. Many medications, including antibiotics and vitamins, are available in capsule form, making them a versatile option for patients.