Capsules are primarily used by manufacturers if the intended drug cannot be consumed in its entire form. They are also handy when the medication has to be combined with other liquids or oil to aid easy absorption into the human body. The majority of capsules are comprised of inert substances that cannot interact with one another and will not cause adverse reactions. However, it is important for consumers to understand how capsules are designed and how they differ from tablets. Understanding capsule structure and function can help healthcare practitioners prescribe and deliver capsules to patients in a way that provides the maximum benefit to the patient.