Drug delivery can be described as the procedure of administering pharmaceutical substances to treat human beings as well as animals. The technology documents the process of administering medicine. These are typically patent-protected. The most common methods by the administration of medications are nasal, peroral rectal, ocular inhalation, and sublingual routes. 

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Certain medicines are not given through these routes since they aren't taken into circulation systemically and can result in an enzyme breakdown. Drug delivery systems must be secure and not allow the contamination of the drug by contaminants in the environment.  

Modern technology has created closed system transfer devices that are capable of managing medicines in their preparation, administration, mixing, storage, and transfer. These systems for drug delivery were developed to meet the requirement for a smooth, safe, and effective transfer system. They're a reliable method of stopping the spread of contamination through harmful chemicals. 

They block the external elements, which could be harmful to sterile formulations from entering the system. They also function as a safeguard against the removal of vapors, aerosols, and liquids from the system. The contamination of surfaces and vials, syringes and syringes leakages, and spills of medicine is controlled and could result in health risks.