Abstract: Oral drug delivery is noninvasive, has a high rate of patient compliance, is easy to handle, and doesn't require any special sterile settings, it is the most popular method of administration. Nevertheless, a number of physical, biological, and pharmacological obstacles that certain medications must overcome in order to be absorbed into the systemic circulation reduce their therapeutic efficiency. The use of nanocarriers to deliver drugs orally has proven to be an effective solution to the aforementioned problems and is being explored as a potential replacement for oral medication administration. This chapter provides an overview of the latest developments in the use of nanocarriers for oral medication delivery in the treatment of different disorders. The chapter also describes how diverse nanocarrier designs and technologies improve therapeutic potential by overcoming physical, biological, and biochemical obstacles. it is easy to produce, has few sterility limitations, is less expensive, has flexible dosage form design, and has high patient compliance, oral drug delivery (ODD) is the most convenient and favored method of drug administration. However, low medication bioavailability—which is influenced by three crucial factors—is one of the difficulties associated with oral drug delivery. The other is solubility. Many mathematical models that predict the medication's rate of solubility and dissolution have been developed in order to achieve efficient drug absorption in vivo. Similarly, models that are noncellular and cellular determine permeability. Furthermore, the medication's behavior in the gastrointestinal tract (GIT) is influenced by physiological parameters, such as pH, microbial colonization, and enzymes, as well as intrinsic drug properties. A drug's dosage form is a method of getting it into a living organism. The medicine must be administered to the site of action at a rate and concentration that will maximize therapeutic benefit and minimize side effects in order to provide the intended result. Although the oral method is still commonly used, swallowing tablets and capsules can be a regular problem. As a result, numerous studies on cutting-edge drug delivery methods have been conducted. This review focuses on oral dispersible tablets, a novel approach to drug delivery systems that are currently more focused on formulation and set a new course that not only helped patients increase their level of therapy compliance.
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