Adherence to (or compliance with) a medication schedule refers to the extent to which individuals take drugs as advised by their medical professionals. Many medical practitioners prefer the term "adherence" over "compliance," as the latter suggests that the patient is merely following orders from their doctor passively and that the treatment regimen is not founded on a therapeutic alliance or partnership between the patient and the provider. Particularly for chronic illnesses, maintaining commitment to a therapy regimen is challenging, which frequently hinders patients from reaping the full advantages of therapies. Negative health effects include treatment failure, more frequent hospital admissions, drug resistance in some circumstances (for example, in HIV or antibiotic regimens), and higher use of healthcare resources as a result of poor adherence. Effective chronic disease self-management and successful health outcomes depend on medication adherence. HIV patients, asthmatic patients, and hypertensive patients can enhance their adherence with the use of DATs. Further analysis of both short- and long-term effectiveness if the costs of these systems will be covered by better results, fewer ER visits, and fewer inpatient stays.