functional obsolescence. Impairment of the usefulness of a device or equipment due to a design defect, or due to its inability to be upgraded or modified to serve the user's current needs.efinition. Impairment of the usefulness of a device or equipment due to a design defect, or due to its inability to be upgraded or modified to serve the user's current needs. For example, a relatively new computer becomes functionally obsolete if it cannot run the latest program or peripheral the user wishes to use.
Current US DHHS guidelines (published April 8, 2015) state: 1  Antiretroviral therapy (ART) is recommended for all HIV-infected individuals to reduce the risk of disease progression. 2  ART also is recommended for HIV-infected individuals for the prevention of transmission of HIV.
HIV Medications. Several different classes of medications for HIV are available. These classes are divided into seven different groups and include NRTIs, NNRTIs, NtRTIs, protease inhibitors, entry inhibitors, integrase inhibitors, and combination medications. In most cases, people with HIV or AIDS use medications from several of these classes.