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.
Atripla is the name of a pill that contains the following three anti-HIV drugs: 1  efavirenz (Sustiva), which belongs to a group or class of drugs called non-nukes or NNRTIs. 2  tenofovir (Viread), which belongs to a group of drugs called nucleotide analogues.