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.
Tell your doctor about all your current medicines and any you start or stop using, especially: 1  digoxin; 2  a diuretic or water pill; 3  methotrexate; rifampin;  St. John's 1  wort; voriconazole;  warfarin (Coumadin, Jantoven); 1  or. HIV or AIDS medicine--atazanavir, nelfinavir, ritonavir, saquinavir.