U
Undetectable Viral Load
When the amount of HIV in the blood is too low to be detected with a viral load (HIV RNA) test. Antiretroviral (ARV) drugs may reduce a person's viral load to an undetectable level; however, that does not mean the person is cured. Some HIV, in the form of latent HIV reservoirs, remain inside cells and in body tissues.
See Related Term(s): Latent HIV Reservoir, Viral Load Test
Urinalysis
Physical, chemical, and microscopic examination of urine. Urinalysis can detect a specific substance, such as glucose or blood, in the urine—this can be helpful in diagnosing a disease or monitoring the body's response to treatment.
Urolithiasis
Calculi (stones) in the urinary tract. Use of some antiretroviral (ARV) drugs may cause urolithiasis.
Urticaria
Also known as: Hives
Raised, swollen, itchy areas on the skin or mucous membranes, usually caused by an allergic reaction to a drug or food.