A Controlled Trial Comparing Continued Zidovudine with Didanosine in Human Immunodeficiency Virus Infection

Abstract
Although zidovudine is effective in patients with human immunodeficiency virus (HIV) infection, its efficacy may decline with prolonged use. Didanosine is another inhibitor of HIV reverse transcriptase. We evaluated the effectiveness of changing anti-HIV treatment from zidovudine to didanosine.