“…There is evidence of crossresistance with ddI and ddC; therefore, patients who have been on those agents for lengths of time may not have as good a result with 3TC. Alternatively, patients using 3TC as initial therapy may not do as well ifswitched to ddI or ddC (Wainberg, 1994). 3TC also decreases levels of hepatitis B virus; not significantly enough to use for that indication alone, but for HIV-positive patients with chronic active hepatitis B, 3TC would be a good choice of antiretroviral therapy (Benhamou, 1995).…”