Thank you for your questions.
I am surprised by the treatment regimen that your husband's physician has chosen. Combivir (ZDV/3TC) is a very potent, convenient combination of drugs; as you point out, it is a rare situation in the developed world where two drug therapy is used. Most clinical experts would advocate three- or even four-drug therapy for treatment naive persons with HIV infection. This statement is based on a number of clinical studies that have shown inferiority of dual nucleoside combinations in comparison to triple-drug combinations of dual nucleosides with protease inhibitors. Such treatment inferiority has the significant long-term complication of the emergence of premature or avoidable drug resistance. Potent combinations might include Combivir as part of the regimen, usually combined with a NNRTI or protease inhibitor, but this and other dual nucleoside combinations are considered suboptimal.
It is important to understand what your husband's viral load and CD4 count are, under conditions of very low viral loads, some might consider the use of dual nucleosides, but this is generally discouraged. I would strongly advise close clinical and laboratory monitoring of your husbands CD4 count and viral load, ask lots of questions of your health care providers. Good luck, BY