***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: Two randomised controlled trials contributed to this literature, enrolling 586 participants, and found no critical difference between TDF and AZT in regards to serious adverse events or virologic response. The trials did find higher rates of adherence and immunologic response in TDF-containing regimens compared with those containing AZT. The quality of the literature to support this conclusion is moderate to high. Drug resistance was more common for TDF than AZT, but the quality of this literature is low, with only one study reporting this outcome. It should be noted that the two studies compared two different drugs in addition to TDF and AZT; one had lamivudine (3TC) and nevirapine (NVP) and the other had emtricitabine (FTC) and efavirenz (EFV). We conclude that for the critical outcomes of virologic response and serious adverse events initial ART regimens containing TDF are equivalent to those containing AZT. However, TDF is superior to AZT in terms of immunologic response and adherence and more frequent emergence of resistance. How much the other drugs in the regimens contributed to these findings is unclear, and true head-to-head trials are still warranted. The role of each drug in initial ART will likely be driven by their specific toxicities.
Output:

The purpose of this review was to assess which of these two medications was the best for initial treatment for people living with HIV, and through our search we identified two randomised controlled trials. We did not find any critical difference between the two medications in regards to serious adverse events or virologic response, but did find that TDF is superior to AZT in terms of immunologic response and adherence and more frequent emergence of resistance. However, these two studies are not directly comparable because they used two related different drugs in addition to TDF and AZT. Future studies and recommendations should focus on specific toxicities and tolerability when comparing these two medications.