MedPage Today -- CAPE TOWN, South Africa, July 23 -- For patients doing well on their first anti-HIV regimen, the treatment can be simplified by dropping a controversial drug, a researcher said here. In the randomized section of a two-stage trial, patients treated without the protease inhibitor ritonavir (Norvir) did as well as those whose regimens included the drug, according to Kathleen Squires, MD, of Thomas Jefferson University in Philadelphia.