Gilead 
                Provides Update on Development of Fixed-Dose Regimen of Truvada 
                and Tibotec Pharmaceuticals' TMC278
              
                 
                  |  | Pivotal 
                    Phase III Studies of TMC278 Met Primary Objective | 
                 
                  |  | Gilead 
                    Working to Identify Fixed-dose Regimen Candidate Suitable 
                    for Registration | 
              
              Foster 
                City, Calif. -- Apr 20, 2010 -- Gilead Sciences, Inc. provided 
                an update today on the development of the fixed-dose combination 
                of Truvada (emtricitabine and tenofovir disoproxil fumarate) and 
                Tibotec Pharmaceuticals' investigational non-nucleoside reverse 
                transcriptase inhibitor (NNRTI) TMC278 (rilpivirine hydrochloride, 
                25 mg). 
                
                As part of its First Quarter 2010 earnings call, Johnson & 
                Johnson, which owns Tibotec Pharmaceuticals, announced today that 
                the two pivotal Phase III studies evaluating TMC278 as a treatment 
                for HIV in treatment-naive patients met the primary efficacy objective 
                of non-inferiority as compared to efavirenz 
                based on the proportion of patients achieving HIV RNA levels 
                of less than 50 copies/mL at 48 weeks. Johnson & Johnson also 
                announced that full study results will be presented at a scientific 
                meeting later this year, and that the submission of TMC278 for 
                regulatory review is on track for the third quarter of this year.
                
                Gilead is working to identify a formulation of the fixed-dose 
                combination of Truvada and TMC278 that meets bioequivalence. A 
                bioequivalence study is required to demonstrate that a co-formulated 
                product results in the same levels of medication in the blood 
                as achieved when the individual products are dosed simultaneously 
                as separate pills.
                
                In July 2009, Gilead announced that it had entered into a license 
                and collaboration agreement with Tibotec Pharmaceuticals for the 
                development and commercialization of a new once-daily fixed-dose 
                antiretroviral regimen containing Truvada and TMC278 for treatment-naive 
                HIV-infected individuals. The companies are also working toward 
                an agreement to make the fixed-dose combination of Truvada and 
                TMC278 available in the developing world. If approved, the new 
                product would become the second complete antiretroviral treatment 
                regimen for HIV available in a single tablet taken once daily.
                
                The fixed-dose single-tablet combination of Truvada and TMC278 
                is an investigational product and the safety and efficacy have 
                not yet been established. 
                
                For more information on Gilead Sciences, please visit www.gilead.com. 
                
                
                4/23/10
              Source
                Gilead 
                Sciences. Gilead Provides Update on Development of Fixed-Dose 
                Regimen of Truvada and Tibotec Pharmaceuticals' TMC278. Press 
                release April 20, 2010.