Twelve weeks of treatment with ABT-450/r-ombitasvir and dasabuvir without ribavirin was associated with high rates of sustained virologic response among previously untreated patients with HCV genotype 1 infection. Rates of virologic failure were higher without ribavirin than with ribavirin among patients with genotype 1a infection but not among those with genotype 1b infection. (Funded by AbbVie; PEARL-III and PEARL-IV ClinicalTrials.gov numbers, NCT01767116 and NCT01833533.).

No abstract

CymaBay Therapeutics.

Summary Background Virologic and safety outcomes of ombitasvir/paritaprevir/ritonavir ± dasabuvir ± ribavirin (OBV/PTV/r ± DSV ± RBV) therapy have shown high sustained virologic response (SVR) rates and good tolerability in most patient populations in pre‐registration studies. Aim To confirm these clinical trial findings in the treatment of genotype 1 and 4 hepatitis C under real‐world conditions. Methods Patients enrolled for treatment with OBV/PTV/r ± DSV ± RBV based on therapeutic guidelines were included, and the regimen was administered according to product characteristics. Clinical and laboratory data, including virologic response, were collected at baseline, end of treatment (EOT) and 12 weeks after EOT. Results A total of 209 patients with chronic hepatitis C were enrolled, most were genotype 1b‐infected (84.2%) and 119 (56.9%) had liver cirrhosis. Among these, 150 (71.7%) had failed previous anti‐viral therapies and 84 (40.2%) were null‐responders. At 12 weeks after EOT, SVR was achieved by 207 (99.0%) patients, ranging from 96.4% to 100.0% across subgroups. All Child–Pugh B and post‐orthotopic liver transplantation patients achieved SVR. Adverse events occurred in 151 (72.2%) patients and were mostly mild and associated with the use of RBV. Serious adverse events, including hepatic decompensation, renal insufficiency, anaemia, hepatotoxicity and diarrhoea, were reported in eight (3.8%) patients. In five (2.4%) patients, adverse events led to treatment discontinuation. On‐treatment decompensation was experienced by seven (3.3%) patients. Conclusions The results of our study confirm previous findings. They demonstrate excellent effectiveness and a good safety profile of OBV/PTV/r± DSV±RBV in HCV genotype 1‐infected patients treated in the real‐world setting.

Among non-cirrhotic, HCV GT1-infected patients, SVR12 rates were 97-99% with 12week, multi-targeted OBV/PTV/r+DSV±RBV regimens and 66-82% with 24-48 total weeks of TPV+PegIFN/RBV. OBV/PTV/r+DSV±RBV was associated with a generally better mental and physical health, more favorable tolerability, and lower rates of treatment discontinuation due to adverse events.