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|Enanta Announces CHMP Grants Positive Opinion for an Eight-Week Treatment Option with AbbVie’s VIEKIRAX® (ombitasvir/paritaprevir/ritonavir tablets) + EXVIERA® (dasabuvir tablets) for Patients with Genotype 1b Chronic Hepatitis C|
VIEKIRAX + EXVIERA is currently approved in the
Approximately 160 million people worldwide are infected with HCV, with
GT1b being the most common subtype globally.2,5 In
The CHMP positive opinion is supported by data from the dedicated Phase 3b GARNET study. Results showed that with eight weeks of treatment with VIEKIRAX + EXVIERA, 98 percent (n= 160/163) of previously untreated GT1b chronic HCV infected patients without cirrhosis achieved sustained virologic response at 12 weeks post-treatment (SVR12).1 The most commonly reported adverse events, occurring at rates equal to or greater than 5 percent, were headache (21 percent), fatigue (17 percent), nasopharyngitis (8 percent), pruritus (8 percent), nausea (6 percent) and asthenia (5 percent).
*When assessing severity of liver disease using non-invasive methods, additional blood tests improve accuracy and should be undertaken prior to 8 week treatment in all patients with moderate fibrosis.
About AbbVie’s GARNET Study1
The Phase 3b GARNET study was a multicenter, open-label, single-arm study, investigating the safety and efficacy of eight weeks of treatment with VIEKIRAX + EXVIERA without ribavirin in treatment-naïve patients with GT1b chronic HCV infection without cirrhosis.1 The study enrolled 166 patients across 20 sites around the world. Of the 166 patients enrolled, 163 patients had GT1b chronic HCV infection without cirrhosis and three patients with other HCV genotypes were excluded from the efficacy analysis. The primary endpoint was the percentage of patients who achieved SVR12.
Two patients experienced post-treatment relapse and one discontinued due to noncompliance. Less than one percent of patients experienced serious adverse events or clinically significant (Grade ≥3) laboratory abnormalities. One patient discontinued treatment on Day 45 due to an adverse event but achieved SVR12.
Additional information about the GARNET study can be found on www.clinicaltrials.gov.
VIEKIRAX® + EXVIERA®
VIEKIRAX + EXVIERA is approved in the
VIEKIRAX tablets consist of the fixed-dose combination of paritaprevir 150mg (NS3/4A protease inhibitor) and ritonavir 100mg with ombitasvir 25mg (NS5A inhibitor), dosed once daily. EXVIERA tablets consist of dasabuvir 250mg (non-nucleoside NS5B polymerase inhibitor) dosed twice daily. VIEKIRAX + EXVIERA is taken with or without ribavirin (RBV), dosed twice daily based on patient type. VIEKIRAX + EXVIERA is taken for 12 weeks with or without RBV, except in genotype 1a patients with compensated cirrhosis (Child-Pugh A), who should take it for 24 weeks with RBV.
VIEKIRAX is indicated in combination with other medicinal products for the treatment of chronic hepatitis C (CHC) in adults. EXVIERA is indicated in combination with other medicinal products for the treatment of CHC in adults.
Important EU Safety Information
VIEKIRAX + EXVIERA are contraindicated in patients with severe hepatic impairment (Child-Pugh C). Patients taking ethinyl estradiol-containing medicinal products must discontinue them and switch to an alternative method of contraception prior to initiating VIEKIRAX + EXVIERA. Do not give VIEKIRAX with certain drugs that are sensitive CYP3A substrates or strong inhibitors of CYP3A. Do not give VIEKIRAX and EXVIERA with strong or moderate enzyme inducers. Do not give EXVIERA with certain drugs that are strong inhibitors of CYP2C8.
Special warnings and precautions for use
VIEKIRAX and EXVIERA are not recommended as monotherapy and should be used in combination with other medicinal products for the treatment of hepatitis C infection.
Risk of Hepatic Decompensation and Hepatic Failure in Patients with Cirrhosis
VIEKIRAX and EXVIERA are not recommended in patients with moderate hepatic impairment (Child-Pugh B). Patients with cirrhosis should be monitored for signs and symptoms of hepatic decompensation, including hepatic laboratory testing at baseline and during treatment.
Transient elevations of ALT to >5x ULN without concomitant elevations of bilirubin occurred in clinical trials with VIEKIRAX + EXVIERA and were more frequent in a subgroup who were using ethinyl estradiol-containing contraceptives.
Pregnancy and concomitant use with ribavirin
Extreme caution must be taken to avoid pregnancy in female patients and female partners of male patients when VIEKIRAX with or without EXVIERA is taken in combination with ribavirin, see section 4.6 and refer to the Summary of Product Characteristics for ribavirin for additional information.
Use with concomitant medicinal products
Use caution when administering VIEKIRAX with fluticasone or other glucocorticoids that are metabolized by CYP3A4. A reduction in colchicine dosage or interruption in colchicine is recommended in patients with normal renal or hepatic function. VIEKIRAX with or without EXVIERA is expected to increase exposure of statins so certain statins need to be discontinued or dosages reduced. Low dose ritonavir, which is part of VIEKIRAX, may select for PI resistance in HIV co-infected patients without ongoing antiretroviral therapy. HIV co-infected patients without suppressive antiretroviral therapy should not be treated with VIEKIRAX.
Most common (>20 percent) adverse reactions for VIEKIRAX + EXVIERA with RBV were fatigue and nausea.
Full summary of product characteristics is available at www.ema.europa.eu
Globally, prescribing information varies; refer to the individual country product label for complete information.
Enanta has discovered novel protease inhibitors for use against the
hepatitis C virus (HCV). These protease inhibitors, developed through
Enanta’s collaboration with
Forward Looking Statements
This press release contains forward-looking statements, including
statements with respect to the prospects for approval of the label
expansion for AbbVie’s VIEKIRAX + EXVIERA regimen as an eight-week
treatment in the E. U. for GT1b HCV.. Statements that are not historical
facts are based on management’s current expectations, estimates,
forecasts and projections about Enanta’s business and the industry in
which it operates and management’s beliefs and assumptions. The
statements contained in this release are not guarantees of future
performance and involve certain risks, uncertainties and assumptions,
which are difficult to predict. Therefore, actual outcomes and results
may differ materially from what is expressed in such forward-looking
statements. Important factors and risks that may affect actual results
include: the efforts of
1 Welzel, T. et al. GARNET: High SVR Rates Following
Eight-Week Treatment with Ombitasvir/Paritaprevir/Ritonavir + Dasabuvir
for Patients with HCV Genotype 1b Infection. Presented at the
2 Gower E. et al. Global epidemiology and genotype
distribution of the hepatitis C virus infection.
3 O'Leary JG, Davis GL. Hepatitis C. In: Feldman M, Friedman
LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver
Disease: Pathophysiology/Diagnosis/Management. 9th ed, Vol 1.
4 Hatzakis A. et al. The state of hepatitis B and C in
5 Lavanchy D. Evolving epidemiology of hepatitis C virus. Clin Microbiol Infect. 2011; 17(2):107-15.