(Description regarding monitoring, from ''Warnings'' section)
(Description regarding monitoring, from ''Warnings'' section)
|overdose====Acute Overdose===
|overdose=*No specific antidote is available for overdose with HARVONI. If overdose occurs, the patient must be monitored for evidence of toxicity. Treatment of overdose with HARVONI consists of general supportive measures including monitoring of vital signs as well as observation of the clinical status of the patient. Hemodialysis is unlikely to result in significant removal of ledipasvir since ledipasvir is highly bound to plasma protein. Hemodialysis can efficiently remove the predominant circulating metabolite of sofosbuvir, GS-331007, with an extraction ratio of 53%.
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Black Box Warning
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Overview
Ledipasvir / sofosbuvir is a Acetylcholine release inhibitor, Adrenergic receptor agonist that is FDA approved for the (type of indication of drug) of a list of indications, separated by commas.. There is a Black Box Warning for this drug as shown here. Common adverse reactions include a list of adverse reactions, separated by commas..
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Pregnancy
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There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Ledipasvir / sofosbuvir in women who are pregnant.
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Administration and Monitoring
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IV Compatibility
There is limited information regarding the compatibility of Ledipasvir / sofosbuvir and IV administrations.
Overdosage
No specific antidote is available for overdose with HARVONI. If overdose occurs, the patient must be monitored for evidence of toxicity. Treatment of overdose with HARVONI consists of general supportive measures including monitoring of vital signs as well as observation of the clinical status of the patient. Hemodialysis is unlikely to result in significant removal of ledipasvir since ledipasvir is highly bound to plasma protein. Hemodialysis can efficiently remove the predominant circulating metabolite of sofosbuvir, GS-331007, with an extraction ratio of 53%.
HARVONI is a fixed-dose combination of ledipasvir and sofosbuvir which are direct-acting antiviral agents against the hepatitis C virus.
Structure
Ledipasvir
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Sofosbuvir
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Pharmacodynamics
Cardiac Electrophysiology
Thorough QT studies have been conducted for ledipasvir and sofosbuvir.
The effect of ledipasvir 120 mg twice daily (2.67 times the maximum recommended dosage) for 10 days on QTc interval was evaluated in a randomized, multiple-dose, placebo-, and active-controlled (moxifloxacin 400 mg) three period crossover thorough QT trial in 59 healthy subjects. At the dose of 120 mg twice daily (2.67 times the maximum recommended dosage), ledipasvir does not prolong QTc interval to any clinically relevant extent.
The effect of sofosbuvir 400 mg (maximum recommended dosage) and 1200 mg (three times the maximum recommended dosage) on QTc interval was evaluated in a randomized, single-dose, placebo-, and active-controlled (moxifloxacin 400 mg) four period crossover thorough QT trial in 59 healthy subjects. At a dose three times the maximum recommended dose, sofosbuvir does not prolong QTc to any clinically relevant extent.
Pharmacokinetics
Absorption
The pharmacokinetic properties of ledipasvir, sofosbuvir, and the predominant circulating metabolite GS-331007 have been evaluated in healthy adult subjects and in subjects with chronic hepatitis C. Following oral administration of HARVONI, ledipasvir median peak concentrations were observed 4 to 4.5 hours post-dose. Sofosbuvir was absorbed quickly and the peak median plasma concentration was observed ~0.8 to 1 hour post-dose. Median peak plasma concentration of GS-331007 was observed between 3.5 to 4 hours post-dose.
Based on the population pharmacokinetic analysis in HCV-infected subjects, geometric mean steady-state AUC0–24 for ledipasvir (N=2113), sofosbuvir (N=1542), and GS-331007 (N=2113) were 7290, 1320, and 12,000 ng∙hr/mL, respectively. Steady-state Cmax for ledipasvir, sofosbuvir, and GS-331007 were 323, 618, and 707 ng/mL, respectively. Sofosbuvir and GS-331007 AUC0–24 and Cmax were similar in healthy adult subjects and subjects with HCV infection. Relative to healthy subjects (N=191), ledipasvir AUC0–24 and Cmax were 24% lower and 32% lower, respectively, in HCV-infected subjects.
Effect of Food
Relative to fasting conditions, the administration of a single dose of HARVONI with a moderate fat (~600 kcal, 25% to 30% fat) or high fat (~1000 kcal, 50% fat) meal increased sofosbuvir AUC0–inf by approximately 2-fold, but did not significantly affect sofosbuvir Cmax. The exposures of GS-331007 and ledipasvir were not altered in the presence of either meal type. The response rates in Phase 3 trials were similar in HCV-infected subjects who received HARVONI with food or without food. HARVONI can be administered without regard to food.
Distribution
Ledipasvir is greater than 99.8% bound to human plasma proteins. After a single 90 mg dose of [14C]-ledipasvir in healthy subjects, the blood to plasma ratio of 14C-radioactivity ranged between 0.51 and 0.66.
Sofosbuvir is approximately 61–65% bound to human plasma proteins and the binding is independent of drug concentration over the range of 1 microgram/mL to 20 microgram/mL. Protein binding of GS-331007 was minimal in human plasma. After a single 400 mg dose of [14C]-sofosbuvir in healthy subjects, the blood to plasma ratio of 14C-radioactivity was approximately 0.7.
Metabolism
In vitro, no detectable metabolism of ledipasvir was observed by human CYP1A2, CYP2C8, CYP2C9, CYP2C19, CYP2D6, and CYP3A4. Evidence of slow oxidative metabolism via an unknown mechanism has been observed. Following a single dose of 90 mg [14C]-ledipasvir, systemic exposure was almost exclusively to the parent drug (greater than 98%). Unchanged ledipasvir is the major species present in feces.
Sofosbuvir is extensively metabolized in the liver to form the pharmacologically active nucleoside analog triphosphate GS-461203. The metabolic activation pathway involves sequential hydrolysis of the carboxyl ester moiety catalyzed by human cathepsin A (CatA) or carboxylesterase 1 (CES1) and phosphoramidate cleavage by histidine triad nucleotide-binding protein 1 (HINT1) followed by phosphorylation by the pyrimidine nucleotide biosynthesis pathway. Dephosphorylation results in the formation of nucleoside metabolite GS-331007 that cannot be efficiently rephosphorylated and lacks anti-HCV activity in vitro. After a single 400 mg oral dose of [14C]-sofosbuvir, GS-331007 accounted for approximately greater than 90% of total systemic exposure.
Elimination
Following a single 90 mg oral dose of [14C]-ledipasvir, mean total recovery of the [14C]-radioactivity in feces and urine was approximately 87%, with most of the radioactive dose recovered from feces (approximately 86%). Unchanged ledipasvir excreted in feces accounted for a mean of 70% of the administered dose and the oxidative metabolite M19 accounted for 2.2% of the dose. These data indicate that biliary excretion of unchanged ledipasvir is a major route of elimination, with renal excretion being a minor pathway (approximately 1%). The median terminal half-life of ledipasvir following administration of HARVONI was 47 hours.
Following a single 400 mg oral dose of [14C]-sofosbuvir, mean total recovery of the dose was greater than 92%, consisting of approximately 80%, 14%, and 2.5% recovered in urine, feces, and expired air, respectively. The majority of the sofosbuvir dose recovered in urine was GS-331007 (78%) while 3.5% was recovered as sofosbuvir. These data indicate that renal clearance is the major elimination pathway for GS-331007. The median terminal half-lives of sofosbuvir and GS-331007 following administration of HARVONI were 0.5 and 27 hours, respectively.
Specific Populations
Race: Population pharmacokinetics analysis in HCV-infected subjects indicated that race had no clinically relevant effect on the exposure of ledipasvir, sofosbuvir, and GS-331007.
Gender: Population pharmacokinetics analysis in HCV-infected subjects indicated that gender had no clinically relevant effect on the exposure of sofosbuvir and GS-331007. AUC and Cmax of ledipasvir were 77% and 58% higher, respectively, in females than males; however, the relationship between gender and ledipasvir exposures was not considered clinically relevant, as high response rates (SVR12 >90%) were achieved in male and female subjects across the Phase 3 studies and the safety profiles are similar in females and males.
Pediatric Patients: The pharmacokinetics of ledipasvir, sofosbuvir, and GS-331007 were determined in 100 pediatric subjects 12 years of age and older infected with HCV genotype 1 receiving a daily dose of HARVONI (90 mg ledipasvir and 400 mg sofosbuvir). The pharmacokinetic properties of ledipasvir, sofosbuvir, and GS-331007 in pediatric subjects 12 years of age and older are provided in Table 6. Exposures in pediatric subjects were similar to those observed in adults.
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The pharmacokinetics of ledipasvir or sofosbuvir have not been established in pediatric patients less than 12 years of age.
Geriatric Patients: Population pharmacokinetic analysis in HCV-infected subjects showed that within the age range (18 to 80 years) analyzed, age did not have a clinically relevant effect on the exposure to ledipasvir, sofosbuvir, and GS-331007.
Patients with Renal Impairment: The pharmacokinetics of ledipasvir were studied with a single dose of 90 mg ledipasvir in HCV negative subjects with severe renal impairment (eGFR less than 30 mL/min by Cockcroft-Gault). No clinically relevant differences in ledipasvir pharmacokinetics were observed between healthy subjects and subjects with severe renal impairment.
The pharmacokinetics of sofosbuvir were studied in HCV negative subjects with mild (eGFR between 50 to less than 80 mL/min/1.73 m2), moderate (eGFR between 30 to less than 50 mL/min/1.73 m2), severe renal impairment (eGFR less than 30 mL/min/1.73 m2), and subjects with ESRD requiring hemodialysis following a single 400 mg dose of sofosbuvir. Relative to subjects with normal renal function (eGFR greater than 80 mL/min/1.73 m2), the sofosbuvir AUC0–inf was 61%, 107%, and 171% higher in mild, moderate, and severe renal impairment, while the GS-331007 AUC0–inf was 55%, 88%, and 451% higher, respectively. In subjects with ESRD, relative to subjects with normal renal function, sofosbuvir and GS-331007 AUC0–inf was 28% and 1280% higher when sofosbuvir was dosed 1 hour before hemodialysis compared with 60% and 2070% higher when sofosbuvir was dosed 1 hour after hemodialysis, respectively. A 4 hour hemodialysis session removed approximately 18% of administered dose.
Patients with Hepatic Impairment: The pharmacokinetics of ledipasvir were studied with a single dose of 90 mg ledipasvir in HCV negative subjects with severe hepatic impairment (Child-Pugh Class C). Ledipasvir plasma exposure (AUC0–inf) was similar in subjects with severe hepatic impairment and control subjects with normal hepatic function. Population pharmacokinetics analysis in HCV-infected subjects indicated that cirrhosis (including decompensated cirrhosis) had no clinically relevant effect on the exposure of ledipasvir.
The pharmacokinetics of sofosbuvir were studied following 7-day dosing of 400 mg sofosbuvir in HCV-infected subjects with moderate and severe hepatic impairment (Child-Pugh Class B and C). Relative to subjects with normal hepatic function, the sofosbuvir AUC0–24 were 126% and 143% higher in moderate and severe hepatic impairment, while the GS-331007 AUC0–24 were 18% and 9% higher, respectively. Population pharmacokinetics analysis in HCV-infected subjects indicated that cirrhosis (including decompensated cirrhosis) had no clinically relevant effect on the exposure of sofosbuvir and GS-331007.
Drug Interaction Studies
Ledipasvir and sofosbuvir are substrates of drug transporters P-gp and BCRP while GS-331007 is not. P-gp inducers (e.g., rifampin or St. John's wort) may decrease ledipasvir and sofosbuvir plasma concentrations, leading to reduced therapeutic effect of HARVONI, and the use with P-gp inducers is not recommended with HARVONI. Coadministration with drugs that inhibit P-gp and/or BCRP may increase ledipasvir and sofosbuvir plasma concentrations without increasing GS-331007 plasma concentration; HARVONI may be coadministered with P-gp and/or BCRP inhibitors. Neither ledipasvir nor sofosbuvir is a substrate for hepatic uptake transporters OCT1, OATP1B1, or OATP1B3. GS-331007 is not a substrate for renal transporters, including organic anion transporter OAT1 or OAT3, or organic cation transporter OCT2.
Ledipasvir is subject to slow oxidative metabolism via an unknown mechanism. In vitro, no detectable metabolism of ledipasvir by CYP enzymes has been observed. Biliary excretion of unchanged ledipasvir is a major route of elimination. Sofosbuvir is not a substrate for CYP and UGT1A1 enzymes. Clinically significant drug interactions with HARVONI mediated by CYP or UGT1A1 enzymes are not expected.
No effect on the pharmacokinetic parameters of ledipasvir, sofosbuvir, and GS-331007 was observed with raltegravir and the combination of abacavir and lamivudine; emtricitabine, rilpivirine, and tenofovir disoproxil fumarate; or dolutegravir, emtricitabine, and tenofovir disoproxil fumarate.
Ledipasvir is an inhibitor of drug transporter P-gp and breast cancer resistance protein (BCRP) and may increase intestinal absorption of coadministered substrates for these transporters. Ledipasvir is an inhibitor of transporters OATP1B1, OATP1B3, and BSEP only at concentrations exceeding those achieved in clinic. Ledipasvir is not an inhibitor of transporters MRP2, MRP4, OCT2, OAT1, OAT3, MATE1, and OCT1. The drug-drug interaction potential of ledipasvir is primarily limited to the intestinal inhibition of P-gp and BCRP. Clinically relevant transporter inhibition by ledipasvir in the systemic circulation is not expected due to its high protein binding. Sofosbuvir and GS-331007 are not inhibitors of drug transporters P-gp, BCRP, MRP2, BSEP, OATP1B1, OATP1B3, and OCT1, and GS-331007 is not an inhibitor of OAT1, OCT2, and MATE1.
Ledipasvir, sofosbuvir, and GS-331007 are not inhibitors or inducers of CYP or UGT1A1 enzymes.
The effects of ledipasvir or sofosbuvir on the exposure of coadministered drugs are shown in Table 8.
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No effect on the pharmacokinetic parameters of the following coadministered drugs was observed with ledipasvir or sofosbuvir: abacavir, cyclosporine, darunavir/ritonavir, dolutegravir, efavirenz, emtricitabine, lamivudine, methadone, or rilpivirine.
Nonclinical Toxicology
Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenesis and Mutagenesis
Ledipasvir: Ledipasvir was not genotoxic in a battery of in vitro or in vivo assays, including bacterial mutagenicity, chromosome aberration using human peripheral blood lymphocytes, and in vivo rat micronucleus assays.
Ledipasvir was not carcinogenic in a 6-month rasH2 transgenic mouse study (up to 300 mg/kg/day). Similarly, ledipasvir was not carcinogenic in a 2-year rat study (up to 100 mg/kg/day in males and 30 mg/kg/day in females), resulting in exposures approximately 10 and 4 times, respectively, higher than the exposure in humans at the recommended human dose (RHD).
Sofosbuvir: Sofosbuvir was not genotoxic in a battery of in vitro or in vivo assays, including bacterial mutagenicity, chromosome aberration using human peripheral blood lymphocytes, and in vivo mouse micronucleus assays.
Sofosbuvir was not carcinogenic in a 2-year mouse study (up to 200 mg/kg/day in males and 600 mg/kg/day in females) and in a 2-year rat study (up to 750 mg/kg/day), resulting in exposures of the predominant circulating metabolite GS-331007 of approximately 4 and 18 times (in mice) and 8 and 10 times (in rats), in males and females respectively, the exposure in humans at the RHD.
Impairment of Fertility
Ledipasvir: Ledipasvir had no adverse effects on mating and fertility. In female rats, the mean number of corpora lutea and implantation sites were reduced slightly at maternal exposures approximately 3 times the exposure in humans at the RHD. At the highest dose levels without effects, exposures of ledipasvir were approximately 5 and 2 times, in males and females, respectively, the exposure in humans at the RHD.
Sofosbuvir: Sofosbuvir had no effects on embryo-fetal viability or on fertility when evaluated in rats. At the highest dose tested, exposure to the predominant circulating metabolite GS-331007 was approximately 5 times the exposure in humans at the RHD.
Clinical Studies
Description of Clinical Trials
The efficacy and safety of HARVONI were evaluated in four trials in genotype 1 HCV mono-infected subjects including one trial exclusively in treatment-experienced subjects with compensated cirrhosis (Child-Pugh A), one trial in genotype 1 or 4 HCV/HIV-1 coinfected subjects, two trials in genotype 4, 5, or 6 HCV mono-infected subjects, two trials in genotype 1 or 4 HCV infected pretransplant subjects with decompensated cirrhosis (Child-Pugh B and C) or post-transplant with Metavir F0–F3 fibrosis, compensated cirrhosis, decompensated cirrhosis, or fibrosing cholestatic hepatitis (FCH), and one trial in genotype 1 HCV pediatric subjects 12 years of age and older without cirrhosis or with compensated cirrhosis, as summarized in Table 9.
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HARVONI was administered once daily by mouth in these trials. For subjects without cirrhosis or with compensated cirrhosis who received ribavirin (RBV), the RBV dosage was 1000 mg per day for subjects weighing less than 75 kg or 1200 mg per day for subjects weighing at least 75 kg. For subjects with decompensated cirrhosis in SOLAR-1 and SOLAR-2 studies, the starting RBV dosage was 600 mg per day regardless of transplantation status. RBV dose adjustments were performed according to the RBV labeling.
Serum HCV RNA values were measured during the clinical trials using the COBAS TaqMan HCV test (version 2.0), for use with the High Pure System in ION-3, ION-1, ION-2, SIRIUS, and ION-4 studies or the COBAS AmpliPrep/COBAS Taqman HCV test (version 2.0) in ELECTRON-2, 1119, SOLAR-1, SOLAR-2, and 1116 studies. The COBAS TaqMan HCV test (version 2.0) for use with the High Pure System has a lower limit of quantification (LLOQ) of 25 IU per mL and the COBAS AmpliPrep/COBAS Taqman HCV test (version 2.0) has a LLOQ of 15 IU per mL. Sustained virologic response (SVR12), defined as HCV RNA less than LLOQ at 12 weeks after the cessation of treatment, was the primary endpoint in studies in adults and the key efficacy endpoint in the study in pediatric subjects 12 years of age and older. Relapse was a secondary endpoint, which was defined as HCV RNA greater than or equal to LLOQ with 2 consecutive values or last available post-treatment measurement during the post-treatment period after achieving HCV RNA less than LLOQ at end of treatment.
Clinical Trials in Subjects with Genotype 1 HCV
Treatment-Naïve Adults without Cirrhosis ─ ION-3 (Study 0108)
ION-3 was a randomized, open-label trial in treatment-naïve non-cirrhotic subjects with genotype 1 HCV. Subjects were randomized in a 1:1:1 ratio to one of the following three treatment groups and stratified by HCV genotype (1a vs 1b): HARVONI for 8 weeks, HARVONI for 12 weeks, or HARVONI + ribavirin for 8 weeks.
Demographics and baseline characteristics were balanced across the treatment groups. Of the 647 treated subjects, the median age was 55 years (range: 20 to 75); 58% of the subjects were male; 78% were White; 19% were Black; 6% were Hispanic or Latino; mean body mass index was 28 kg/m2 (range: 18 to 56 kg/m2); 81% had baseline HCV RNA levels greater than or equal to 800,000 IU per mL; 80% had genotype 1a HCV infection; 73% had non-C/C IL28B alleles (CT or TT).
Table 10 presents the SVR12 for the HARVONI treatment groups in the ION-3 trial after 8 and 12 weeks of HARVONI treatment. Ribavirin was not shown to increase the SVR12 observed with HARVONI. Therefore, the HARVONI + ribavirin arm is not presented in Table 10.
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The treatment difference between the 8-week treatment of HARVONI and 12-week treatment of HARVONI was –2.3% (97.5% confidence interval –7.2% to 2.5%). Among subjects with a baseline HCV RNA less than 6 million IU per mL, the SVR12 was 97% (119/123) with 8-week treatment of HARVONI and 96% (126/131) with 12-week treatment of HARVONI.
Relapse rates by baseline viral load are presented in Table 11.
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Treatment-Naïve Adults with or without Cirrhosis ─ ION-1 (Study 0102)
ION-1 was a randomized, open-label trial that evaluated 12 and 24 weeks of treatment with HARVONI with or without ribavirin in 865 treatment-naïve subjects with genotype 1 HCV including those with cirrhosis. Subjects were randomized in a 1:1:1:1 ratio to receive HARVONI for 12 weeks, HARVONI + ribavirin for 12 weeks, HARVONI for 24 weeks, or HARVONI + ribavirin for 24 weeks. Randomization was stratified by the presence or absence of cirrhosis and HCV genotype (1a vs 1b).
Demographics and baseline characteristics were balanced across the treatment groups. Of the 865 treated subjects, the median age was 54 years (range: 18 to 80); 59% of the subjects were male; 85% were White; 12% were Black; 12% were Hispanic or Latino; mean body mass index was 27 kg/m2 (range: 18 to 48 kg/m2); 79% had baseline HCV RNA levels greater than or equal to 800,000 IU per mL; 67% had genotype 1a HCV infection; 70% had non-C/C IL28B alleles (CT or TT); and 16% had cirrhosis.
Table 12 presents the SVR12 for the treatment group of HARVONI for 12 weeks in the ION-1 trial. Ribavirin was not shown to increase SVR12 observed with HARVONI. Therefore, the HARVONI + ribavirin arm is not presented in Table 12.
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SVR12 for selected subgroups are presented in Table 13.
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Previously-Treated Adults with or without Cirrhosis ─ ION-2 (Study 0109)
ION-2 was a randomized, open-label trial that evaluated 12 and 24 weeks of treatment with HARVONI with or without ribavirin in genotype 1 HCV-infected subjects with or without cirrhosis who failed prior therapy with an interferon-based regimen, including regimens containing an HCV protease inhibitor. Subjects were randomized in a 1:1:1:1 ratio to receive HARVONI for 12 weeks, HARVONI + ribavirin for 12 weeks, HARVONI for 24 weeks, or HARVONI + ribavirin for 24 weeks. Randomization was stratified by the presence or absence of cirrhosis, HCV genotype (1a vs 1b) and response to prior HCV therapy (relapse/breakthrough vs nonresponse).
Demographics and baseline characteristics were balanced across the treatment groups. Of the 440 treated subjects, the median age was 57 years (range: 24 to 75); 65% of the subjects were male; 81% were White; 18% were Black; 9% were Hispanic or Latino; mean body mass index was 28 kg/m2 (range: 19 to 50 kg/m2); 89% had baseline HCV RNA levels greater than or equal to 800,000 IU per mL; 79% had genotype 1a HCV infection; 88% had non-C/C IL28B alleles (CT or TT); and 20% had cirrhosis. Forty-seven percent (47%) of the subjects failed a prior therapy of pegylated interferon and ribavirin. Among these subjects, 49% were relapse/breakthrough and 51% were non-responder. Fifty-three percent (53%) of the subjects failed a prior therapy of pegylated interferon and ribavirin with an HCV protease inhibitor. Among these subjects, 62% were relapse/breakthrough and 38% were non-responder.
Table 14 presents the SVR12 for the HARVONI treatment groups in the ION-2 trial. Ribavirin was not shown to increase SVR12 observed with HARVONI. Therefore, the HARVONI + ribavirin arms are not presented in Table 14.
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Among the subjects with available SVR12 and SVR24 data (206/218), all subjects who achieved SVR12 in the ION-2 study also achieved SVR24.
SVR12 and relapse rates for selected subgroups are presented in Tables 15 and 16.
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Previously-Treated Adults with Cirrhosis ─ SIRIUS (Study 0121)
SIRIUS was a randomized, double-blind and placebo-controlled trial that evaluated the efficacy of HARVONI + ribavirin for 12 weeks or HARVONI without ribavirin for 24 weeks in genotype 1 HCV-infected subjects with compensated cirrhosis who failed prior therapy with a Peg-IFN + RBV regimen followed by a subsequent Peg-IFN + RBV + an HCV protease inhibitor regimen. Subjects were randomized in a 1:1 ratio to receive placebo for 12 weeks followed by HARVONI + ribavirin for 12 weeks or HARVONI for 24 weeks. Randomization was stratified by HCV genotype (1a vs 1b) and response to prior HCV therapy (never achieved HCV RNA less than LLOQ vs achieved HCV RNA less than LLOQ).
Demographics and baseline characteristics were balanced across the treatment groups. Of the 155 randomized subjects, the median age was 56 years (range: 23 to 77); 74% of the subjects were male; 97% were White; mean body mass index was 27 kg/m2 (range: 19 to 47 kg/m2); 63% had genotype 1a HCV infection; 94% had non-C/C IL28B alleles (CT or TT). One subject discontinued therapy while on placebo, and was not included in the efficacy analysis.
The SVR12 was 96% (74/77) and 97% (75/77) in subjects treated with HARVONI + ribavirin for 12 weeks and HARVONI for 24 weeks without ribavirin, respectively. All 5 subjects who did not achieve SVR12 relapsed.
Clinical Trials in Subjects with Genotype 4, 5, or 6 HCV
Below are trial descriptions, SVR12 and relapse data in the genotype 4, 5, and 6 HCV populations. Trial results in the genotype 4, 5, and 6 HCV populations are based upon limited number of subjects in some subgroups, particularly in subjects who have been previously-treated and subjects with cirrhosis.
Genotype 4
In two open-label studies (Study 1119 and ION-4), HARVONI was administered for 12 weeks to treatment-naïve and previously-treated adult subjects with genotype 4 HCV infection. Study 1119 enrolled 44 treatment-naïve or previously-treated subjects with genotype 4 HCV, with or without cirrhosis. ION-4 enrolled 4 treatment-naïve and 4 previously-treated subjects with genotype 4 HCV infection who were coinfected with HIV-1, none of whom had cirrhosis.
In Study 1119, the overall SVR12 rate was 93% (41/44). SVR12 was similar based upon prior HCV treatment history and cirrhosis status. In ION-4, all 8 subjects achieved SVR12.
Genotype 5
In the open-label 1119 trial, HARVONI was administered for 12 weeks to 41 treatment-naïve or previously-treated adult subjects with genotype 5 HCV infection, with or without cirrhosis. The overall SVR12 was 93% (38/41). SVR12 was similar based upon prior HCV treatment history and cirrhosis status.
Genotype 6
In the open-label ELECTRON-2 trial, HARVONI was administered for 12 weeks to 25 treatment-naïve or previously-treated adult subjects with genotype 6 HCV infection, with or without cirrhosis. The overall SVR12 was 96% (24/25). SVR12 was similar based upon prior HCV treatment history and cirrhosis status. The single subject who relapsed discontinued study treatment early (at approximately Week 8).
Clinical Trials in Subjects Coinfected with HCV and HIV-1
ION-4 was an open-label clinical trial that evaluated the safety and efficacy of 12 weeks of treatment with HARVONI without ribavirin in HCV treatment-naïve and previously-treated adult subjects with genotype 1 or 4 HCV infection who were coinfected with HIV-1. Treatment-experienced subjects had failed prior treatment with Peg-IFN + RBV, Peg-IFN + RBV + an HCV protease inhibitor or sofosbuvir + RBV. Subjects were on a stable HIV-1 antiretroviral therapy that included emtricitabine + tenofovir disoproxil fumarate, administered with efavirenz, rilpivirine, or raltegravir.
Of the 335 treated subjects, the median age was 52 years (range: 26 to 72); 82% of the subjects were male; 61% were White; 34% were Black; mean body mass index was 27 kg/m2 (range: 18 to 66 kg/m2); 75% had genotype 1a HCV infection; 2% had genotype 4 infection; 76% had non-C/C IL28B alleles (CT or TT); and 20% had compensated cirrhosis. Fifty-five percent (55%) of the subjects were treatment-experienced.
Table 17 presents the SVR12 in the ION-4 trial after 12 weeks of HARVONI treatment.
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SVR12 rates were 94% (63/67) in subjects with cirrhosis and 98% (46/47) in subjects who were previously-treated and had cirrhosis. The relapse rate in the ION-4 trial in Black subjects was 9% (10/115), all of whom were IL28B non-CC genotype, and none in non-Black subjects (0/220). In the ION-1, ION-2, and ION-3 HCV mono-infection studies, relapse rates were 3% (10/305) in Black subjects and 2% (26/1637) in non-Black subjects.
No subject had HIV-1 rebound during the study. The percentage of CD4+ cells did not change during treatment. Median CD4+ cell count increase of 29 cells/mm3 was observed at the end of treatment with HARVONI for 12 weeks.
Clinical Trials in Liver Transplant Recipients and/or Subjects with Decompensated Cirrhosis
SOLAR-1 and SOLAR-2 were two open-label trials that evaluated 12 and 24 weeks of treatment with HARVONI in combination with ribavirin in HCV treatment-naïve and previously-treated adult subjects with genotype 1 and 4 infection who had undergone liver transplantation and/or who had decompensated liver disease. The two trials were identical in study design. Subjects were enrolled in one of the seven groups in the trials based on liver transplantation status and severity of hepatic impairment (see TABLE 16). Subjects with a CPT score greater than 12 were excluded. Within each group, subjects were randomized in a 1:1 ratio to receive HARVONI + RBV for 12 weeks or HARVONI + RBV for 24 weeks. For subjects with decompensated cirrhosis in SOLAR-1 and SOLAR-2 studies, the starting RBV dosage was 600 mg per day regardless of transplantation status. RBV dose adjustments were performed according to the RBV labeling.
Demographics and baseline characteristics were balanced across the treatment groups. Of the 670 treated subjects, the median age was 59 years (range: 21 to 81); 77% of the subjects were male; 91% were White; mean body mass index was 28 kg/m2 (range: 18 to 49 kg/m2); 94% and 6% had genotype 1 and 4 HCV infection, respectively; 78% of the subjects failed a prior HCV therapy.
Table 18 presents the pooled SVR12 rates for SOLAR-1 and SOLAR-2 in subjects with genotype 1 HCV treated with HARVONI + RBV for 12 weeks. The SVR12 rates observed with 24 weeks of HARVONI + RBV were similar to the SVR12 rates observed with 12 weeks of treatment. Therefore, the results for the HARVONI + RBV 24 weeks arm are not presented in Table 18.
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There were 7 subjects with fibrosing cholestatic hepatitis in the 12 week treatment arm, and all subjects achieved SVR12.
In genotype 4 HCV post-transplant subjects without cirrhosis or with compensated cirrhosis treated with HARVONI + RBV for 12 weeks (N=12), the SVR12 rate was similar to rates reported with genotype 1; no subjects relapsed. Available data in subjects with genotype 4 HCV who had decompensated cirrhosis (pre- and post-liver transplantation) were insufficient for dosing recommendations; therefore, these results are not presented.
Clinical Trial in Pediatric Subjects
The efficacy of HARVONI was evaluated in an open-label trial (Study 1116) that evaluated 12 weeks of treatment with HARVONI once daily in genotype 1 HCV treatment-naïve (N=80) and treatment-experienced (N=20) pediatric subjects 12 years of age and older without cirrhosis or with compensated cirrhosis.
Demographics and baseline characteristics were balanced across treatment-naïve and treatment-experienced subjects (patients had failed an interferon based regimen with or without ribavirin). Of the 100 treated subjects, the median age was 15 years (range: 12 to 17); 63% of the subjects were female; 90% were White, 7% were Black, and 2% were Asian; 13% were Hispanic/Latino; mean body mass index was 23 kg/m2 (range: 13.1 to 36.6 kg/m2); mean weight was 61 kg (range 33 to 126 kg); 55% had baseline HCV RNA levels greater than or equal to 800,000 IU/mL; 81% had genotype 1a HCV infection; 76% had non-CC IL28B alleles (CT or TT). One subject had known compensated cirrhosis. The majority of subjects (84%) had been infected through vertical transmission.
The SVR12 rate was 98% overall (98% [78/80] in treatment-naïve subjects and 100% [20/20] in treatment-experienced subjects). No subject experienced on-treatment virologic failure or relapse. Two subjects were lost to follow-up.
How Supplied
HARVONI tablets are orange, diamond-shaped, film-coated, debossed with "GSI" on one side and "7985" on the other side of the tablet. Each bottle contains 28 tablets (NDC 61958-1801-1), a silica gel desiccant, polyester coil, and is closed with a child-resistant closure.
Storage
Store at room temperature below 30 °C (86 °F).
Dispense only in original container.
Do not use if seal over bottle opening is broken or missing.
Images
Drug Images
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Package and Label Display Panel
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Risk of Hepatitis B Virus Reactivation in Patients Coinfected with HCV and HBV
Inform patients that HBV reactivation can occur in patients coinfected with HBV during or after treatment of HCV infection. Advise patients to tell their healthcare provider if they have a history of HBV infection.
Serious Symptomatic Bradycardia When Coadministered with Amiodarone
Advise patients to seek medical evaluation immediately for symptoms of bradycardia such as near-fainting or fainting, dizziness or lightheadedness, malaise, weakness, excessive tiredness, shortness of breath, chest pain, confusion or memory problems.
Drug Interactions
Inform patients that HARVONI may interact with other drugs. Advise patients to report to their healthcare provider the use of any other prescription or nonprescription medication or herbal products including St. John's wort.
Pregnancy
Advise patients to avoid pregnancy during combination treatment with HARVONI and ribavirin and for 6 months after completion of treatment. Inform patients to notify their healthcare provider immediately in the event of a pregnancy.
Administration
Advise patients to take HARVONI every day at the regularly scheduled time with or without food. Inform patients that it is important not to miss or skip doses and to take HARVONI for the duration that is recommended by the physician.
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Precautions with Alcohol
Alcohol-Ledipasvir / sofosbuvir interaction has not been established. Talk to your doctor regarding the effects of taking alcohol with this medication.
Brand Names
Harvoni
Look-Alike Drug Names
There is limited information regarding Ledipasvir / sofosbuvir Look-Alike Drug Names in the drug label.
