(Description regarding monitoring, from ''Warnings'' section)
(Description regarding monitoring, from ''Warnings'' section)
|overdose====Acute Overdose===
|overdose=*No specific antidote is available for overdose with EPCLUSA. If overdose occurs the patient must be monitored for evidence of toxicity. Treatment of overdose with EPCLUSA consists of general supportive measures including monitoring of vital signs as well as observation of the clinical status of the patient. Hemodialysis can efficiently remove the predominant circulating metabolite of sofosbuvir, GS-331007, with an extraction ratio of 53%. Hemodialysis is unlikely to result in significant removal of velpatasvir since velpatasvir is highly bound to plasma protein.
| excretion = Feces (94%), urine (0.4%)<ref name="PrescribingInfo">{{cite web|title=Epclusa (sofosbuvir and velpatasvir) Tablets, for Oral Use. Full Prescribing Information|url=http://www.gilead.com/~/media/files/pdfs/medicines/liver-disease/epclusa/epclusa_pi.pdf?|publisher=Gilead Sciences, Inc. Foster City, CA 94404|accessdate=1 August 2016}}</ref>
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Black Box Warning
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Overview
Sofosbuvir / velpatasvir 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..
Adult Indications and Dosage
FDA-Labeled Indications and Dosage (Adult)
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Off-Label Use and Dosage (Adult)
Guideline-Supported Use
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Non–Guideline-Supported Use
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Pediatric Indications and Dosage
FDA-Labeled Indications and Dosage (Pediatric)
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Off-Label Use and Dosage (Pediatric)
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Contraindications
CONTRAINDICATIONS
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Conidition 1
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Conidition 2
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Conidition 3
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Adverse Reactions
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Postmarketing Experience
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Drug Interactions
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Drug 5
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Use in Specific Populations
Pregnancy
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(Description)
Pregnancy Category (AUS):
There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Sofosbuvir / velpatasvir in women who are pregnant.
Labor and Delivery
(Description)
Nursing Mothers
(Description)g
Pediatric Use
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Geriatic Use
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Gender
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Race
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Renal Impairment
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Hepatic Impairment
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Females of Reproductive Potential and Males
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Immunocompromised Patients
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Others
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Administration and Monitoring
Administration
(Oral/Intravenous/etc)
Monitoring
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(Description regarding monitoring, from Warnings section)
Condition 2
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Condition 3
(Description regarding monitoring, from Warnings section)
IV Compatibility
There is limited information regarding the compatibility of Sofosbuvir / velpatasvir and IV administrations.
Overdosage
No specific antidote is available for overdose with EPCLUSA. If overdose occurs the patient must be monitored for evidence of toxicity. Treatment of overdose with EPCLUSA consists of general supportive measures including monitoring of vital signs as well as observation of the clinical status of the patient. Hemodialysis can efficiently remove the predominant circulating metabolite of sofosbuvir, GS-331007, with an extraction ratio of 53%. Hemodialysis is unlikely to result in significant removal of velpatasvir since velpatasvir is highly bound to plasma protein.
EPCLUSA is a fixed-dose combination of sofosbuvir and velpatasvir which are directacting antiviral agents against the hepatitis C virus.
Structure
This image is provided by the National Library of Medicine.This image is provided by the National Library of Medicine.
Pharmacodynamics
Cardiac Electrophysiology
The effect of sofosbuvir 400 mg (recommended dosage) and 1200 mg (3 times the recommended dosage) on QTc interval was evaluated in an active-controlled (moxifloxacin 400 mg) thorough QT trial. At a dose 3 times the recommended dose, sofosbuvir does not prolong QTc to any clinically relevant extent.
The effect of velpatasvir 500 mg (5 times the recommended dosage) was evaluated in an active-controlled (moxifloxacin 400 mg) thorough QT trial. At a dose 5 times the recommended dose, velpatasvir does not prolong QTc interval to any clinically relevant extent.
Pharmacokinetics
The pharmacokinetic properties of the components of EPCLUSA are provided in Table 3. The multiple dose pharmacokinetic parameters of sofosbuvir and its metabolite, GS-331007, and velpatasvir are provided in Table 4.
Sofosbuvir and GS-331007 AUC0-24 and Cmax were similar in healthy adult subjects and subjects with HCV infection. Relative to healthy subjects (N=331), velpatasvir AUC0-24 and Cmax were 37% lower and 42% lower, respectively, in HCV-infected subjects.
Velpatasvir AUC increases in a greater than proportional manner from 5 to 50 mg and in a less than proportional manner from 50 to 450 mg in healthy volunteers. However, velpatasvir exhibited more than or near dose-proportional increase in exposures 25 mg to 150 mg in HCV-infected patients when coadministered with sofosbuvir. Sofosbuvir and GS-331007 AUCs are near dose-proportional over the dose range of 200 mg to 1200 mg.
Specific Populations
Pediatric Patients: The pharmacokinetics of sofosbuvir or velpatasvir in pediatric patients has not been established.
Geriatric Patients: Population pharmacokinetic analysis in HCV-infected subjects showed that within the age range (18 to 82 years) analyzed, age did not have a clinically relevant effect on the exposure to sofosbuvir, GS-331007, or velpatasvir.
Patients with 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 subjects with 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.
The pharmacokinetics of velpatasvir were studied with a single dose of 100 mg velpatasvir in HCV negative subjects with severe renal impairment (eGFR less than 30 mL/min by Cockcroft-Gault). No clinically relevant differences in velpatasvir pharmacokinetics were observed between healthy subjects and subjects with severe renal impairment.
Patients with Hepatic Impairment: 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, respectively). 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.
The pharmacokinetics of velpatasvir were studied with a single dose of 100 mg velpatasvir in HCV negative subjects with moderate and severe hepatic impairment (Child-Pugh Class B and C). Velpatasvir plasma exposure (AUCinf) was similar in subjects with moderate hepatic impairment, severe hepatic impairment, and control subjects with normal hepatic function. Population pharmacokinetics analysis in HCVinfected subjects indicated that cirrhosis (including decompensated cirrhosis) had no clinically relevant effect on the exposure of velpatasvir.
Race: Population pharmacokinetics analysis in HCV-infected subjects indicated that race had no clinically relevant effect on the exposure of sofosbuvir, GS-331007, or velpatasvir.
Gender: Population pharmacokinetics analysis in HCV-infected subjects indicated that gender had no clinically relevant effect on the exposure of sofosbuvir, GS-331007, or velpatasvir.
Drug Interaction Studies
After oral administration of EPCLUSA, sofosbuvir is rapidly absorbed and subject to extensive first-pass hepatic extraction (hydrolysis followed by sequential phosphorylation) to form the pharmacologically active triphosphate. In clinical pharmacology studies, both sofosbuvir and the primary circulating metabolite GS-331007 (dephosphorylated nucleotide metabolite) were monitored for purposes of pharmacokinetic analyses.
Sofosbuvir and velpatasvir are substrates of drug transporters P-gp and BCRP while GS-331007 is not. Velpatasvir is also transported by OATP1B1 and OATP1B3. In vitro, slow metabolic turnover of velpatasvir by CYP2B6, CYP2C8, and CYP3A4 was observed. Inducers of P-gp and/or moderate to potent inducers of CYP2B6, CYP2C8, or CYP3A4 (e.g., rifampin, St. John’s wort, carbamazepine) may decrease plasma concentrations of sofosbuvir and/or velpatasvir, leading to reduced therapeutic effect of EPCLUSA. Coadministration with drugs that inhibit P-gp and/or BCRP may increase sofosbuvir and/or velpatasvir plasma concentrations without increasing GS-331007 plasma concentration. Drugs that inhibit CYP2B6, CYP2C8, or CYP3A4 may increase plasma concentration of velpatasvir.
Velpatasvir is an inhibitor of drug transporter P-gp, BCRP, OATP1B1, OATP1B3, and OATP2B1, and its involvement in drug interactions with these transporters is primarily limited to the process of absorption. At clinically relevant concentration, velpatasvir is not an inhibitor of hepatic transporters OATP1A2 or OCT1, renal transporters OCT2, OAT1, OAT3 or MATE1, or CYP or UGT1A1 enzymes.
Sofosbuvir and GS-331007 are not inhibitors of drug transporters P-gp, BCRP, OATP1B1, OATP1B3, and OCT1 and GS-331007 is not an inhibitor of OAT1, OAT3, OCT2, and MATE1. Sofosbuvir and GS-331007 are not inhibitors or inducers of CYP or UGT1A1 enzymes.
The effects of coadministered drugs on the exposure of sofosbuvir, GS-331007, and velpatasvir are shown in Table 5. The effects of sofosbuvir, velpatasvir, or EPCLUSA on the exposure of coadministered drugs are shown in Table 6.
No effect on the pharmacokinetic parameters of sofosbuvir, GS-331007, or velpatasvir was observed with dolutegravir; the combination of emtricitabine, rilpivirine, and tenofovir DF; emtricitabine; raltegravir; or tenofovir DF.
No effect on the pharmacokinetic parameters of the following coadministered drugs was observed with EPCLUSA (dolutegravir or lopinavir/ritonavir) or its components sofosbuvir (cyclosporine or methadone) or velpatasvir (cyclosporine).
Nonclinical Toxicology
Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenesis and Mutagenesis
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 3 and 15 times (in mice) and 7 and 9 times (in rats), in males and females, respectively, the exposure in humans at the recommended human dose (RHD).
Velpatasvir: Velpatasvir 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.
Velpatasvir was not carcinogenic in a 6-month rasH2 transgenic mouse study (up to 1000 mg/kg/day). A 2-year rat carcinogenicity study with velpatasvir is ongoing.
Impairment of Fertility
Sofosbuvir: Sofosbuvir had no effects on embryo-fetal viability or on fertility when evaluated in rats. At the highest dose tested, AUC exposure to the predominant circulating metabolite GS-331007 was approximately 4 times the exposure in humans at the RHD.
Velpatasvir: Velpatasvir had no effects on embryo-fetal viability or on fertility when evaluated in rats. At the highest dose tested, velpatasvir exposure was approximately 6 times the exposure in humans at the RHD.
Clinical Studies
Description of Clinical Trials
Table 9 presents the clinical trial design including different treatment groups that were conducted with EPCLUSA with and without ribavirin in subjects with chronic hepatitis C (HCV) genotype 1, 2, 3, 4, 5, and 6 infection. For detailed description of trial design and recommended regimen and duration.
The ribavirin dosage was weight-based (1000 mg daily administered in two divided doses for subjects less than 75 kg and 1200 mg for those greater than or equal to 75 kg) and administered in two divided doses when used in combination with sofosbuvir in the ASTRAL-2 and ASTRAL-3 trials or in combination with EPCLUSA in the ASTRAL-4 trial. Ribavirin dosage adjustments were performed according to the ribavirin prescribing information. Serum HCV RNA values were measured during the clinical trials using the COBAS AmpliPrep/COBAS Taqman HCV test (version 2.0) with a lower limit of quantification (LLOQ) of 15 IU/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 all the trials. Relapse is defined as HCV RNA greater than or equal to LLOQ during the post treatment period after having achieved HCV RNA less than LLOQ at the end of treatment. On-treatment virologic failure is defined as breakthrough, rebound, or non-response.
Clinical Trials in Subjects without Cirrhosis and Subjects with Compensated Cirrhosis
ASTRAL-1 was a randomized, double-blind, placebo-controlled trial that evaluated 12 weeks of treatment with EPCLUSA compared with 12 weeks of placebo in subjects with genotype 1, 2, 4, 5, or 6 HCV infection without cirrhosis or with compensated cirrhosis. Subjects with genotype 1, 2, 4, or 6 HCV infection were randomized in a 5:1 ratio to treatment with EPCLUSA or placebo for 12 weeks. Subjects with genotype 5 HCV infection were enrolled to the EPCLUSA group. Randomization was stratified by HCV genotype (1, 2, 4, 6, and indeterminate) and the presence or absence of compensated cirrhosis.
Demographics and baseline characteristics were balanced between the EPCLUSA and placebo group. Of the 740 treated subjects, the median age was 56 years (range: 18 to 82); 60% of the subjects were male; 79% were White, 9% were Black; 21% had a baseline body mass index at least 30 kg/m2 ; the proportions of subjects with genotype
1, 2, 4, 5, or 6 HCV infection were 53%, 17%, 19%, 5%, and 7%, respectively; 69% had non-CC IL28B alleles (CT or TT); 74% had baseline HCV RNA levels at least 800,000 IU/mL; 19% had compensated cirrhosis; and 32% were treatment-experienced.
Table 10 presents SVR12 and other virologic outcomes in EPCLUSA-treated subjects in the ASTRAL-1 trial by HCV genotype. No subjects in the placebo group achieved SVR12.
ASTRAL-2 was a randomized, open-label trial that evaluated 12 weeks of treatment with EPCLUSA compared with 12 weeks of treatment with SOF with ribavirin in subjects with genotype 2 HCV infection. Subjects were randomized in a 1:1 ratio to the treatment groups. Randomization was stratified by the presence or absence of compensated cirrhosis and prior treatment experience (treatment-naïve vs treatment-experienced).
Demographics and baseline characteristics were balanced across the two treatment groups. Of the 266 treated subjects, the median age was 58 years (range: 23 to 81); 59% of the subjects were male; 88% were White; 7% were Black; 33% had a baseline body mass index at least 30 kg/m2 ; 62% had non-CC IL28B alleles (CT or TT); 80% had baseline HCV RNA levels at least 800,000 IU/mL; 14% had compensated cirrhosis; and 15% were treatment-experienced.
Table 11 presents SVR12 and other virologic outcomes from the ASTRAL-2 trial.
ASTRAL-3 was a randomized, open-label trial that evaluated 12 weeks of treatment with EPCLUSA compared with 24 weeks of treatment with SOF with ribavirin in subjects with genotype 3 HCV infection. Subjects were randomized in a 1:1 ratio to the treatment groups. Randomization was stratified by the presence or absence of compensated cirrhosis and prior treatment experience (treatment-naïve vs treatment-experienced).
Demographics and baseline characteristics were balanced across the treatment groups. Of the 552 treated subjects, the median age was 52 years (range: 19 to 76); 62% of the subjects were male; 89% were White; 9% were Asian; 20% had a baseline body mass index at least 30 kg/m2 ; 61% had non-CC IL28B alleles (CT or TT); 70% had baseline HCV RNA levels at least 800,000 IU/mL; 30% had compensated cirrhosis; and 26% were treatment-experienced.
Table 12 presents SVR12 and other virologic outcomes from the ASTRAL-3 trial.
Clinical Trial in Subjects Coinfected with HCV and HIV-1
ASTRAL-5 was an open-label trial that evaluated 12 weeks of treatment with EPCLUSA in subjects with genotype 1, 2, 3, 4, 5 or 6 HCV infection who were coinfected with HIV1. Subjects were on a stable HIV-1 antiretroviral therapy that included emtricitabine/tenofovir disoproxil fumarate or abacavir/lamivudine administered with atazanavir/ritonavir, darunavir/ritonavir, lopinavir/ritonavir, rilpivirine, raltegravir or elvitegravir/cobicistat.
Of the 106 treated subjects, the median age was 57 years (range: 25 to 72); 86% of the subjects were male; 51% were White; 45% were Black; 22% had a baseline body mass
index at least 30 kg/m2 ; the proportions of patients with genotype 1, 2, 3, or 4 HCV infection were 74%; 10%; 11%, and 5% respectively; no subjects with genotype 5 or 6 HCV were treated with EPCLUSA; 77% had non- CC IL28B alleles (CT or TT); 74% had baseline HCV RNA levels of at least 800,000 IU/mL; 18% had compensated cirrhosis; and 29% were treatment experienced. The overall mean CD4+ count was 598 cells/µL (range: 183−1513 cells/µL) and 57% of subjects had CD4+ counts > 500 cells/μL.
Table 14 presents the SVR12 for the ASTRAL-5 trial by HCV genotype.
No subject had HIV-1 rebound during treatment and CD4+ counts were stable during treatment.
Clinical Trials in Subjects with Decompensated Cirrhosis
ASTRAL-4 was a randomized, open-label trial in subjects with genotype 1, 2, 3, 4, 5, or 6 HCV infection and Child-Pugh B cirrhosis at screening. Subjects were randomized in a 1:1:1 ratio to treatment with EPCLUSA for 12 weeks (N=90), EPCLUSA with ribavirin for 12 weeks (N=87), or EPCLUSA for 24 weeks (N=90). Randomization was stratified by HCV genotype (1, 2, 3, 4, 5, 6, and indeterminate).
Demographics and baseline characteristics were balanced across the treatment groups. Of the 267 treated subjects, the median age was 59 years (range: 40 to 73); 70% of the subjects were male; 90% were White, 6% were Black; 42% had a baseline body mass index at least 30 kg/m2. The proportions of subjects with genotype 1, 2, 3, 4, or 6 HCV were 78%, 4%, 15%, 3%, and less than 1% (1 subject), respectively. No subjects with genotype 5 HCV infection were enrolled. 76% had non-CC IL28B alleles (CT or TT); 56% had baseline HCV RNA levels at least 800,000 IU/mL; 55% were treatmentexperienced; and 95% of subjects had Model for End Stage Liver Disease (MELD) score less than or equal to 15 at baseline. Although all subjects had Child-Pugh B cirrhosis at screening, 6% and 4% of subjects were assessed to have Child-Pugh A and Child-Pugh C cirrhosis, respectively, on the first day of treatment.
Treatment with EPCLUSA with ribavirin for 12 weeks resulted in numerically higher SVR12 rates than treatment with EPCLUSA for 12 weeks or 24 weeks. Because EPCLUSA with ribavirin for 12 weeks is the recommended dosage regimen, the results of the 12- and 24-week EPCLUSA treatment groups are not presented.
Table 15 presents the SVR12 for subjects treated with EPCLUSA with ribavirin for 12 weeks in the ASTRAL-4 trial by HCV genotype. No subjects with genotype 5 or 6 HCV were treated with EPCLUSA with ribavirin for 12 weeks.
All subjects with genotype 2 (N=4) and genotype 4 (N=2) HCV infection treated with EPCLUSA and ribavirin achieved SVR12.
How Supplied
Each EPCLUSA tablet contains 400 mg of sofosbuvir and 100 mg of velpatasvir, is pink, diamond-shaped, film-coated, debossed with “GSI” on one side and “7916” on the other. Each bottle contains 28 tablets (NDC 61958-2201-1), polyester coil, and is closed with a child-resistant closure.
Storage
Store below 30 °C (86 ºF). Dispense only in original container.
Images
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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 EPCLUSA 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.
Administration
Advise patients to take EPCLUSA once daily on a regular dosing schedule with or without food. Inform patients that it is important not to miss or skip doses and to take EPCLUSA for the duration that is recommended by the physician.
Pregnancy
Advise patients to avoid pregnancy during combination treatment with EPCLUSA and ribavirin and for 6 months after completion of treatment. Inform patients to notify their healthcare provider immediately in the event of a pregnancy.
Alcohol-Sofosbuvir / velpatasvir interaction has not been established. Talk to your doctor regarding the effects of taking alcohol with this medication.
Brand Names
Epclusa
Look-Alike Drug Names
There is limited information regarding Sofosbuvir / velpatasvir Look-Alike Drug Names in the drug label.
