CẢNH BÁO VÀ THẬN TRỌNG.Daclavirdin không phải được quản lý như là monotherapy.Daclavirdin must be administered in combination with other medicinal products for the treatment of chronic Hcv infection. General : the safety and efficacy of the combination of Daclatasvir and sofobuvir have been evaluated in a limited number of patients with cirrhosis in clinical studies . Further clinical studies with the combination are ongoing . Severe bradycardia and heart block: Cases of severe bradycardia and heart block have been observed when Daclatasvir is used in combination with sofosbuvir and concomitant amiodarone with or without other drugs that lower heart rate. The mechanism is not established. the concomitant use of amiodarone was limited through the clinical development of sofobuvir plus direct-acting antivirals( DAAs). Cases are potentially life threatening, therefore amiodarone should only be used in patients on Daclatasvir and sofosbuvir when other altermative antiarrhythmic treatments are not tolerated or are contraindicated. Should concomitant use of amiodarone be considered necessary it is recommended that patients are closely monitored when initiating Daclatasvir in combination with sofosbuvir. Patients who are identified as being at high risk of bradyarrhythmia should be continuously monitored for 48 hours in an appropriate clinical setting. Fue to the long half-life of amiodarone, appropriate monitoring should also be carried out for patients who have discontinued amiodarone within the past few months and are to be initiated on Daclatasvir in combination with sofosbuvir.All patients receiving Daclatasvir and sofosbuvir in combination with amiodarone with or without other drugs that lower heart rate should also be warmed of the symptoms of bradycardia and heart block and should be advised to seek medical advice urgently should they experience them. Genotype-specific activity: Data to support the treament of genotype 2 infection with Daclatasvir and sofosbuvir are limited .Data from clinical trial support a 12-week treatment duration of Daclatasvir+ sofosbuvir for treatment-naive and -experienced patients with genotype 3 infection without cirrhosis. Lower rates os SVR were observed for patients with cirrhosis. Data from compassionate use programmes which included patients with genotype 3 infection and cirrhosis, support the use of Daclatasvir+ sofosbuvir for 24 weeks in these patients. The relevance of adding ribavirin to that regimen is unclear. The clinical data to support the use of Daclatasvir and sofosbuvir in patients infected with HCV genotypes 4 and 6 are limited. There are no clinical data in patients with genotype 5. Patients with Child-Pugh C liver disease: The safety and effically of Daclatasvir in the treatment of HCV infection in patients with Child-Pugh C liver disease have been established in the clinical trial,(Daclatasvir+ sofosbuvir+ ribavirin for 12 weeks); however, SVR rates were lower than in patients with Child-Pugh A and B
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