Patients
who are HCV RNA negative at week 24, should receive an additional 24 weeks of PR (T12PR48) in order to achieve an expected SVR ≈ 60%. In patients who fail to reach these intermediate endpoints, all drugs should be discontinued, as further therapy is considered futile. Specifically, these futility rules include (1) HCV RNA > 1000 IU at any time between weeks 4 and 12; (2) HCV RNA detectable at week 24; and (3) check details permanent discontinuation of either pegylated interferon or ribavirin. A scenario not addressed by clinical trial data is the patient who achieves eRVR yet have detectable (but <1000 IU/mL) HCV RNA between weeks 12 and 23. We recommend that these patients receive a total BI 6727 mouse of 48 weeks of PR, provided HCV RNA is undetectable at 24 weeks. In order to assess these treatment milestones and to detect laboratory adverse events, patients must be carefully monitored. Our schedule for clinical visits
and laboratories studies for patients on telaprevir is shown in Supporting Table 2. A highly sensitive real-time HCV RNA assay is recommended, with a low limit of HCV RNA quantification (e.g., ≤25 IU/mL) as well as limit of HCV RNA detection (e.g., 10-15 IU/mL).19 As with the current SOC, it is important to use the same test (and laboratory) each time in monitoring treatment response. Although not germane to the case being considered, we present our algorithm for previously treated patients for the reader’s reference in Supporting Figures 1 and 2. Common side effects in patients receiving telaprevir regimens can be broadly categorized as dermatologic (rash,
selleck 56%; pruritus, 47%), gastrointestinal (nausea, 39%; diarrhea, 26%; vomiting, 13%; dysgeusia, 10%), anorectal (hemorrhoids, 12%; anal discomfort, 11%; anal pruritus, 6%), hematologic (anemia, 36%), and metabolic (increased uric acid, 73%; increased bilirubin, 41%). Clinic visits are vital to monitor for rash and depression, because these potentially life-threatening adverse events can only be addressed in person. Although most clinicians are familiar with side effects of pegylated interferon and ribavirin, two common side effects, namely anemia and rash, are more common when telaprevir is added. The rash experienced with telaprevir may appear eczematoid, is seen most often in first 4 weeks of treatment (median = 25 days), and is reversible with dose discontinuation. In the ADVANCE study, a protocol was developed to grade and manage rashes.6 A grade 1 rash is mild, localized to one or several isolated areas, and without epidermal disruption or mucous membrane involvement. Grade 1 rashes can be monitored, treated with class III topical corticosteroids (clobetasone or triamcinolone) in lotion or cream form for up to 2 weeks in conjunction with antihistamines such as diphenhydramine, hydroxyzine, levocetirizine, or desloratadine for pruritus.