Medical Editor: John P. Cunha, DO, FACOEP
What Is Victrelis?
Victrelis (boceprevir) is a protease inhibitor indicated for the treatment of chronic hepatitis C. Victrelis must not be used as a single therapy and should only be used in combination with peginterferon alfa and ribavirin in adult patients with liver disease.
What Are Side Effects of Victrelis?
Common side effects of Victrelis include:
- tired feeling,
- headache, and
- changes in taste.
Serious side effects of Victrelis include:
Dosage for Victrelis
Victrelis is available in 200 mg capsules. The dose of Victrelis is 800 mg (four 200-mg capsules) three times daily (every 7-9 hours) with a meal or light snack (use only in combination with perinterferon alfa and ribavirin (see other Side Effects Drug Center information sites for use of these drugs); dosages may vary based on the patient's condition.
What Drugs, Substances, or Supplements Interact with Victrelis?
Victrelis During Pregnancy and Breastfeeding
Ribavirin (to be used in combination) with Victrelis may cause birth defects and/or death of the exposed fetus and should not be used by women who are pregnant or by men whose female partners are pregnant. It is not known whether Victrelis is excreted into human breast milk. For nursing mothers, a decision must be made whether to discontinue breastfeeding or discontinue treatment with Victrelis, taking into account the importance of the therapy to the mother. Pregnancy should not be attempted until 6 months after Victrelis has been stopped. Victrelis has not been studied in children.
Our Victrelis Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See the peginterferon alfa and ribavirin prescribing information for description of adverse reactions associated with their use.
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in clinical trials of VICTRELIS cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
The following serious and otherwise important adverse drug reactions (ADRs) are discussed in detail in another section of the labeling:
- Anemia [see WARNINGS AND PRECAUTIONS]
- Neutropenia [see WARNINGS AND PRECAUTIONS]
- Pancytopenia [see WARNINGS AND PRECAUTIONS]
- Hypersensitivity [see CONTRAINDICATIONS and WARNINGS AND PRECAUTIONS]
The most commonly reported adverse reactions (more than 35% of subjects regardless of investigator's causality assessment) in adult subjects were fatigue, anemia, nausea, headache, and dysgeusia when VICTRELIS was used in combination with PegIntron and REBETOL.
The safety of the combination of VICTRELIS 800 mg three times daily with PegIntron/REBETOL was assessed in 2095 subjects with chronic hepatitis C in one Phase 2, open-label trial and two Phase 3, randomized, double-blind, placebo-controlled clinical trials. SPRINT-1 (subjects who were previously untreated) evaluated the use of VICTRELIS in combination with PegIntron/REBETOL with or without a four-week lead-in period with PegIntron/REBETOL compared to PegIntron/REBETOL alone. SPRINT-2 (subjects who were previously untreated) and RESPOND-2 (subjects who had failed previous therapy) evaluated the use of VICTRELIS 800 mg three times daily in combination with PegIntron/REBETOL with a four-week lead-in period with PegIntron/REBETOL compared to PegIntron/REBETOL alone [see Clinical Studies]. The population studied had a mean age of 49 years (3% of subjects were older than 65 years of age), 39% were female, 82% were white and 15% were black.
During the four week lead-in period with PegIntron/REBETOL in subjects treated with the combination of VICTRELIS with PegIntron/REBETOL, 28/1263 (2%) subjects experienced adverse reactions leading to discontinuation of treatment. During the entire course of treatment, the proportion of subjects who discontinued treatment due to adverse reactions was 13% for subjects receiving the combination of VICTRELIS with PegIntron/REBETOL and 12% for subjects receiving PegIntron/REBETOL alone. Events resulting in discontinuation were similar to those seen in previous studies with PegIntron/REBETOL. Only anemia and fatigue were reported as events that led to discontinuation in more than 1% of subjects in any arm.
Adverse reactions that led to dose modifications of any drug (primarily PegIntron and REBETOL) occurred in 39% of subjects receiving the combination of VICTRELIS with PegIntron/REBETOL compared to 24% of subjects receiving PegIntron/REBETOL alone. The most common reason for dose reduction was anemia, which occurred more frequently in subjects receiving the combination of VICTRELIS with PegIntron/REBETOL than in subjects receiving PegIntron/REBETOL alone.
Serious adverse events were reported in 11% of subjects receiving the combination of VICTRELIS with PegIntron/REBETOL and in 8% of subjects receiving PegIntron/REBETOL.
Adverse events (regardless of investigator's causality assessment) reported in greater than or equal to 10% of subjects receiving the combination of VICTRELIS with PegIntron/REBETOL and reported at a rate of greater than or equal to 5% than PegIntron/REBETOL alone in SPRINT-1, SPRINT-2, and RESPOND2 are presented in Table 3.
Adverse Events Reported in ≥10% of Subjects Receiving the Combination of VICTRELIS with PegIntron/REBETOL and Reported at a Rate of ≥5% than PegIntron/REBETOL alone
|Adverse Events||Previously Untreated
(SPRINT-1 and SPRINT-2)
|Previous Treatment Failures
|Percentage of Subjects Reporting Adverse Events||Percentage of Subjects Reporting Adverse Events|
|Body System Organ Class||VICTRELIS + PegIntron +REBETOL
|PegIntron + REBETOL
|VICTRELIS + PegIntron +REBETOL
|PegIntron + REBETOL
|Median Exposure (days)||197||216||253||104|
|Blood and Lymphatic System Disorders|
|General Disorders and Administration Site Conditions|
|Metabolism and Nutrition Disorders|
|Musculoskeletal and Connective Tissue Disorders|
|Nervous System Disorders|
|Respiratory, Thoracic, and Mediastinal Disorders|
|Skin and Subcutaneous Tissue Disorders|
Other Important Adverse Reactions Reported In Clinical Trials
Among subjects (previously untreated subjects or those who failed previous therapy) who received VICTRELIS in combination with peginterferon alfa and ribavirin, the following adverse drug reactions were reported. These events are notable because of their seriousness, severity, or increased frequency in subjects who received VICTRELIS in combination with peginterferon alfa and ribavirin compared with subjects who received only peginterferon alfa and ribavirin.
Dysgeusia (alteration of taste) was an adverse event reported at an increased frequency in subjects receiving VICTRELIS in combination with peginterferon alfa and ribavirin compared with subjects receiving peginterferon alfa and ribavirin alone (Table 3). Adverse events such as dry mouth, nausea, vomiting and diarrhea were also reported at an increased frequency in subjects receiving VICTRELIS in combination with peginterferon alfa and ribavirin.
Changes in selected hematological parameters during treatment of adult subjects with the combination of VICTRELIS with PegIntron and REBETOL are described in Table 4.
Decreases in hemoglobin may require a decrease in dosage or discontinuation of ribavirin [see WARNINGS AND PRECAUTIONS and Clinical Studies] [see prescribing information for ribavirin]. If ribavirin is permanently discontinued, then peginterferon alfa and VICTRELIS must also be discontinued [see DOSAGE AND ADMINISTRATION].
Neutrophils and Platelets
The proportion of subjects with decreased neutrophil and platelet counts was higher in subjects treated with VICTRELIS in combination with PegIntron/REBETOL compared to subjects receiving PegIntron/REBETOL alone. Three percent of subjects receiving the combination of VICTRELIS with PegIntron/REBETOL had platelet counts of less than 50 x 109 per L compared to 1% of subjects receiving PegIntron/REBETOL alone. Decreases in neutrophils or platelets may require a decrease in dosage or interruption of peginterferon alfa, or discontinuation of therapy [see prescribing information or peginterferon alfa and ribavirin]. If peginterferon alfa is permanently discontinued, then ribavirin and VICTRELIS must also be discontinued [see DOSAGE AND ADMINISTRATION].
Selected Hematological Parameters
(SPRINT-1 and SPRINT-2)
|Previous Treatment Failures
|Percentage of Subjects Reporting Selected Hematological Parameters||Percentage of Subjects Reporting Selected Hematological Parameters|
|Hematological Parameters||VICTRELIS + PegIntron + REBETOL
|VICTRELIS + PegIntron + REBETOL
|PegIntron + REBETOL
|Neutrophils (x 109/L)|
|Platelets (x 109/L)|
The following adverse reactions have been identified during post-approval use of VICTRELIS in combination with peginterferon alfa and ribavirin. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Gastrointestinal Disorders: mouth ulceration, stomatitis
Skin and Subcutaneous Tissue Disorders: angioedema, urticaria [see WARNINGS AND PRECAUTIONS]; drug rash with eosinophilia and systemic symptoms (DRESS) syndrome, exfoliative rash, exfoliative dermatitis, Stevens-Johnson syndrome, toxic skin eruption, toxicoderma
Read the entire FDA prescribing information for Victrelis (Boceprevir Capsules)
© Victrelis Patient Information is supplied by Cerner Multum, Inc. and Victrelis Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.