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| {{DrugProjectFormSinglePage
| | #REDIRECT [[Interferon beta-1b]] |
| |genericName=Interferon Beta-1B
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| |aOrAn=an
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| |drugClass=immunologic adjuvant
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| |indicationType=treatment
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| |indication=relapsing forms of [[multiple sclerosis]]
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| |adverseReactions=injection site reaction, [[lymphopenia]], [[flu]]-like symptoms, [[myalgia]], l[[eukopenia]], [[neutropenia]], increased liver enzymes, [[headache]], [[hypertonia]], pain, [[rash]], [[insomnia]], [[abdominal pain]], and [[asthenia]]
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| |blackBoxWarningTitle=<b><span style="color:#FF0000;">TITLE</span></b>
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| |blackBoxWarningBody=<i><span style="color:#FF0000;">Condition Name:</span></i> (Content)
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| |fdaLIADAdult=====Multiple Sclerosis====
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| BETASERON (interferon beta-1b) is indicated for the treatment of relapsing forms of multiple sclerosis to reduce the frequency of clinical exacerbations. Patients with multiple sclerosis in whom efficacy has been demonstrated include patients who have experienced a first clinical episode and have MRI features consistent with multiple sclerosis.
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| * Dosing Information
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| :* The recommended starting dose is 0.0625 mg (0.25 mL) subcutaneously every other day, with dose increases over a six week period to the recommended dose of 0.25 mg (1 mL) every other day
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| |offLabelAdultGuideSupport=There is limited information regarding <i>Off-Label Guideline-Supported Use</i> of Interferon Beta-1B in adult patients.
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| |offLabelAdultNoGuideSupport=There is limited information regarding <i>Off-Label Non–Guideline-Supported Use</i> of Interferon Beta-1B in adult patients.
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| |fdaLIADPed=Safety and efficacy in pediatric patients have not been established.
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| |offLabelPedGuideSupport=There is limited information regarding <i>Off-Label Guideline-Supported Use</i> of Interferon Beta-1B in pediatric patients.
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| |offLabelPedNoGuideSupport=There is limited information regarding <i>Off-Label Non–Guideline-Supported Use</i> of Interferon Beta-1B in pediatric patients.
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| |contraindications=BETASERON is contraindicated in patients with a history of hypersensitivity to natural or recombinant interferon beta, Albumin (Human), or any other component of the formulation.
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| |warnings='''Hepatic Injury'''
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| Severe hepatic injury including cases of hepatic failure, some of which have been due to autoimmune hepatitis, has been rarely reported in patients taking BETASERON. In some cases, these events have occurred in the presence of other drugs or comorbid medical conditions that have been associated with hepatic injury. Consider the potential risk of BETASERON used in combination with known hepatotoxic drugs or other products (eg., alcohol) prior to BETASERON administration, or when adding new agents to the regimen of patients already on BETASERON. Monitor patients for signs and symptoms of hepatic injury. Consider discontinuing BETASERON if serum transaminase levels significantly increase, or if they are associated with clinical symptoms such as jaundice.
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| Asymptomatic elevation of serum transaminases is common in patients treated with BETASERON. In controlled clinical trials, elevations of SGPT to greater than five times baseline value were reported in 12% of patients receiving BETASERON (compared to 4% on placebo), and increases of SGOT to greater than five times baseline value were reported in 4% of patients receiving BETASERON (compared to 1% on placebo), leading to dose-reduction or discontinuation of treatment in some patients. Monitor liver function tests.
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| '''Anaphylaxis and Other Allergic-Reactions'''
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| Anaphylaxis has been reported as a rare complication of BETASERON use. Other allergic reactions have included dyspnea, bronchospasm, tongue edema, skin rash and urticaria. Discontinue BETASERON if anaphylaxis occurs.
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| '''Depression and Suicide'''
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| Depression and suicide have been reported to occur with increased frequency in patients receiving interferon beta products, including BETASERON. Advise patients to report any symptom of depression and/or suicidal ideation to their healthcare provider. If a patient develops depression, discontinuation of BETASERON therapy should be considered.
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| In randomized controlled clinical trials, there were three suicides and eight suicide attempts among the 1532 patients on BETASERON compared to one suicide and four suicide attempts among 965 patients on placebo.
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| '''Congestive Heart Failure'''
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| Monitor patients with pre-existing congestive heart failure (CHF) for worsening of their cardiac condition during initiation of and continued treatment with BETASERON. While beta interferons do not have any known direct-acting cardiac toxicity, cases of CHF, cardiomyopathy, and cardiomyopathy with CHF have been reported in patients without known predisposition to these events, and without other known etiologies being established. In some cases, these events have been temporally related to the administration of BETASERON. Recurrence upon rechallenge was observed in some patients. Consider discontinuation of BETASERON if worsening of CHF occurs with no other etiology.
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| '''Injection Site Necrosis and Reactions'''
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| Injection site necrosis (ISN) was reported in 4% of BETASERON-treated patients in controlled clinical trials (compared to 0% on placebo) [see Adverse Reactions (6.1)]. Typically, ISN occurs within the first four months of therapy, although postmarketing reports have been received of ISN occurring over one year after initiation of therapy. The necrotic lesions are typically 3 cm or less in diameter, but larger areas have been reported. Generally the necrosis has extended only to subcutaneous fat, but has extended to the fascia overlying muscle. In some lesions where biopsy results are available, vasculitis has been reported. For some lesions, debridement, and/or skin grafting have been required. In most cases healing was associated with scarring.
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| Whether to discontinue therapy following a single site of necrosis is dependent on the extent of necrosis. For patients who continue therapy with BETASERON after injection site necrosis has occurred, avoid administration of BETASERON into the affected area until it is fully healed. If multiple lesions occur, discontinue therapy until healing occurs.
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| Periodically evaluate patient understanding and use of aseptic self-injection techniques and procedures, particularly if injection site necrosis has occurred.
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| In controlled clinical trials, injection site reactions occurred in 78% of patients receiving BETASERON with injection site necrosis in 4%. Injection site inflammation (42%), injection site pain (16%), injection site hypersensitivity (4%), injection site necrosis (4%), injection site mass (2%), injection site edema (2%) and nonspecific reactions were significantly associated with BETASERON treatment. The incidence of injection site reactions tended to decrease over time. Approximately 69% of patients experienced injection site reactions during the first three months of treatment, compared to approximately 40% at the end of the studies.
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| '''Leukopenia'''
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| In controlled clinical trials, leukopenia was reported in 18% of patients receiving BETASERON (compared to 6% on placebo), leading to a reduction of the dose of BETASERON in some patients [see Adverse Reactions (6.1)]. Monitoring of complete blood and differential white blood cell counts is recommended. Patients with myelosuppression may require more intensive monitoring of complete blood cell counts, with differential and platelet counts.
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| '''Flu-like Symptom Complex'''
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| In controlled clinical trials, the rate of flu-like symptom complex for patients on BETASERON was 57% [see Adverse Reactions (6.1)]. The incidence decreased over time, with 10% of patients reporting flu-like symptom complex at the end of the studies. The median duration of flu-like symptom complex in Study 1 was 7.5 days [see Clinical Studies (14)]. Analgesics and/or antipyretics on treatment days may help ameliorate flu-like symptoms associated with BETASERON use.
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| '''Seizures'''
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| Seizures have been temporally associated with the use of beta interferons in clinical trials and postmarketing safety surveillance. It is not known whether these events were related to a primary seizure disorder, the effects of multiple sclerosis alone, the use of beta interferons, other potential precipitants of seizures (eg., fever), or to some combination of these.
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| '''Monitoring for Laboratory Abnormalities'''
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| In addition to those laboratory tests normally required for monitoring patients with multiple sclerosis, complete blood and differential white blood cell counts, platelet counts and blood chemistries, including liver function tests, are recommended at regular intervals (one, three, and six months) following introduction of BETASERON therapy, and then periodically thereafter in the absence of clinical symptoms.
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| |clinicalTrials=The following serious adverse reactions are discussed in more details in other sections of labeling:
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| * Hepatic Injury
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| * Anaphylaxis and Other Allergic-Reactions
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| * Depression and Suicide
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| * Congestive Heart Failure
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| * Injection Site Necrosis and Reactions
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| * Leukopenia
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| * Flu-like Symptom Complex
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| * Seizures
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| '''Clinical Trials Experience'''
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| Because clinical trials are conducted under widely varying conditions and over varying lengths of time, adverse reaction rates observed in the clinical trials of BETASERON cannot be directly compared to rates in clinical trials of other drugs, and may not reflect the rates observed in practice.
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| Among 1407 patients with MS treated with BETASERON 0.25 mg every other day (including 1261 patients treated for greater than one year), the most commonly reported adverse reactions (at least 5% more frequent on BETASERON than on placebo) were injection site reaction, lymphopenia, flu-like symptoms, myalgia leukopenia, neutropenia, increased liver enzymes, headache, hypertonia, pain, rash, insomnia, abdominal pain, and asthenia. The most frequently reported adverse reactions resulting in clinical intervention (for example, discontinuation of BETASERON, adjustment in dosage, or the need for concomitant medication to treat an adverse reaction symptom) were depression, flu-like symptom complex, injection site reactions, leukopenia, increased liver enzymes, asthenia, hypertonia, and myasthenia.
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| Table 2 enumerates adverse reactions and laboratory abnormalities that occurred among patients treated with 0.25 mg of BETASERON every other day by subcutaneous injection in the pooled placebo-controlled trials (Study 1-4) at an incidence that was at least 2% more than that observed in the placebo-treated patients.
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| [[File:Betaseron clinical trials.png|600px|thumbnail|left]]
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| {{clear}}
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| In addition to the Adverse Reactions listed in Table 2, the following adverse reactions occurred more frequently on BETASERON than on placebo, but with a difference smaller than 2%: alopecia, anxiety, arthralgia, constipation, diarrhea, dizziness, dyspepsia, dysmenorrhea, leg cramps, menorrhagia, myasthenia, nausea, nervousness, palpitations, peripheral vascular disorder, prostatic disorder, tachycardia, urinary frequency, vasodilatation, and weight increase.
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| '''Laboratory Abnormalities'''
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| In the four clinical trials (Studies 1, 2, 3, and 4), leukopenia was reported in 18% and 6% of patients in BETASERON- and placebo-treated groups, respectively. No patients were withdrawn or dose reduced for neutropenia in Study 1. Three percent (3%) of patients in Studies 2 and 3 experienced leukopenia and were dose-reduced. Other abnormalities included increase of SGPT to greater than five times baseline value (12%), and increase of SGOT to greater than five times baseline value (4%). In Study 1, two patients were dose reduced for increased hepatic enzymes; one continued on treatment and one was ultimately withdrawn. In Studies 2 and 3, 1.5% of BETASERON patients were dose-reduced or interrupted treatment for increased hepatic enzymes. In Study 4, 1.7% of patients were withdrawn from treatment due to increased hepatic enzymes, two of them after a dose reduction. In Studies 1-4, nine (0.6%) patients were withdrawn from treatment with BETASERON for any laboratory abnormality, including four (0.3%) patients following dose reduction.
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| '''Immunogenicity'''
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| As with all therapeutic proteins, there is a potential for immunogenicity. Serum samples were monitored for the development of antibodies to BETASERON during Study 1. In patients receiving 0.25 mg every other day 56/124 (45%) were found to have serum neutralizing activity at one or more of the time points tested. In Study 4, neutralizing activity was measured every 6 months and at end of study. At individual visits after start of therapy, activity was observed in 17% up to 25% of the BETASERON-treated patients. Such neutralizing activity was measured at least once in 75 (30%) out of 251 BETASERON patients who provided samples during treatment phase; of these, 17 (23%) converted to negative status later in the study. Based on all the available evidence, the relationship between antibody formation and clinical safety or efficacy is not known.
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| These data reflect the percentage of patients whose test results were considered positive for antibodies to BETASERON using a biological neutralization assay that measures the ability of immune sera to inhibit the production of the interferon-inducible protein, MxA. Neutralization assays are highly dependent on the sensitivity and specificity of the assay. Additionally, the observed incidence of neutralizing activity in an assay may be influenced by several factors including sample handling, timing of sample collection, concomitant medications, and underlying disease. For these reasons, comparison of the incidence of antibodies to BETASERON with the incidence of antibodies to other products may be misleading.
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| Anaphylactic reactions have been reported with the use of BETASERON.
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| |postmarketing=The following adverse reactions have been identified during postapproval use of BETASERON. 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.
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| Blood and lymphatic system disorders: Anemia, Thrombocytopenia
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| Endocrine disorders: Hypothyroidism, Hyperthyroidism, Thyroid dysfunction
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| Metabolism and nutrition disorders: Triglyceride increased, Anorexia, Weight decrease, Weight increase
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| Psychiatric disorders: Anxiety, Confusion, Emotional lability
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| Nervous system disorders: Convulsion, Dizziness, Psychotic symptoms
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| Cardiac disorders: Cardiomyopathy, Palpitations, Tachycardia
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| Vascular disorders: Vasodilatation
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| Respiratory, thoracic and mediastinal disorders: Bronchospasm
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| Gastrointestinal disorders: Diarrhea, Nausea, Pancreatitis, Vomiting
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| Hepatobiliary disorders: Hepatitis, Gamma GT increased
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| Skin and subcutaneous tissue disorders: Alopecia, Pruritus, Skin discoloration, Urticaria
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| Musculoskeletal and connective tissue disorders: Arthralgia
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| Reproductive system and breast disorder: Menorrhagia
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| General disorders and administration site conditions: Fatal capillary leak syndrome1
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| 1The administration of cytokines to patients with a pre-existing monoclonal gammopathy has been associated with the development of this syndrome.
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| |drugInteractions=No formal drug interaction studies have been conducted with BETASERON.
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| |alcohol=Alcohol-Interferon Beta-1B interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.
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| }}
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