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Vectibix(Panitumumab Injection for Intravenous Use)

2012-08-09 01:02:26  作者:新特药房  来源:中国新特药网天津分站  浏览次数:475  文字大小:【】【】【
简介:英文药名: Vectibix(Panitumumab Injection) 中文药名: 维克替比(帕尼单抗注射剂) 品牌药生产厂家: Amgen Inc 药品介绍: 结直肠癌治疗药Vectibix(panitumumab、帕尼单抗)是第一个完全人源化单克隆抗 ...

英文药名: Vectibix(Panitumumab Injection)

中文药名: 维克替比(帕尼单抗注射剂)

生产厂家: Amgen Inc
药品介绍
2014年5月25日,安进(Amgen)抗癌新药已获FDA批准Vectibix(帕尼单抗,panitumumab)联合FOLFOX(一种基于奥沙利铂的化疗方案),用于野生型KRAS(外显子2)转移性结直肠癌(mCRC)患者的一线治疗。
此次批准,标志着Vectibix成为首个也是唯一一个与FOLFOX联合用于野生型KRAS mCRC一线治疗时能够提供显著生存利益的生物制剂。同时,此次批准,也使此前加速单药疗法批准转变为完全批准。
此外,FDA也批准了therascreen KRAS RGQ PCR试剂盒,该试剂盒由QIAGEN开发,用作Vectibix的伴侣诊断试剂盒。
Vectibix的获批,是基于III期PRIME和ASPECCT研究的数据。PRIME在野生型KRAS(外显子2)mCRC患者中开展,数据表明,与FOLFOX化疗组相比,Vectibix+FOLFOX联合用药组无进展生存期(PFS:9.6个月vs 8.0个月,p=0.002)取得了统计学意义的显著改善,并显著改善了总生存期(OS:23.8个月vs 19.4个月)。
ASPECCT研究中,将Vectibix作为单药疗法,并与爱必妥(Erbitux,通用名:西妥昔单抗,cetuximab)进行了对比,数据表明,在总生存期(OS)方面,Vectibix达到了相对于Erbitux的非劣性(non-inferior)主要终点。
关于Vectibix:
Vectibix于2006年9月首次获FDA批准,作为一种单药疗法,用于标准化疗(含氟尿嘧啶、奥沙利铂、伊立替康)后已发生癌细胞扩散的结直肠癌患者的治疗,是FDA批准的首个全人源化抗EGFR抗体,该药的获批,是基于疾病无进展生存期(PFS)数据。
Vectibix可与某些癌细胞上的表皮生长因子受体(EGFR)结合以减慢肿瘤生长速度,并在某些病例中缩小肿瘤体积。

HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use Vectibix safely and effectively. See full prescribing information for Vectibix.   
Vectibix ®(panitumumab)Injection for intravenous infusion
Initial U.S. Approval: 2006            
WARNING: DERMATOLOGIC TOXICITY See full prescribing information for complete boxed warning.
• Dermatologic toxicities were reported in 90% of patients and were severe in 15% of patients receiving monotherapy. (2.3, 5.1, 6.1)
RECENT MAJOR CHANGES
Boxed Warning: infusion reactions              05/2014
Indications and Usage (1)                      03/2015
Dosage and Administration (2)                  05/2014
Warnings and Precautions (5.2)                 03/2015
INDICATIONS AND USAGE
Vectibix is an epidermal growth factor receptor (EGFR) antagonist indicated for the treatment of wild-type KRAS (exon 2) metastatic colorectal cancer (mCRC) as determined by an FDA-approved test for this use:
In combination with FOLFOX for first-line treatment. (1.1, 14.2)
As monotherapy following disease progression after prior treatment with fluoropyrimidine, oxaliplatin, and irinotecan-containing chemotherapy. (1.1, 14.1)
Limitation of Use: Vectibix is not indicated for the treatment of patients with RAS-mutant mCRC or for whom RAS mutation status is unknown. (1.1, 2.1, 5.2, 12.1)
DOSAGE AND ADMINISTRATION
Administer 6 mg/kg every 14 days as an intravenous infusion over 60 minutes (≤ 1000 mg) or 90minutes (> 1000 mg). (2)
Infusion Reactions: Reduce infusion rate by 50% for mild reactions; terminate the infusion for severe infusion reactions. (2.3, 5.4)
Dermatologic Toxicity: Withhold or discontinue for severe or intolerable toxicity; reduce dose for recurrent, grade 3 toxicity. (2.3, 5.1)
DOSAGE FORMS AND STRENGTHS
Single-use vials (20 mg/mL): 100 mg/5 mL, 200 mg/10 mL,
400 mg/20 mL. (3)
CONTRAINDICATIONS
None
WARNINGS AND PRECAUTIONS
Dermatologic and Soft Tissue Toxicity: Monitor for dermatologic and soft tissue toxicities and withhold or discontinue Vectibix for severe or life-threatening complications.  Limit sun exposure. (5.1, 5.7)
Increased tumor progression, increased mortality, or lack of benefit in patients with RAS-mutant mCRC. (2.1, 5.2)
Electrolyte Depletion/Monitoring: Monitor electrolytes and institute appropriate treatment. (5.3)
Infusion Reactions: Terminate the infusion for severe infusion reactions. (5.4)
Pulmonary Fibrosis/Interstitial Lung Disease (ILD): Permanently discontinue Vectibix in patients developing ILD. (5.6)
Ocular Toxicities: Monitor for keratitis or ulcerative keratitis. Interrupt or discontinue Vectibix for acute or worsening keratitis. (5.8)
ADVERSE REACTIONS
Most common adverse reactions (≥ 20%) of Vectibix as monotherapy are skin rash with variable presentations, paronychia, fatigue, nausea, and diarrhea. (6.1)
Most common adverse reactions (≥ 20%) in clinical trials of Vectibix in combination with FOLFOX chemotherapy are diarrhea, stomatitis, mucosal inflammation, asthenia, paronychia, anorexia, hypomagnesemia, hypokalemia, rash, acneiform dermatitis, pruritus, and dry skin. (6.1)
To report SUSPECTED ADVERSE REACTIONS, contact Amgen Inc. at 1-800-77-AMGEN (1-800-772-6436) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
USE IN SPECIFIC POPULATIONS
Pregnancy: Based on animal data, may cause fetal harm. (8.1) Physicians are encouraged to enroll pregnant patients in Amgen’s Pregnancy Surveillance Program by calling 1-800-772-6436(1-800-77-AMGEN). (8.1)
Nursing Mothers: Discontinue nursing or discontinue drug, taking into account the importance of the drug to the mother. (8.3)
See 17 for PATIENT COUNSELING INFORMATION.
Revised: 3/2015
FULL PRESCRIBING INFORMATION: CONTENTS*
1 INDICATIONS AND USAGE
1.1  Metastatic Colorectal Cancer
Vectibix is indicated for the treatment of patients with wild-type KRAS (exon 2 in codons 12 or 13) metastatic colorectal cancer (mCRC) as determined by an FDA-approved test for this use:
• As first-line therapy in combination with FOLFOX [see Clinical Studies (14.2)].
• As monotherapy following disease progression after prior treatment with fluoropyrimidine-, oxaliplatin-, and irinotecan-containing chemotherapy [see Clinical Studies (14.1)].
Limitation of Use: Vectibix is not indicated for the treatment of patients with RAS-mutant mCRC or for whom RAS mutation status is unknown [see Dosage and Administration (2.1), Warnings and Precautions (5.2), and Clinical Pharmacology (12.1)].
2 DOSAGE AND ADMINISTRATION
2.1 Patient Selection
Prior to initiation of treatment with Vectibix, assess RAS mutational status in colorectal tumors and confirm the absence of a RAS mutation.  Information on FDA-approved tests for the detection of KRAS mutations in patients with metastatic colorectal cancer is available at: http://www.fda.gov/CompanionDiagnostics.
2.2 Recommended Dose
The recommended dose of Vectibix is 6 mg/kg, administered as an intravenous infusion over 60 minutes, every 14 days. If the first infusion is tolerated, administer subsequent infusions over 30 to 60 minutes. Administer doses higher than 1000 mg over 90 minutes [see Dosage and Administration (2.4)].
Appropriate medical resources for the treatment of severe infusion reactions should be available during Vectibix infusions [see Warnings and Precautions (5.4)].
2.3 Dose Modifications
Dose Modifications for Infusion Reactions [see Warnings and Precautions (5.4) and Adverse Reactions (6.1, 6.3)]
Reduce infusion rate by 50% in patients experiencing a mild or moderate (grade 1 or 2) infusion reaction for the duration of that infusion.
Terminate the infusion in patients experiencing severe infusion reactions.  Depending on the severity and/or persistence of the reaction, permanently discontinue Vectibix.
Dose Modifications for Dermatologic Toxicity [see Boxed Warning, Warnings and Precautions (5.1), and Adverse Reactions (6.1, 6.3)]
• Upon first occurrence of a grade 3 (NCI-CTC/CTCAE) dermatologic reaction, withhold 1 to 2 doses of Vectibix. If the reaction improves to < grade 3, reinitiate Vectibix at the original dose.
• Upon the second occurrence of a grade 3 (NCI-CTC/CTCAE) dermatologic reaction, withhold 1 to 2 doses of Vectibix. If the reaction improves to < grade 3, reinitiate Vectibix at 80% of the original dose.
• Upon the third occurrence of a grade 3 (NCI-CTC/CTCAE) dermatologic reaction, withhold 1 to 2 doses of Vectibix. If the reaction improves to < grade 3, reinitiate Vectibix at 60% of the original dose.
• Upon the fourth occurrence of a grade 3 (NCI-CTC/CTCAE) dermatologic reaction, permanently discontinue Vectibix.
Permanently discontinue Vectibix following the occurrence of a grade 4 dermatologic reaction or for a grade 3 (NCI-CTC/CTCAE) dermatologic reaction that does not recover after withholding 1 or 2 doses.
2.4 Preparation and Administration
Do not administer Vectibix as an intravenous push or bolus.
Preparation 
Prepare the solution for infusion, using aseptic technique, as follows:
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration.  Although Vectibix should be colorless, the solution may contain a small amount of visible translucent-to-white, amorphous, proteinaceous, panitumumab particulates (which will be removed by filtration; see below).  Do not shake.  Do not administer Vectibix if discoloration is observed.
Withdraw the necessary amount of Vectibix for a dose of 6 mg/kg.
Dilute to a total volume of 100 mL with 0.9% sodium chloride injection, USP.  Doses higher than 1000 mg should be diluted to 150 mL with 0.9% sodium chloride injection, USP.  Do not exceed a final concentration of 10 mg/mL.
Mix diluted solution by gentle inversion.  Do not shake.
Administration
• Administer using a low-protein-binding 0.2 μm or 0.22 μm in-line filter.
• Vectibix must be administered via infusion pump.
◦ Flush line before and after Vectibix administration with 0.9% sodium chloride injection, USP, to avoid mixing with other drug products or intravenous solutions. Do not mix Vectibix with, or administer as an infusion with, other medicinal products. Do not add other medications to solutions containing panitumumab.
◦ Infuse doses of 1000 mg or lower over 60 minutes through a peripheral intravenous line or indwelling intravenous catheter. If the first infusion is tolerated, administer subsequent infusions over 30 to 60 minutes. Administer doses higher than 1000 mg over 90 minutes.
• Use the diluted infusion solution of Vectibix within 6 hours of preparation if stored at room temperature, or within 24 hours of dilution if stored at 2° to 8°C (36º to 46ºF). DO NOT FREEZE.
• Discard any unused portion remaining in the vial.
3  DOSAGE FORMS AND STRENGTHS
100 mg panitumumab in 5 mL (20 mg/mL) single-use vial.
200 mg panitumumab in 10 mL (20 mg/mL) single-use vial.
400 mg panitumumab in 20 mL (20 mg/mL) single-use vial.
4 CONTRAINDICATIONS
None.
5 WARNINGS AND PRECAUTIONS
5.1 Dermatologic and Soft Tissue Toxicity
In Study 1, dermatologic toxicities occurred in 90% of patients and were severe (NCI-CTC grade 3 and higher) in 15% of patients with mCRC receiving Vectibix. The clinical manifestations included, but were not limited to, acneiform dermatitis, pruritus, erythema, rash, skin exfoliation, paronychia, dry skin, and skin fissures.
Monitor patients who develop dermatologic or soft tissue toxicities while receiving Vectibix for the development of inflammatory or infectious sequelae. Life-threatening and fatal infectious complications including necrotizing fasciitis, abscesses, and sepsis have been observed in patients treated with Vectibix. Life-threatening and fatal bullous mucocutaneous disease with blisters, erosions, and skin sloughing has also been observed in patients treated with Vectibix. It could not be determined whether these mucocutaneous adverse reactions were directly related to EGFR inhibition or to idiosyncratic immune-related effects (eg, Stevens-Johnson syndrome or toxic epidermal necrolysis). Withhold or discontinue Vectibix for dermatologic or soft tissue toxicity associated with severe or life-threatening inflammatory or infectious complications [see Boxed Warning and Adverse Reactions (6.1, 6.3)]. Dose modifications for Vectibix concerning dermatologic toxicity are provided [see Dosage and Administration (2.3)].
5.2 Increased Tumor Progression, Increased Mortality, or Lack of Benefit in Patients with RAS- Mutant mCRC
Vectibix is not indicated for the treatment of patients with colorectal cancer that harbor somatic mutations in exon 2 (codons 12 and 13), exon 3 (codons 59 and 61), and exon 4 (codons 117 and 146) of either KRAS or NRAS and hereafter is referred to as “RAS” [see Indications and Usage (1.1), Dosage and Administration (2.1), Clinical Pharmacology (12.1) and Clinical Studies (14)]. 
Retrospective subset analyses across several randomized clinical trials were conducted to investigate the role of RAS mutations on the clinical effects of anti-EGFR-directed monoclonal antibodies (panitumumab or cetuximab). Anti-EGFR antibodies in patients with tumors containing RAS mutations resulted in exposing those patients to anti-EGFR related adverse reactions without clinical benefit from these agents [see Indications and Usage (1.1), and Clinical Pharmacology (12.1)].
Additionally, in Study 3, 272 patients with RAS-mutant mCRC tumors received Vectibix in combination with FOLFOX and 276 patients received FOLFOX alone.  In an exploratory subgroup analysis, OS was shorter (HR = 1.21, 95% CI 1.01-1.45) in patients with RAS-mutant mCRC who received Vectibix and FOLFOX versus FOLFOX alone [see Indications and Usage (1.1)]. 
5.3  Electrolyte Depletion/Monitoring
Progressively decreasing serum magnesium levels leading to severe (grade 3-4) hypomagnesemia occurred in up to 7% (in Study 2) of patients across clinical trials. Monitor patients for hypomagnesemia and hypocalcemia prior to initiating Vectibix treatment, periodically during Vectibix treatment, and for up to 8 weeks after the completion of treatment. Other electrolyte disturbances, including hypokalemia, have also been observed. Replete magnesium and other electrolytes as appropriate.
5.4 Infusion Reactions
In Study 1, 4% of patients experienced infusion reactions and 1% of patients experienced severe infusion reactions (NCI-CTC grade 3-4).
Infusion reactions, manifesting as fever, chills, dyspnea, bronchospasm, and hypotension, can occur following Vectibix administration [see Adverse Reactions (6.1, 6.3)]. Fatal infusion reactions occurred in postmarketing experience. Terminate the infusion for severe infusion reactions [see Dosage and Administration (2.3)].
5.5 Acute Renal Failure in Combination with Chemotherapy
Severe diarrhea and dehydration, leading to acute renal failure and other complications, have been observed in patients treated with Vectibix in combination with chemotherapy.
5.6 Pulmonary Fibrosis/Interstitial Lung Disease (ILD)
Fatal and nonfatal cases of interstitial lung disease (ILD) (1%) and pulmonary fibrosis have been observed in patients treated with Vectibix. Pulmonary fibrosis occurred in less than 1% (2/1467) of patients enrolled in clinical studies of Vectibix.  In the event of acute onset or worsening of pulmonary symptoms, interrupt Vectibix therapy.  Discontinue Vectibix therapy if ILD is confirmed.
In patients with a history of interstitial pneumonitis or pulmonary fibrosis, or evidence of interstitial pneumonitis or pulmonary fibrosis, the benefits of therapy with Vectibix versus the risk of pulmonary complications must be carefully considered.
5.7  Photosensitivity
Exposure to sunlight can exacerbate dermatologic toxicity.  Advise patients to wear sunscreen and hats and limit sun exposure while receiving Vectibix.
5.8  Ocular Toxicities
Keratitis and ulcerative keratitis, known risk factors for corneal perforation, have been reported with Vectibix use. Monitor for evidence of keratitis or ulcerative keratitis. Interrupt or discontinue Vectibix therapy for acute or worsening keratitis.
5.9  Increased Mortality and Toxicity with Vectibix in Combination with Bevacizumab and Chemotherapy
In an interim analysis of an open-label, multicenter, randomized clinical trial in the first-line setting in patients with mCRC, the addition of Vectibix to the combination of bevacizumab and chemotherapy resulted in decreased OS and increased incidence of NCI-CTC grade 3-5 (87% vs 72%) adverse reactions.  NCI-CTC grade 3-4 adverse reactions occurring at a higher rate in Vectibix-treated patients included rash/acneiform dermatitis (26% vs 1%), diarrhea (23% vs 12%), dehydration (16% vs 5%), primarily occurring in patients with diarrhea, hypokalemia (10% vs 4%), stomatitis/mucositis (4% vs < 1%), and hypomagnesemia (4% vs 0).
NCI-CTC grade 3-5 pulmonary embolism occurred at a higher rate in Vectibix-treated patients (7% vs 3%) and included fatal events in three (< 1%) Vectibix-treated patients.
As a result of the toxicities experienced, patients randomized to Vectibix, bevacizumab, and chemotherapy received a lower mean relative dose intensity of each chemotherapeutic agent (oxaliplatin, irinotecan, bolus 5-FU, and/or infusional 5-FU) over the first 24 weeks on study compared with those randomized to bevacizumab and chemotherapy.
6 ADVERSE REACTIONS
The following adverse reactions are discussed in greater detail in other sections of the label:
Dermatologic and Soft Tissue Toxicity [see Boxed Warning, Dosage and Administration (2.3), and Warnings and Precautions (5.1)]
Increased Tumor Progression, Increased Mortality, or Lack of Benefit in RAS- and KRAS-Mutant mCRC [see Indications and Usage (1.1) and Warnings and Precautions (5.2)]
Electrolyte Depletion/Monitoring [see Warnings and Precautions (5.3)]
Infusion Reactions [see Dosage and Administration (2.3), and Warnings and Precautions (5.4)]
Acute Renal Failure in Combination with Chemotherapy [see Warnings and Precautions (5.5)]
Pulmonary Fibrosis/Interstitial Lung Disease (ILD) [see Warnings and Precautions (5.6)]
Photosensitivity [see Warnings and Precautions (5.7)]
Ocular Toxicities [see Warnings and Precautions (5.8)]
Increased Mortality and Toxicity with Vectibix in combination with Bevacizumab and Chemotherapy [see Warnings and Precautions (5.9)]
6.1 Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates in the clinical trials of a drug cannot be directly compared to rates in clinical trials of another drug and may not reflect the rates observed in practice.  The adverse reaction information from clinical studies does, however, provide a basis for identifying the adverse events that appear to be related to drug use and for approximating rates.
Safety data are presented from two clinical trials in which patients received Vectibix: Study 1, an open-label, multinational, randomized, controlled, monotherapy clinical trial (N = 463) evaluating Vectibix with best supportive care (BSC) versus BSC alone in patients with EGFR-expressing mCRC and Study 3, a randomized, controlled trial (N = 1183) in patients with mCRC that evaluated Vectibix in combination with FOLFOX chemotherapy versus FOLFOX chemotherapy alone. Safety data for Study 3 are limited to 656 patients with wild-type KRAS mCRC.
Vectibix Monotherapy
In Study 1, the most common adverse reactions (≥ 20%) with Vectibix were skin rash with variable presentations, paronychia, fatigue, nausea, and diarrhea.
The most common (> 5%) serious adverse reactions in the Vectibix arm were general physical health deterioration and intestinal obstruction. The most frequently reported adverse reactions for Vectibix leading to withdrawal were general physical health deterioration (n = 2) and intestinal obstruction (n = 2).
For Study 1, the data described in Table 1 and in other sections below, except where noted, reflect exposure to Vectibix administered to patients with mCRC as a single agent at the recommended dose and schedule (6 mg/kg every 2 weeks).
Table 1:  Adverse Reactions (≥ 5% Difference) Observed in Patients Treated with Vectibix Monotherapy and Best Supportive Care Compared to Best Supportive Care Alone (Study 1)  

Study 1

Vectibix Plus
Best Supportive Care

(N = 229)

Best Supportive Care

(N = 234)

SYSTEM ORGAN CLASS
   Preferred Term
Any
Grade
n (%)
Grade
3-4
n (%)
Any
Grade
n (%)
Grade
3-4
n (%)
EYE DISORDERS        
   Growth of eyelashes 13 (6)      
GASTROINTESTINAL DISORDERS        
   Nausea 52 (23) 2 (< 1) 37 (16) 1 (< 1)
   Diarrhea 49 (21) 4 (2) 26 (11)  
   Vomiting 43 (19) 6 (3) 28 (12) 2 (< 1)
   Stomatitis 15 (7)   2 (< 1)  
GENERAL DISORDERS AND ADMINISTRATION SITE CONDITIONS        
   Fatigue 60 (26) 10 (4) 34 (15) 7 (3)
   Mucosal inflammation 15 (7) 1 (< 1) 2 (< 1)  
INFECTIONS AND INFESTATIONS        
   Paronychia 57 (25) 4 (2)    
RESPIRATORY, THORACIC, AND MEDIASTINAL DISORDERS        
   Dyspnea 41 (18) 12 (5) 30 (13) 8 (3)
   Cough 34 (15) 1 (< 1) 17 (7)  
SKIN AND SUBCUTANEOUS TISSUE DISORDERS        
   Erythema 150 (66) 13 (6) 2 (< 1)  
   Pruritus 132 (58) 6 (3) 4 (2)  
   Acneiform dermatitis 131 (57) 17 (7) 2 (< 1)  
   Rash 51 (22) 3 (1) 2 (< 1)  
   Skin fissures 45 (20) 3 (1) 1 (< 1)  
   Exfoliative rash 41 (18) 4 (2)    
   Acne 31 (14) 3 (1)    
   Dry skin 23 (10)      
   Nail disorder 22 (10)      
   Skin exfoliation 21 (9) 2 (< 1)    
   Skin ulcer 13 (6) 1 (< 1)
Adverse reactions in Study 1 that did not meet the threshold criteria for inclusion in Table 1 were conjunctivitis (4.8% vs < 1%), dry mouth (4.8% vs 0%), pyrexia (16.6% vs 13.2%), chills (3.1% vs < 1%), pustular rash (4.4% vs 0%), papular rash (1.7% vs 0%), dehydration (2.6% vs 1.7%), epistaxis (3.9% vs 0%), and pulmonary embolism (1.3% vs 0%).
In Study 1, dermatologic toxicities occurred in 90% of patients receiving Vectibix. Skin toxicity was severe (NCI-CTC grade 3 and higher) in 15% of patients. Ocular toxicities occurred in 16% of patients and included, but were not limited to, conjunctivitis (5%). One patient experienced an NCI-CTC grade 3 event of mucosal inflammation. The incidence of paronychia was 25% and was severe in 2% of patients [see Warnings and Precautions (5.1)].
In Study 1 (N = 229), median time to the development of dermatologic, nail, or ocular toxicity was 12 days after the first dose of Vectibix; the median time to most severe skin/ocular toxicity was 15 days after the first dose of Vectibix; and the median time to resolution after the last dose of Vectibix was 98 days.  Severe toxicity necessitated dose interruption in 11% of Vectibix-treated patients [see Dosage and Administration (2.3)].
Subsequent to the development of severe dermatologic toxicities, infectious complications, including sepsis, septic death, necrotizing fasciitis, and abscesses requiring incisions and drainage were reported.
Vectibix in Combination with FOLFOX Chemotherapy
The most commonly reported adverse reactions (≥ 20%) in patients with wild-type KRAS mCRC receiving Vectibix (6 mg/kg every 2 weeks) and FOLFOX therapy (N = 322) in Study 3 were diarrhea, stomatitis, mucosal inflammation, asthenia, paronychia, anorexia, hypomagnesemia, hypokalemia, rash, acneiform dermatitis, pruritus, and dry skin (Table 2). Serious adverse reactions (≥ 2% difference between treatment arms) in Vectibix-treated patients with wild-type KRAS mCRC were diarrhea and dehydration. The commonly reported adverse reactions (≥ 1%) leading to discontinuation in patients with wild-type KRAS mCRC receiving Vectibix were rash, paresthesia, fatigue, diarrhea, acneiform dermatitis, and hypersensitivity.  One grade 5 adverse reaction, hypokalemia, occurred in a patient who received Vectibix.
Table 2:  Adverse Reactions (≥ 5% Difference) Observed in Patients with Wild-type (WT) KRAS Tumors Treated with Vectibix and FOLFOX Chemotherapy Compared to FOLFOX Chemotherapy Alone (Study 3) 

Vectibix Plus FOLFOX
(n = 322)
FOLFOX Alone
(n = 327)
SYSTEM ORGAN CLASS
Preferred Term
Any Grade
n (%)
Grade 3-4
n (%)
Any Grade
n (%)
Grade 3-4
n (%)
EYE DISORDERS        
   Conjunctivitis 58 (18) 5 (2) 10 (3)  
GASTROINTESTINAL DISORDERS        
   Diarrhea 201 (62) 59 (18) 169 (52) 29 (9)
   Stomatitis 87 (27) 15 (5) 42 (13) 1 (< 1)
GENERAL DISORDERS AND ADMINISTRATION SITE CONDITIONS        
   Mucosal inflammation 82 (25) 14 (4) 53 (16) 1 (< 1)
   Asthenia 79 (25) 16 (5) 62 (19) 11 (3)
INFECTIONS AND INFESTATIONS        
   Paronychia 68 (21) 11 (3)    
INVESTIGATIONS        
   Weight decreased 58 (18) 3 (< 1) 22 (7)  
METABOLISM AND NUTRITION DISORDERS        
   Anorexia 116 (36) 14 (4) 85 (26) 6 (2)
   Hypomagnesemia 96 (30) 21 (7) 26 (8) 1 (< 1)
   Hypokalemia 68 (21) 32 (10) 42 (13) 15 (5)
   Dehydration 26 (8) 8 (2) 10 (3) 5 (2)
RESPIRATORY, THORACIC, AND MEDIASTINAL DISORDERS        
   Epistaxis 46 (14)   30 (9)  
SKIN AND SUBCUTANEOUS TISSUE DISORDERS        
   Rash 179 (56) 55 (17) 24 (7) 1 (< 1)
   Acneiform dermatitis 104 (32) 33 (10)    
   Pruritus 75 (23) 3 (< 1) 14 (4)  
   Dry skin 68 (21) 5 (2) 13 (4)  
   Erythema 50 (16) 7 (2) 14 (4)  
   Skin fissures 50 (16) 1 (< 1) 1 (< 1)  
   Alopecia 47 (15)   30 (9)  
   Acne 44 (14) 10 (3) 1 (< 1)  
   Nail disorder 32 (10) 4 (1) 4 (1)  
   Palmar-plantar erythrodysesthesia syndrome 30 (9) 4 (1) 9 (3) 2 (< 1)
Adverse reactions that did not meet the threshold criteria for inclusion in Table 2 were abdominal pain (28% vs 23%), localized infection (3.7% vs < 1%), cellulitis (2.5% vs 0%), hypocalcemia (5.6% vs 2.1%), and deep vein thrombosis (5.3% vs 3.1%).
Infusion Reactions
Infusional toxicity manifesting as fever, chills, dyspnea, bronchospasm or hypotension was assessed within 24 hours of an infusion during the clinical study.  Vital signs and temperature were measured within 30 minutes prior to initiation and upon completion of the Vectibix infusion.  The use of premedication was not standardized in the clinical trials.  Thus, the utility of premedication in preventing the first or subsequent episodes of infusional toxicity is unknown.  Across clinical trials of Vectibix monotherapy, 3% (24/725) experienced infusion reactions of which < 1% (3/725) were severe (NCI-CTC grade 3-4).  In one patient, Vectibix was permanently discontinued for a serious infusion reaction [see Dosage and Administration (2.2, 2.3)].
6.2  Immunogenicity
As with all therapeutic proteins, there is potential for immunogenicity. The immunogenicity of Vectibix has been evaluated using two different screening immunoassays for the detection of binding anti-panitumumab antibodies: an acid dissociation bridging enzyme-linked immunosorbent assay (ELISA) detecting high-affinity antibodies and a Biacore® biosensor immunoassay detecting both high- and low-affinity antibodies. For patients whose sera tested positive in screening immunoassays, an in vitro biological assay was performed to detect neutralizing antibodies.
Monotherapy: The incidence of binding anti-panitumumab antibodies (excluding preexisting and transient positive patients) was 0.4% (5/1123) as detected by the acid dissociation ELISA and 3.2% (36/1123) as detected by the Biacore® assay.  The incidence of neutralizing anti-panitumumab antibodies (excluding preexisting and transient positive patients) was 0.8% (9/1123). There was no evidence of altered pharmacokinetic or safety profiles in patients who developed antibodies to Vectibix.
In combination with chemotherapy: The incidence of binding anti-panitumumab antibodies (excluding preexisting positive patients) was 0.9% (12/1297) as detected by the acid dissociation ELISA and 0.7% (9/1296) as detected by the Biacore® assay. The incidence of neutralizing anti-panitumumab antibodies (excluding preexisting positive patients) was 0.2% (2/1297). No evidence of an altered safety profile was found in patients who developed antibodies to Vectibix.
The detection of antibody formation is highly dependent on the sensitivity and specificity of the assay. Additionally, the observed incidence of antibody (including neutralizing antibody) positivity in an assay may be influenced by several factors, including assay methodology, sample handling, timing of sample collection, concomitant medications, and underlying disease. For these reasons, comparison of the incidence of antibodies to panitumumab with the incidence of antibodies to other products may be misleading.
6.3  Postmarketing Experience
The following adverse reactions have been identified during post-approval use of Vectibix. Because these reactions are reported in a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Skin and subcutaneous tissue disorders: Skin necrosis, angioedema, life-threatening and fatal bullous mucocutaneous disease [see Boxed Warning, Dosage and Administration (2.3), and Warnings and Precautions (5.1)]
Immune system disorders: Infusion reaction [see Dosage and Administration (2.3) and Warnings and Precautions (5.4)]
Eye disorders: Keratitis/ulcerative keratitis [see Warnings and Precautions (5.8)]
7  DRUG INTERACTIONS
No formal drug-drug interaction studies have been conducted between Vectibix and oxaliplatin or fluoropyrimidine.
8  USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
Pregnancy Category C 
There are no studies of Vectibix in pregnant women.  Reproduction studies in cynomolgus monkeys treated with 1.25 to 5 times the recommended human dose of panitumumab resulted in significant embryolethality and abortions; however, no other evidence of teratogenesis was noted in offspring [see Nonclinical Toxicology (13.3)]. Vectibix should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.
Based on animal models, EGFR is involved in prenatal development and may be essential for normal organogenesis, proliferation, and differentiation in the developing embryo. Human IgG is known to cross the placental barrier; therefore, panitumumab may be transmitted from the mother to the developing fetus, and has the potential to cause fetal harm when administered to pregnant women.
Women who become pregnant during Vectibix treatment are encouraged to enroll in Amgen’s Pregnancy Surveillance Program.  Patients or their physicians should call 1-800-77-AMGEN (1-800-772-6436) to enroll.
8.3  Nursing Mothers
It is not known whether panitumumab is excreted into human milk; however, human IgG is excreted into human milk.  Published data suggest that breast milk antibodies do not enter the neonatal and infant circulation in substantial amounts.  Because many drugs are excreted into human milk and because of the potential for serious adverse reactions in nursing infants from Vectibix, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.  If nursing is interrupted, based on the mean half-life of panitumumab, nursing should not be resumed earlier than 2 months following the last dose of Vectibix [see Clinical Pharmacology (12.3)].
Women who are nursing during Vectibix treatment are encouraged to enroll in Amgen’s Lactation Surveillance Program.  Patients or their physicians should call 1-800-77-AMGEN (1-800-772-6436) to enroll.
8.4 Pediatric Use
The safety and effectiveness of Vectibix have not been established in pediatric patients. The pharmacokinetic profile of Vectibix has not been studied in pediatric patients.
8.5 Geriatric Use
Of the 737 patients who received Vectibix monotherapy in Study 1 and 2, 36% were 65 and over while 8% were 75 and over. No overall differences in safety or efficacy were observed in elderly patients (≥ 65 years of age) treated with Vectibix monotherapy.
Of the 322 patients in Study 3 who received Vectibix plus FOLFOX, 128 (40%) were 65 and over while 8% were 75 and over. Patients older than 65 years of age experienced an increased incidence of serious adverse events (52% vs 36%) and an increased incidence of serious diarrhea (15% vs 5%) as compared to younger patients.
10  OVERDOSAGE
Doses up to approximately twice the recommended therapeutic dose (12 mg/kg) resulted in adverse reactions of skin toxicity, diarrhea, dehydration, and fatigue.
11  DESCRIPTION
Vectibix (panitumumab) is a recombinant, human IgG2 kappa monoclonal antibody that binds specifically to the human epidermal growth factor receptor (EGFR).  Panitumumab has an approximate molecular weight of 147 kDa.  Panitumumab is produced in genetically engineered mammalian (Chinese hamster ovary) cells.
Vectibix is a sterile, colorless, pH 5.6 to 6.0 liquid for intravenous (IV) infusion, which may contain a small amount of visible translucent-to-white, amorphous, proteinaceous, panitumumab particulates.  Each single-use 5 mL vial contains 100 mg of panitumumab, 29 mg sodium chloride, 34 mg sodium acetate, and Water for Injection, USP.  Each single-use 10 mL vial contains 200 mg of panitumumab, 58 mg sodium chloride, 68 mg sodium acetate, and Water for Injection, USP.  Each single-use 20 mL vial contains 400 mg of panitumumab, 117 mg sodium chloride, 136 mg sodium acetate, and Water for Injection, USP.
12  CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
The EGFR is a transmembrane glycoprotein that is a member of a subfamily of type I receptor tyrosine kinases, including EGFR, HER2, HER3, and HER4. EGFR is constitutively expressed in normal epithelial tissues, including the skin and hair follicle.  EGFR is overexpressed in certain human cancers, including colon and rectum cancers. Interaction of EGFR with its normal ligands (eg, EGF, transforming growth factor-alpha) leads to phosphorylation and activation of a series of intracellular proteins, which in turn regulate transcription of genes involved with cellular growth and survival, motility, and proliferation. KRAS (Kirsten rat sarcoma 2 viral oncogene homologue) and NRAS (Neuroblastoma RAS viral oncogene homologue) are highly related members of the RAS oncogene family. Signal transduction through the EGFR can result in activation of the wild-type KRAS and NRAS proteins; however, in cells with activating RAS somatic mutations, the RAS-mutant proteins are continuously active and appear independent of EGFR regulation.
Panitumumab binds specifically to EGFR on both normal and tumor cells, and competitively inhibits the binding of ligands for EGFR.  Nonclinical studies show that binding of panitumumab to the EGFR prevents ligand-induced receptor autophosphorylation and activation of receptor-associated kinases, resulting in inhibition of cell growth, induction of apoptosis, decreased proinflammatory cytokine and vascular growth factor production, and internalization of the EGFR.  In vitro assays and in vivo animal studies demonstrate that panitumumab inhibits the growth and survival of selected human tumor cell lines expressing EGFR.
12.3 Pharmacokinetics
Panitumumab administered as a single agent exhibits nonlinear pharmacokinetics.
Following single-dose administrations of panitumumab as 1-hour infusions, the area under the concentration-time curve (AUC) increased in a greater than dose-proportional manner, and clearance (CL) of panitumumab decreased from 30.6 to 4.6 mL/day/kg as the dose increased from 0.75 to 9 mg/kg.  However, at doses above 2 mg/kg, the AUC of panitumumab increased in an approximately dose-proportional manner.
Following the recommended dose regimen (6 mg/kg given once every 2 weeks as a 1-hour infusion), panitumumab concentrations reached steady-state levels by the third infusion with mean (± SD) peak and trough concentrations of 213 ± 59 and 39 ± 14 mcg/mL, respectively. The mean (± SD) AUC0-tau and CL were 1306 ± 374 mcg•day/mL and 4.9 ± 1.4 mL/kg/day, respectively.  The elimination half-life was approximately 7.5 days (range: 3.6 to 10.9 days).
A population pharmacokinetic analysis was performed to explore the potential effects of selected covariates on panitumumab pharmacokinetics.  Results suggest that age (21-88 years), gender, race (15% nonwhite), mild-to-moderate renal dysfunction, mild-to-moderate hepatic dysfunction, and EGFR membrane-staining intensity (1+, 2+, and 3+) in tumor cells had no apparent impact on the pharmacokinetics of panitumumab.
No formal pharmacokinetic studies of panitumumab have been conducted in patients with renal or hepatic impairment.
13  NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
No carcinogenicity or mutagenicity studies of panitumumab have been conducted. It is not known if panitumumab can impair fertility in humans. Prolonged menstrual cycles and/or amenorrhea occurred in normally cycling, female cynomolgus monkeys treated weekly with 1.25 to 5 times the recommended human dose of panitumumab (based on body weight). Menstrual cycle irregularities in panitumumab-treated female monkeys were accompanied by both a decrease and delay in peak progesterone and 17β-estradiol levels. Normal menstrual cycling resumed in most animals after discontinuation of panitumumab treatment. A no-effect level for menstrual cycle irregularities and serum hormone levels was not identified. The effects of panitumumab on male fertility have not been studied. However, no adverse effects were observed microscopically in reproductive organs from male cynomolgus monkeys treated for 26 weeks with panitumumab at doses of up to approximately 5-fold the recommended human dose (based on body weight).
13.2 Animal Toxicology and/or Pharmacology
Weekly administration of panitumumab to cynomolgus monkeys for 4 to 26 weeks resulted in dermatologic findings, including dermatitis, pustule formation and exfoliative rash, and deaths secondary to bacterial infection and sepsis at doses of 1.25 to 5-fold higher (based on body weight) than the recommended human dose.
13.3 Reproductive and Developmental Toxicology
Pregnant cynomolgus monkeys were treated weekly with panitumumab during the period of organogenesis (gestation day [GD] 20-50). While no panitumumab was detected in serum of neonates from panitumumab-treated dams, anti-panitumumab antibody titers were present in 14 of 27 offspring delivered at GD 100. There were no fetal malformations or other evidence of teratogenesis noted in the offspring. However, significant increases in embryolethality and abortions occurred at doses of approximately 1.25 to 5 times the recommended human dose (based on body weight).
14  CLINICAL STUDIES
14.1 Recurrent or Refractory mCRC
The safety and efficacy of Vectibix was demonstrated in Study 1, an open-label, multinational, randomized, controlled trial of 463 patients with EGFR-expressing, metastatic carcinoma of the colon or rectum, and in Study 2, an open-label, multicenter, multinational, randomized trial of 1010 patients with wild-type KRAS mCRC.
Study 1
Patients in Study 1 were required to have progressed on or following treatment with a regimen(s) containing a fluoropyrimidine, oxaliplatin, and irinotecan; progression was confirmed by an independent review committee (IRC) masked to treatment assignment for 76% of the patients. Patients were randomized (1:1) to receive panitumumab at a dose of 6 mg/kg given once every 2 weeks plus BSC (N = 231) or BSC alone (N = 232) until investigator-determined disease progression. Randomization was stratified based on Eastern Cooperative Oncology Group (ECOG) performance status (PS) (0 and 1 vs 2) and geographic region (Western Europe, Eastern/Central Europe, or other). Upon investigator-determined disease progression, patients in the BSC-alone arm were eligible to receive panitumumab and were followed until disease progression was confirmed by the IRC.
Based upon IRC determination of disease progression, a statistically significant prolongation in PFS was observed in patients receiving panitumumab compared to those receiving BSC alone. The mean PFS was 96 days in the panitumumab arm and 60 days in the BSC-alone arm.
The study results were analyzed in the wild-type KRAS subgroup where KRAS status was retrospectively determined using archived paraffin-embedded tumor tissue.  KRAS mutation status was determined in 427 patients (92%); of these, 243 (57%) had no detectable KRAS mutations in either codons 12 or 13.  The hazard ratio for PFS in patients with wild-type KRAS mCRC was 0.45 (95% CI: 0.34-0.59) favoring the panitumumab arm.  The response rate was 17% for the panitumumab arm and 0% for BSC.  There were no differences in OS; 77% of patients in the BSC arm received panitumumab at the time of disease progression.
Study 2
Study 2 was an open-label, multicenter, multinational, randomized (1:1) clinical trial, stratified by region (North America, Western Europe, and Australia versus rest of the world) and ECOG PS (0 and 1 vs 2) in patients with wild-type KRAS mCRC.  A total of 1010 patients who received prior treatment with irinotecan, oxaliplatin, and a thymidylate synthase inhibitor were randomized to receive Vectibix 6 mg/kg intravenously over 60 minutes every 14 days or cetuximab 400 mg/m2 intravenously over 120 minutes on day 1 followed by 250 mg/m2 intravenously over 60 minutes every 7 days.  The trial excluded patients with clinically significant cardiac disease and interstitial lung disease.  The major efficacy analysis tested whether the OS of Vectibix was noninferior to cetuximab. Data for investigator-assessed PFS and objective response rate (ORR) were also collected.  The criteria for noninferiority was for Vectibix to retain at least 50% of the OS benefit of cetuximab based on an OS hazard ratio of 0.55 from the NCIC CTG CO.17 study relative to BSC.
In Study 2, 37% of patients were women, 52% were white, 45% were Asian, and 1.3% were Hispanic or Latino.  Thirty-one percent of patients were enrolled at sites in North America, Western Europe, or Australia. ECOG performance was 0 in 32% of patients, 1 in 60% of patients, and 2 in 8% of patients. Median age was 61 years. More patients (62%) had colon cancer than rectal cancer (38%). Most patients (74%) had not received prior bevacizumab.
The key efficacy analysis for Study 2 demonstrated that Vectibix was statistically significantly noninferior to cetuximab for OS.
The efficacy results for Study 2 are presented in Table 3 and Figure 1.
Table 3:  Results in Previously Treated Wild-type KRAS mCRC (Study 2) 

Wild-type KRAS Population Vectibix
(n = 499)a
Cetuximab
(n = 500)a
OS
Number of OS events (%) 383 (76.8) 392 (78.4)
Median (months) (95% CI) 10.4 (9.4, 11.6) 10.0 (9.3, 11.0)
Hazard ratio (95% CI) 0.97 (0.84, 1.11)
PFS
Median (months) (95% CI) 4.1 (3.2, 4.8) 4.4 (3.2, 4.8)
Hazard ratio (95% CI) 1.00 (0.88, 1.14)
ORR
% (95% CI) 22% (18%, 26%) 19% (16%, 23%)
a Modified intent-to-treat population that included all patients who received at least one dose of therapy
Figure 1:  Kaplan-Meier Plot of Overall Survival in Patients with Wild-type KRAS mCRC (Study 2)
14.2 First-line in Combination with FOLFOX Chemotherapy
Study 3
Study 3 was a multicenter, open-label trial that randomized (1:1) patients with mCRC who were previously untreated in the metastatic setting and who had received no prior oxaliplatin to receive Vectibix every 14 days in combination with FOLFOX or to FOLFOX alone every 14 days. Vectibix was administered at 6 mg/kg over 60 minutes prior to administration of chemotherapy. The FOLFOX regimen consisted of oxaliplatin 85 mg per m2 IV infusion over 120 minutes and leucovorin (dl-racemic) 200 mg per m2 intravenous infusion over 120 minutes at the same time on day 1 using a Y-line, followed on day 1 by 5-FU 400 mg per m2 intravenous bolus.  The 5FU bolus was followed by a continuous infusion of 5-FU 600 mg per m2 over 22 hours.  On day 2, patients received leucovorin 200 mg per m2 followed by the bolus dose (400 mg per m2) and continuous infusion of 5FU (600 mg per m2) over 22 hours.  Study 3 excluded patients with known central nervous system metastases, clinically significant cardiac disease, interstitial lung disease, or active inflammatory bowel disease. The prespecified major efficacy measure was PFS in patients (n = 656) with wild-type KRAS mCRC as assessed by a blinded independent central review of imaging. Other key efficacy measures included OS and ORR.
In Study 3, in the wild-type KRAS group, 64% of patients were men, 92% white, 2% black, and 4% Hispanic or Latino.  Sixty-six percent of patients had colon cancer and 34% had rectal cancer. ECOG performance was 0 in 56% of patients, 1 in 38% of patients, and 2 in 6% of patients. Median age was 61.5 years.
The efficacy results in Study 3 in patients with wild-type KRAS mCRC are presented in Table 4 below. 
Table 4:  Results in Patients with Wild-type KRAS mCRC (Study 3)

Primary Analysis
Vectibix
plus FOLFOX
FOLFOX Alone
Wild-type KRAS population (n = 325)a (n = 331)a
PFS
Median (months) (95% CI) 9.6 (9.2, 11.1) 8.0 (7.5, 9.3)
Hazard ratio (95% CI)
p-value
0.80 (0.66, 0.97)
p = 0.02
ORR
% (95% CI) 54% (48%, 59%) 47% (41%, 52%)
a Intent-to-treat population
KRAS-Mutant Subgroup
In Study 3, among patients with KRAS-mutant tumors, median PFS was 7.3 months (95% CI: 6.3, 8.0) among 221 patients receiving Vectibix plus FOLFOX versus 8.8 months (95% CI: 7.7, 9.4) among patients who received FOLFOX alone (HR = 1.29, 95% CI: 1.04, 1.62). Median OS was 15.5 months (95% CI: 13.1, 17.6) among patients receiving Vectibix plus FOLFOX versus 19.3 months (95% CI: 16.5, 21.8) among patients who received FOLFOX alone (HR = 1.24, 95% CI: 0.98, 1.57).
Exploratory Analysis of OS
An exploratory analysis of OS with updated information based on events in 82% of patients with wild-type KRAS mCRC estimated the treatment effect of Vectibix plus FOLFOX compared with FOLFOX alone on OS (Figure 2). Median OS among 325 patients with wild-type KRAS mCRC who received Vectibix plus FOLFOX was 23.8 months (95% CI: 20.0, 27.7) versus 19.4 months (95% CI: 17.4, 22.6) among 331 patients who received FOLFOX alone (HR = 0.83, 95% CI: 0.70, 0.98).
Figure 2:  Kaplan-Meier Plot of Overall Survival in Patients with Wild-type KRAS mCRC (Study 3)
16 HOW SUPPLIED/STORAGE AND HANDLING
Vectibix is supplied as a sterile, colorless, preservative-free solution containing 20 mg/mL Vectibix (panitumumab) in a single-use vial.
Vectibix is provided as one vial per carton.
Each 5 mL single-use vial contains 100 mg of panitumumab in 5 mL (20 mg/mL) (NDC 55513-954-01).
Each 10 mL single-use vial contains 200 mg of panitumumab in 10 mL (20 mg/mL) (NDC 55513-955-01).
Each 20 mL single-use vial contains 400 mg of panitumumab in 20 mL (20 mg/mL) (NDC 55513-956-01).
Store vials in the original carton under refrigeration at 2º to 8ºC (36º to 46ºF) until time of use. Protect from direct sunlight. DO NOT FREEZE.  Since Vectibix does not contain preservatives, any unused portion remaining in the vial must be discarded.
The diluted infusion solution of Vectibix should be used within 6 hours of preparation if stored at room temperature, or within 24 hours of dilution if stored at 2° to 8°C (36º to 46ºF). DO NOT FREEZE.
17 PATIENT COUNSELING INFORMATION
Advise patients to contact a healthcare professional for any of the following:
Skin and ocular/visual changes [see Boxed Warning, Dosage and Administration (2.3), Warnings and Precautions (5.1, 5.8), and Adverse Reactions (6.1, 6.3)]
Signs and symptoms of infusion reactions, including fever, chills, or breathing problems [see Dosage and Administration (2.3), Warnings and Precautions (5.4), and Adverse Reactions (6.1, 6.3)]
Diarrhea and dehydration [see Warnings and Precautions (5.5)]
Persistent or recurrent coughing, wheezing, dyspnea, or new-onset facial swelling [see Warnings and Precautions (5.6) and Adverse Reactions (6.1)]
Pregnancy or nursing [see Use in Specific Populations (8.1, 8.3)]
Advise patients of the need for:
Periodic monitoring of electrolytes [see Warnings and Precautions (5.3)]
Limitation of sun exposure (use sunscreen, wear hats) while receiving Vectibix and for 2 months after the last dose of Vectibix therapy [see Warnings and Precautions (5.7)]
Adequate contraception in both males and females while receiving Vectibix and for 6 months after the last dose of Vectibix therapy [see Use in Specific Populations (8.1, 8.3)]
帕尼单抗也在进行单用或合用其他抗肿瘤药物治疗各类型肿瘤
目前,帕尼单抗也在进行单用或合用其他抗肿瘤药物治疗各类型肿瘤,包括结肠直肠癌、肺癌和肾癌等的多项临床试验。另外,帕尼单抗亦在进行合用化疗药物和Genentech有限公司的结肠直肠癌治疗药物倍伐单抗(Bevacizumab,Avastin)治疗早期阶段结肠直肠癌患者的临床研究。
帕尼单抗属免疫球蛋白IgG2型单克隆抗体,它能以高度亲和性与表皮生长因子受体结合。帕尼单抗是应用Abgenix公司的XenoMouse技术生产的,这种技术能用来制造一种不含鼠源性蛋白的全人源化单克隆抗体。由于机体的免疫系统可自嵌合型抗体中识别出鼠蛋白,因此会由此引发免疫响应并以输注反应和变态反应等形式表现出来。开发不含鼠蛋白的全人源化单克隆抗体的目的就在于,保留嵌合型抗体疗效的基础上使这类免疫响应潜力降至最低程度。
表皮生长因子受体虽能帮助调控机体许多不同类型资本的正常生长,但它也会刺激肿瘤细胞的生长。实际上,许多类型的肿瘤细胞存活都需经由表皮生长因子受体介导的信号传导。表皮生长因子受体位于肿瘤细胞表面,它可因机体中天然发生蛋白如表皮生长因子和α-转化生长因子等与之结合而被激活。后者首先表现为受体形状变化,而后即会触发刺激肿瘤细胞生长的内在细胞信号传导过程。帕尼单抗能够结合至表皮生长因子受体,由此通过阻止表皮生长因子和α-转化生长因子等天然配基与之结合而干扰可致刺激肿瘤细胞生长并使这些细胞存活的信号传导过程。
Amgen有限公司宣称,因更少不良反应和更为便利的剂量方案,帕尼单抗具有优于类似药物西妥单抗(Cetuximab,Er鄄bitux)的潜力。业内人士认为,基于倍伐单抗和西妥单抗在不应性结肠直肠癌患者中显现出的协同活性,若Ⅲ期临床试验能够证实帕尼单抗加至氟尿嘧啶-亚叶酸-奥沙利铂和倍伐单抗方案中一线治疗结肠直肠癌有益,那么帕尼单抗就能凭借这更为便利的剂量方案(每两周1次对西妥单抗的每周1次用药)而将成为临床标准一线疗法。
研究还进一步揭示,帕尼单抗较西妥单抗的具有更多特性,包括更长的半衰期、更高的受体亲和性和更好的免疫耐受性等。帕尼单抗的药动学性质也提示,其用药不必要像西妥单抗那样,必须首先给予负荷剂量。帕尼单抗和西妥单抗分属全人源化和嵌合型鼠-人抗体,故帕尼单抗的耐受性亦应优于西妥单抗。 
-------------------------------------------------
注:以下产品不同规格和不同价格,购买以咨询为准!
-------------------------------------------------
上市国家:美国
原产地英文商品名:
VECTIBIX 400mg/20ml/Vial
原产地英文药品名:
PANITUMUMAB
中文参考商品译名:
维克替比 400毫克/20毫升/瓶
中文参考药品译名:
帕尼单抗
生产厂家中文参考译名:
安进公司
生产厂家英文名:
Amgen
--------------------------------------------------
上市国家:美国
原产地英文商品名:
VECTIBIX 100mg/5ml/Vial
原产地英文药品名:
PANITUMUMAB
中文参考商品译名:
维克替比 100毫克/5毫升/瓶
中文参考药品译名:
帕尼单抗
生产厂家中文参考译名:
安进公司
生产厂家英文名:
Amgen
------------------------------------------------------
上市国家:美国
原产地英文商品名:
VECTIBIX 100mg/10ml/Vial
原产地英文药品名:
PANITUMUMAB
中文参考商品译名:
维克替比 100毫克/10毫升/瓶
中文参考药品译名:
帕尼单抗
生产厂家中文参考译名:
安进公司
生产厂家英文名:
Amgen
------------------------------------------------------
上市国家:德国
原产地英文商品名:
VECTIBIX 100mg/5ml/Vial
原产地英文药品名:
PANITUMUMAB
中文参考商品译名:
VECTIBIX 100毫克/5毫升/瓶
中文参考药品译名:
帕尼单抗
生产厂家中文参考译名:
安进公司
生产厂家英文名:
Amgen
------------------------------------------------------
上市国家:德国
原产地英文商品名:
VECTIBIX 400mg/20ml/Vial
原产地英文药品名:
PANITUMUMAB
中文参考商品译名:
VECTIBIX 400毫克/20毫升/瓶
中文参考药品译名:
帕尼单抗
生产厂家中文参考译名:
安进公司
生产厂家英文名:
Amgen

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维克替比(帕尼单抗注射剂)|Vectibix (Panitumumab Injection)
维克替比(帕尼单抗注射剂)|Vectibix(Panitumumab)
 

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· ERBITUX Injection(西妥...
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· 雷莫芦单抗注射剂|CYRAM...
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