1 INDICATIONS AND USAGE ZALTRAP, in combination with fluorouracil, leucovorin, irinotecan-(FOLFIRI), is indicated for the treatment of patients with metastatic colorectal cancer (mCRC) that is resistant to or has progressed following an oxaliplatin-containing regimen.

ZALTRAP, a vascular endothelial growth factor inhibitor, in combination with fluorouracil, leucovorin, irinotecan (FOLFIRI), is indicated for the treatment of patients with metastatic colorectal cancer that is resistant to or has progressed following an oxaliplatin-containing regimen.

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6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: Hemorrhage [see Warnings and Precautions (5.1) ] Gastrointestinal Perforation [see Warnings and Precautions (5.2) ] Impaired Wound Healing [see Warnings and Precautions (5.3) ] Fistula Formation [see Warnings and Precautions (5.4) ] Hypertension [see Warnings and Precautions (5.5) ] Arterial Thromboembolic Events [see Warnings and Precautions (5.6) ] Proteinuria [see Warnings and Precautions (5.7) ] Neutropenia and Neutropenic Complications [see Warnings and Precautions (5.8) ] Diarrhea and Dehydration [see Warnings and Precautions (5.9) ] Reversible Posterior Leukoencephalopathy Syndrome [see Warnings and Precautions (5.10) ] Most common adverse reactions (≥20% incidence) were leukopenia, diarrhea, neutropenia, proteinuria, AST increased, stomatitis, fatigue, thrombocytopenia, ALT increased, hypertension, weight decreased, decreased appetite, epistaxis, abdominal pain, dysphonia, serum creatinine increased, and headache.

( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact sanofi-aventis at 1-800-633-1610 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

The safety of ZALTRAP in combination with FOLFIRI was evaluated in VELOUR (EFC102621) [see Clinical Studies (14) ].

Patients received ZALTRAP 4 mg per kg (N=611) or placebo (N=605) intravenously every two weeks (one cycle) in combination with FOLFIRI.

Patients received a median of 9 cycles of ZALTRAP/FOLFIRI.

The most common Grade 3–4 adverse reactions (≥5%) in the ZALTRAP/FOLFIRI arm were neutropenia, diarrhea, hypertension, leukopenia, stomatitis, fatigue, proteinuria, and asthenia.

The most frequent adverse reactions leading to permanent discontinuation in ≥1% of patients treated with ZALTRAP/FOLFIRI regimen were asthenia/fatigue, infections, diarrhea, dehydration, hypertension, stomatitis, venous thromboembolic events, neutropenia, and proteinuria.

The ZALTRAP dose was reduced and/or omitted in 17% of patients.

Cycle delays >7 days occurred in 60% of patients treated with ZALTRAP/FOLFIRI.

The most common adverse reactions (≥20%) in the ZALTRAP/FOLFIRI arm were leukopenia, diarrhea, neutropenia, proteinuria, AST increased, stomatitis, fatigue, thrombocytopenia, ALT increased, hypertension, weight decreased, decreased appetite, epistaxis, abdominal pain, dysphonia, serum creatinine increased, and headache.

Adverse reactions and laboratory abnormalities that occurred in ≥5% (all grades) of patients receiving ZALTRAP in combination with FOLFIRI and which occurred at ≥2% higher frequency in patients who received ZALTRAP/FOLFIRI compared to those who received placebo/FOLFIRI in VELOUR are shown in Table 1.

VELOUR was not designed to demonstrate a statistically significant difference in adverse reaction rates for ZALTRAP/FOLFIRI as compared to placebo/FOLFIRI for any adverse reactions listed below.

Table 1: Selected Adverse Reactions and Laboratory Findings in VELOUR Primary System Organ Class Preferred Term ZALTRAP/ FOLFIRI (N=611) Placebo/ FOLFIRI (N=605) All grades (%) Grades 3–4 (%) All grades (%) Grades 3–4 (%) Note: Adverse Reactions are reported using MedDRA version 13.1 and graded using NCI CTC version 3.0 Blood and lymphatic system disorders Leukopenia 78 16 72 12 Neutropenia 67 37 57 30 Thrombocytopenia 48 3 35 2 Gastrointestinal disorders Diarrhea 69 19 57 8 Stomatitis 50 13 33 5 Abdominal Pain 27 4 24 2 Abdominal Pain Upper 11 1 8 1 Hemorrhoids 6 0 2 0 Rectal Hemorrhage 5 0.7 2 0.5 Proctalgia 5 0.3 2 0.3 Investigations AST increased 62 3 54 2 ALT increased 50 3 39 2 Weight decreased 32 3 14 0.8 Renal and urinary disorders Proteinuria Compilation of clinical and laboratory data 62 8 41 1 Serum creatinine increased 23 0 19 0.5 General disorders and administration site conditions Fatigue 48 13 39 8 Asthenia 18 5 13 3 Vascular disorders Hypertension 41 19 11 1.5 Metabolism and nutrition disorders Decreased Appetite 32 3 24 2 Dehydration 9 4 3 1 Respiratory, thoracic and mediastinal disorders Epistaxis 28 0.2 7 0 Dysphonia 25 0.5 3 0 Dyspnea 12 0.8 9 0.8 Oropharyngeal Pain 8 0.2 3 0 Rhinorrhea 6 0 2 0 Nervous system disorders Headache 22 2 9 0.3 Skin and subcutaneous tissue disorders Palmar-Plantar Erythrodysesthesia Syndrome 11 3 4 0.5 Skin Hyperpigmentation 8 0 3 0 Infections Urinary Tract Infection 9 0.8 6 0.8 Infections occurred at a higher frequency in patients receiving ZALTRAP/FOLFIRI (46%, all grades; 12%, Grade 3–4) than in patients receiving placebo/FOLFIRI (33%, all grades; 7%, Grade 3–4), including urinary tract infection, nasopharyngitis, upper respiratory tract infection, pneumonia, catheter site infection, and tooth infection.

In patients with mCRC, severe hypersensitivity reactions have been reported with ZALTRAP/FOLFIRI (0.3%) and placebo/FOLFIRI (0.5%).

In patients with mCRC, venous thromboembolic events (VTE), consisting primarily of deep venous thrombosis and pulmonary embolism, occurred in 9% of patients treated with ZALTRAP/FOLFIRI and 7% of patients treated with placebo/FOLFIRI.

Grade 3–4 VTE occurred in 8% of patients treated with ZALTRAP/FOLFIRI and in 6% of patients treated with placebo/FOLFIRI.

Pulmonary embolism occurred in 5% of patients treated with ZALTRAP/FOLFIRI and 3.4% of patients treated with placebo/FOLFIRI.

6.2 Immunogenicity As with all therapeutic proteins, there is a potential for immunogenicity.

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 in the studies described below with the incidence of antibodies in other studies or to other products may be misleading.

In patients with various cancers across 15 studies, 1.4% (41/2862) of patients tested positive for antiproduct antibody (APA) at baseline.

The incidence of APA development was 3.1% (53/1687) in patients receiving intravenous ziv-aflibercept and 1.7% (19/1134) in patients receiving placebo.

Among patients who tested positive for APA and had sufficient samples for further testing, neutralizing antibodies were detected in 17 of 48 ziv-aflibercept-treated patients and in 2 of 40 patients receiving placebo.

The mean free ziv-aflibercept trough concentrations were lower in patients with positive neutralizing antibodies than in the overall population.

The impact of neutralizing antibodies on efficacy and safety could not be assessed based on limited available data.

6.3 Postmarketing Experience The following adverse reactions have been identified during postapproval use of ZALTRAP.

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.

Musculoskeletal and connective tissue disorders : Osteonecrosis of the jaw Cardiac disorders : Cardiac failure, ejection fraction decreased Vascular disorders : Arterial (including aortic) aneurysms, dissections, and rupture