Vandetanib

12.1 Mechanism of Action In vitro studies have shown that vandetanib inhibits the tyrosine kinase activity of the EGFR and VEGFR families, RET, BRK, TIE2, and members of the EPH receptor and Src kinase families. These receptor tyrosine kinases are involved in both normal cellular function and pathologic processes such as oncogenesis, metastasis, tumor angiogenesis, and maintenance of the tumor microenvironment. In addition, the N-desmethyl metabolite of the drug, representing 7 to 17.1% of vandetanib exposure, has similar inhibitory activity to the parent compound for VEGF receptors (KDR and Flt-1) and EGFR. In vitro , vandetanib inhibited epidermal growth factor (EGF)-stimulated receptor tyrosine kinase phosphorylation in tumor cells and endothelial cells and VEGF-stimulated tyrosine kinase phosphorylation in endothelial cells. In vivo , vandetanib administration reduced tumor cell-induced angiogenesis, tumor vessel permeability, and inhibited tumor growth and metastasis in mouse models of cancer.

1 INDICATIONS AND USAGE CAPRELSA is indicated for the treatment of symptomatic or progressive medullary thyroid cancer in patients with unresectable locally advanced or metastatic disease. Use CAPRELSA in patients with indolent, asymptomatic or slowly progressing disease only after careful consideration of the treatment related risks of CAPRELSA. CAPRELSA is a kinase inhibitor indicated for the treatment of symptomatic or progressive medullary thyroid cancer in patients with unresectable locally advanced or metastatic disease. ( 1 ) Use CAPRELSA in patients with indolent, asymptomatic or slowly progressing disease only after careful consideration of the treatment related risks of CAPRELSA. ( 1 )

2 DOSAGE AND ADMINISTRATION The recommended dose of CAPRELSA is 300 mg taken orally once daily until disease progression or unacceptable toxicity occurs. CAPRELSA may be taken with or without food. Do not take a missed dose within 12 hours of the next dose. Do not crush CAPRELSA tablets. The tablets can be dispersed in 2 ounces of water by stirring for approximately 10 minutes (will not completely dissolve). Do not use other liquids for dispersion. Swallow immediately after dispersion. Mix any remaining residue with 4 additional ounces of water and swallow. The dispersion can also be administered through nasogastric or gastrostomy tubes. 300 mg once daily. ( 2 ) CAPRELSA may be taken with or without food. ( 2 ) Dosage reduction may be necessary in the event of severe toxicities or QTc interval prolongation. ( 2.1 ) The starting dose is 200 mg in patients with moderate renal impairment. ( 2.1 ) 2.1 Dosage Adjustment For Adverse Reactions The 300 mg daily dose can be reduced to 200 mg (two 100 mg tablets) and then to 100 mg for Common Terminology Criteria for Adverse Events (CTCAE) Grade 3 or greater toxicities. Interrupt CAPRELSA for the following: Corrected QT interval, Fridericia (QTcF) greater than 500 ms: Resume at a reduced dose when the QTcF returns to less than 450 ms. CTCAE Grade 3 or greater toxicity: Resume at a reduced dose when the toxicity resolves or improves to CTCAE Grade 1. For recurrent toxicities, reduce the dose of CAPRELSA to 100 mg after resolution or improvement to CTCAE Grade 1 severity, if continued treatment is warranted. Adverse events including QT interval prolongation should be monitored closely as they may not resolve fully until approximately three plasma half-lives of the drug. Monitor appropriately [see Warnings and Precautions (5.1) , (5.2) , (5.3) , (5.4) , (5.5) , (5.6) , (5.7) , and (5.9) ] . For Patients with Renal Impairment Reduce the starting dose to 200 mg in patients with moderate (creatinine clearance ≥30 to <50 mL/min) renal impairment [see Warnings and Precautions (5.12) and Use in Specific Populations (8.6) ] . For Patients with Hepatic Impairment CAPRELSA is not recommended for use in patients with moderate and severe hepatic impairment [see Use in Specific Populations (8.7) ] .

6 ADVERSE REACTIONS The following serious adverse reactions are discussed elsewhere in the label: QT Prolongation and Torsades de Pointes [see Boxed Warning , Warnings and Precautions (5.1) ] Severe Skin Reactions [see Warnings and Precautions (5.2) ] Interstitial Lung Disease [see Warnings and Precautions (5.3) ] Ischemic Cerebrovascular Events [see Warnings and Precautions (5.4) ] Hemorrhage [see Warnings and Precautions (5.5) ] Heart Failure [see Warnings and Precautions (5.6) ] Diarrhea [see Warnings and Precautions (5.7) ] Hypothyroidism [see Warnings and Precautions (5.8) ] Hypertension [see Warnings and Precautions (5.9) ] Reversible Posterior Leukoencephalopathy Syndrome [see Warnings and Precautions (5.10) ] Renal Failure [see Warnings and Precautions (5.12) ] Embryo-Fetal Toxicity [see Warnings and Precautions (5.15) ] Osteonecrosis [see Warnings and Precautions (5.16) ] The most common adverse drug reactions (>20%) seen with CAPRELSA and with a between-arm difference of ≥5 % have been diarrhea/colitis, rash, acneiform dermatitis, hypertension, nausea, headache, upper respiratory tract infections, decreased appetite and abdominal pain. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, Contact Sanofi Genzyme 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. Patients with unresectable locally advanced or metastatic medullary thyroid cancer were treated with CAPRELSA 300 mg (n=231) or Placebo (n=99). The population exposed to CAPRELSA was 58% male, 94% white, and had a median age of 50 years. The data described below reflect a median exposure to CAPRELSA for 607 days. The most commonly reported adverse drug reactions which occurred in >20% of CAPRELSA-treated patients and with a between-arm difference of ≥5% included, in order of decreasing frequency: diarrhea/colitis, rash, acneiform dermatitis, hypertension, nausea, headache, upper respiratory tract infection, decreased appetite, and abdominal pain. Among CAPRELSA-treated patients, dose interruption occurred in 109 (47%) and dose reduction occurred in 83 (36%). Adverse reactions led to study treatment discontinuation in 28 of 231 patients (12%) receiving CAPRELSA and in 3 of 99 patients (3.0%) receiving placebo. Adverse reactions leading to permanent discontinuation in 2 or more (≥0.9%) patients treated with CAPRELSA were: asthenia (1.7%), rash (1.7%), diarrhea (0.9%), fatigue (0.9%), pyrexia (0.9%), elevated creatinine (0.9%), QT prolongation (0.9%), and hypertension (0.9%). Table 1: Per-Patient Incidence of Selected Adverse Reactions Occurring at a Higher Incidence in CAPRELSA-Treated Patients During Randomized Treatment (Between-Arm Difference of ≥5% [All Grades] CTCAE version 3 was used to grade adverse events. ) System Organ Class CAPRELSA 300 mg Placebo Preferred Term N=231 N=99 All Grades (%) Grade 3 or 4 (%) All Grades (%) Grade 3 or 4 (%) Gastrointestinal Disorders Diarrhea/Colitis 57 11 27 2 Nausea 33 1 16 0 Abdominal Pain Includes abdominal pain, abdominal pain upper, lower abdominal pain, and abdominal discomfort. 21 3 11 0 Vomiting 15 1 7 0 Dyspepsia 11 0 4 0 Dry Mouth 9 0 3 0 Skin and Cutaneous Disorders Rash Includes rash, rash (erythematous, generalized, macular, maculopapular, papular, pruritic, and exfoliative), dermatitis, dermatitis bullous, generalized erythema, and eczema. 53 5 12 0 Dermatitis Acneiform/Acne 35 1 7 0 Dry Skin 15 0 5 0 Photosensitivity Reaction 13 2 0 0 Pruritus 11 1 4 0 Nail abnormalities Includes nail disorder, nail bed inflammation, nail bed tenderness, paronychia, nail bed infection, and nail infection. 9 0 0 0 Alopecia 8 N/A 0 N/A Vascular Disorders Hypertension/Hypertensive Crisis/Accelerated Hypertension 33 9 5 1 Nervous System Disorders Headache 26 1 9 0 Dysgeusia 8 0 3 0 General Disorders Fatigue Included in Table 1 due to the increased incidence of severe fatigue in the CAPRELSA group compared to the placebo group. 24 6 23 1 Infections Upper Respiratory Tract Infections Includes laryngitis, nasopharyngitis, pharyngitis, sinusitis, upper respiratory tract infection, acute sinusitis, rhinitis, and tracheitis. 23 0 16 0 Metabolic and Nutritional Disorders Decreased Appetite 21 4 12 0 Hypocalcemia 11 2 3 0 Investigations ECG QT Prolonged 69% had QT prolongation >450 ms and 7% had QT prolongation >500 ms by ECG using Fridericia correction. 14 8 1 1 Eye Disorders Corneal Abnormalities Includes corneal edema, corneal opacity, corneal dystrophy, corneal pigmentation, keratopathy, arcus lipoides, corneal deposits, and acquired corneal dystrophy. 13 0 1 0 Blurred Vision 9 0 1 0 Renal Disorders Proteinuria 10 0 2 0 Psychiatric Disorders Depression 10 2 3 0 Endocrine Disorders Hypothyroidism 6 0 0 0 Musculoskel

7 DRUG INTERACTIONS Avoid the use of strong CYP3A4 inducers because they may decrease CAPRELSA exposure. ( 7.1 ) Avoid the use of agents that prolong the QT interval. ( 5.11 ) 7.1 Effect of CYP3A4 Inducers on CAPRELSA Rifampicin, a strong CYP3A4 inducer, decreased vandetanib plasma concentrations. Avoid concomitant use of known strong CYP3A4 inducers during CAPRELSA therapy. Avoid concomitant use of St. John's wort because it can decrease vandetanib exposure unpredictably [see Clinical Pharmacology (12.3) ] . 7.2 Effect of CAPRELSA on OCT2 Transporter CAPRELSA increased plasma concentrations of metformin that is transported by the organic cation transporter type 2 (OCT2). Use caution and closely monitor for toxicities when administering CAPRELSA with drugs that are transported by OCT2 [see Clinical Pharmacology (12.3) ] . 7.3 Effect of CAPRELSA on Digoxin CAPRELSA increased plasma concentrations of digoxin. Use caution and closely monitor for toxicities when administering CAPRELSA with digoxin [see Clinical Pharmacology (12.3) ] . 7.4 Drugs that Prolong the QT Interval Avoid concomitant use of CAPRELSA with agents that may prolong the QT interval [see Warnings and Precautions (5.11) ] .