Oxaliplatin

Oxaliplatin injection, in combination with infusional fluorouracil and leucovorin, is indicated for: adjuvant treatment of stage III colon cancer in patients who have undergone complete resection of the primary tumor. treatment of advanced colorectal cancer. Oxaliplatin is a platinum-based drug used in combination with infusional fluorouracil and leucovorin, which is indicated for: adjuvant treatment of stage III colon cancer in patients who have undergone complete resection of the primary tumor. ( 1 ) treatment of advanced colorectal cancer. ( 1 )

Injection: 50 mg (5 mg/mL), 100 mg (5 mg/mL) or 200 mg (5 mg/mL) clear, colorless solution in a single-dose vial. Injection: 50 mg (5 mg/mL), 100 mg (5 mg/mL) or 200 mg (5 mg/mL) in a single-dose vial ( 3 )

Oxaliplatin is contraindicated in patients with a history of a hypersensitivity reaction to oxaliplatin or other platinum-based drugs. Reactions have included anaphylaxis [see Warnings and Precautions (5.1) ] . History of hypersensitivity reaction to oxaliplatin or other platinum-based drugs. ( 4 , 5.1 )

Peripheral Sensory Neuropathy : Acute and delayed neuropathy can occur. Avoid topical application of ice. Reduce the dose or permanently discontinue oxaliplatin as recommended. ( 5.2 ) Severe Myelosuppression : Delay oxaliplatin until neutrophils are greater than or equal to 1.5 × 10 9 /L and platelets are greater than or equal to 75 × 10 9 /L. Withhold oxaliplatin for sepsis or septic shock. Dose reduce after recovery from grade 4 neutropenia, febrile neutropenia, or grade 3 to 4 thrombocytopenia as recommended. ( 5.3 ) Posterior Reversible Encephalopathy Syndrome (PRES) : Permanently discontinue oxaliplatin in patients who develop PRES. ( 5.4 ) Pulmonary Toxicity : Withhold oxaliplatin until investigation excludes interstitial lung disease or pulmonary fibrosis. ( 5.5 ) Hepatotoxicity : Monitor liver function tests at baseline, before each subsequent cycle, and as clinically indicated. ( 5.6 ) QT Interval Prolongation : Avoid in patients with congenital long QT syndrome. Monitor electrocardiograms in patients with congestive heart failure, bradyarrhythmias, and electrolyte abnormalities, and in patients taking drugs known to prolong the QT interval. Correct electrolyte abnormalities prior to initiating oxaliplatin and periodically during treatment. ( 5.7 ) Rhabdomyolysis : Permanently discontinue oxaliplatin if rhabdomyolysis occurs. ( 5.8 ) Hemorrhage : Increase frequency of monitoring in patients who are receiving oxaliplatin with fluorouracil/leucovorin and oral anticoagulants ( 5.9 ) Embryo-Fetal Toxicity : Can cause fetal harm. Advise pregnant women of the potential risk to a fetus. Advise males and females of reproductive potential to use an effective method of contraception. ( 5.10 , 8.1 , 8.3 )

5.1 Hypersensitivity Reactions Serious and fatal hypersensitivity reactions, including anaphylaxis, can occur with oxaliplatin within minutes of administration and during any cycle. Grade 3 to 4 hypersensitivity reactions, including anaphylaxis, occurred in 2% to 3% of patients with colon cancer who received oxaliplatin. Hypersensitivity reactions, including rash, urticaria, erythema, pruritus, and rarely, bronchospasm and hypotension, were similar in nature and severity to those reported with other platinum-based drugs. Oxaliplatin is contraindicated in patients with hypersensitivity reactions to platinum-based drugs [see Contraindications (4) ] . Immediately and permanently discontinue oxaliplatin for hypersensitivity reactions and administer appropriate treatment for management of hypersensitivity reactions.

5.2 Peripheral Sensory Neuropathy Oxaliplatin can cause acute and delayed neuropathy. Reduce the dose or permanently discontinue oxaliplatin for persistent neurosensory reactions based on the severity of the adverse reaction [see Dosage and Administration (2.2) ] . Acute Neuropathy Acute neuropathy typically presents as a reversible, primarily peripheral sensory neuropathy that occurs within hours or 2 days following a dose, resolves within 14 days, and frequently recurs with further dosing. The symptoms can be precipitated or exacerbated by exposure to cold temperature or cold objects and they usually present as transient paresthesia, dysesthesia and hypoesthesia in the hands, feet, perioral area, or throat. Jaw spasm, abnormal tongue sensation, dysarthria, eye pain, and a feeling of chest pressure have also been observed. The acute, reversible pattern of sensory neuropathy was observed in about 56% of patients who received oxaliplatin with fluorouracil/leucovorin. In any individual cycle, acute neuropathy occurred in approximately 30% of patients. For grade 3 peripheral sensory neuropathy, the median time to onset was 9 cycles for adjuvant treatment and 6 cycles for previously treated advanced colorectal cancer. An acute syndrome of pharyngolaryngeal dysesthesia occurred in 1% to 2% (grade 3 to 4) of patients previously untreated for advanced colorectal cancer. Subjective sensations of dysphagia or dyspnea, without any laryngospasm or bronchospasm (no stridor or wheezing) occurred in patients previously treated for advanced colorectal cancer. Avoid topical application of ice for mucositis prophylaxis or other conditions, because cold temperature can exacerbate acute neurological symptoms . Delayed Neuropathy Delayed neuropathy typically presents as a persistent (greater than 14 days), primarily peripheral sensory neuropathy that is usually characterized by paresthesias, dysesthesias, and hypoesthesias, but may also include deficits in proprioception that can interfere with daily activities (e.g., writing, buttoning, swallowing, and difficulty walking from impaired proprioception). These forms of neuropathy occurred in 48% of patients receiving oxaliplatin. Delayed neuropathy can occur without any prior acute neuropathy. Most patients (80%) who developed grade 3 persistent neuropathy progressed from prior grade 1 or 2 reactions. These symptoms may improve in some patients upon discontinuation of oxaliplatin. Adjuvant treatment In the adjuvant treatment trial, neuropathy was graded using NCI CTC, version 1 as summarized in Table 3. Table 3: Grading for Neuropathy in Adjuvant Treatment Trial Grade Definition 0 No change or none 1 Mild paresthesias, loss of deep tendon reflexes 2 Mild or moderate objective sensory loss, moderate paresthesias 3 Severe objective sensory loss or paresthesias that interfere with function 4 Not applicable Peripheral sensory neuropathy occurred in 92% of patients (all grades), including 13% of patients (grade 3) who received oxaliplatin with fluorouracil/leucovorin. At the 28-day follow-up after the last treatment cycle, 60% of patients had any grade (grade 1=40%, grade 2=16%, grade 3=5%) peripheral sensory neuropathy, decreasing to 39% at 6 months of follow-up (grade 1=31%, grade 2=7%, grade 3=1%) and 21% at 18 months of follow-up (grade 1=17%, grade 2=3%, grade 3=1%). Advanced colorectal cancer In the advanced colorectal cancer trials, neuropathy was graded using the neurotoxicity scale summarized in Table 4. Table 4: Grading for Neuropathy in Advanced Colorectal Cancer Trials Grade Definition 1 Resolved and did not interfere with functioning 2 Interfered with function but not daily activities 3 Pain or functional impairment that interfered with daily activities 4 Persistent impairment that is disabling or life-threatening Neuropathy occurred in 82% (all grades) of patients previously untreated for advanced colorectal cancer, including 19% grade 3 to 4; and in 74% (all grades) of patients previously treated for advanced colorectal cancer, including 7% grade 3 to 4.

5.3 Severe Myelosuppression Grade 3 or 4 neutropenia occurred in 41% to 44% of patients with colorectal cancer who received oxaliplatin with fluorouracil/leucovorin. Sepsis, neutropenic sepsis and septic shock, including fatal outcomes, occurred in patients who received oxaliplatin [see Adverse Reactions (6.1 , 6.2 )] . Grade 3 or 4 thrombocytopenia occurred in 2% to 5% of patients with colorectal cancer who received oxaliplatin with fluorouracil/leucovorin. Monitor complete blood cell count at baseline, before each subsequent cycle and as clinically indicated . Delay oxaliplatin until neutrophils are greater than or equal to 1.5 × 10 9 /L and platelets are greater than or equal to 75 × 10 9 /L. Withhold oxaliplatin for sepsis or septic shock. Dose reduce oxaliplatin after recovery from grade 4 neutropenia, febrile neutropenia or grade 3 to 4 thrombocytopenia as recommended [see Dosage and Administration (2.2) ] .

5.4 Posterior Reversible Encephalopathy Syndrome PRES occurred in less than 0.1% of patients across clinical trials [see Adverse Reactions (6.1) ] . Signs and symptoms of PRES can include headache, altered mental functioning, seizures, abnormal vision from blurriness to blindness, associated or not with hypertension. Confirm the diagnosis of PRES with magnetic resonance imaging. […]

The following clinically significant adverse reactions are described elsewhere in labeling: Hypersensitivity Reactions [see Warnings and Precautions (5.1) ] Peripheral Sensory Neuropathy [see Warnings and Precautions (5.2) ] Severe Myelosuppression [see Warnings and Precautions (5.3) ] Reversible Posterior Leukoencephalopathy Syndrome [see Warnings and Precautions (5.4) ] Pulmonary Toxicity [see Warnings and Precautions (5.5) ] Hepatotoxicity [see Warnings and Precautions (5.6) ] QT Interval Prolongation and Ventricular Arrhythmias [see Warnings and Precautions (5.7) ] Rhabdomyolysis [see Warnings and Precautions (5.8) ] Hemorrhage [see Warnings and Precautions (5.9) ] Most common adverse reactions (incidence greater than or equal to 40%) were peripheral sensory neuropathy, neutropenia, thrombocytopenia, anemia, nausea, increase in transaminases and alkaline phosphatase, diarrhea, emesis, fatigue, and stomatitis. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Gland Pharma at 864-879-9994 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. More than 1100 patients with stage II or III colon cancer and more than 4,000 patients with advanced colorectal cancer were treated in trials with oxaliplatin. The most common adverse reactions in patients with stage II or III colon cancer receiving adjuvant treatment were peripheral sensory neuropathy, neutropenia, thrombocytopenia, anemia, nausea, increase in transaminases and alkaline phosphatase, diarrhea, emesis, fatigue and stomatitis. The most common adverse reactions in previously untreated and treated patients with advanced colorectal cancer were peripheral sensory neuropathies, fatigue, neutropenia, nausea, emesis, and diarrhea. Adjuvant Treatment The safety of oxaliplatin in combination with fluorouracil (FU)/leucovorin (LV) was evaluated in patients with stage II or III colon cancer, who had undergone complete resection of the primary tumor in the adjuvant treatment trial [see Clinical Studies (14.1) ]. Fatal adverse reactions in patients who received oxaliplatin in the combination arm included sepsis/neutropenic sepsis (n=3), intracerebral hemorrhage (n=2), and eosinophilic pneumonia (n=1). Thromboembolic events occurred in 6% (grade 3 to 4, 1.2%) of patients in the oxaliplatin arm. Grade 3 or 4 adverse reactions occurred in 70% of patients in the oxaliplatin arm. Grade 3 to 4 gastrointestinal bleeding occurred in 0.2% of patients. Febrile neutropenia occurred in 0.7% and documented infection with concomitant grade 3 to 4 neutropenia occurred in 1.1%. Discontinuation due to an adverse reaction occurred in 15% of the patients in the oxaliplatin arm. Tables 5, 6, and 7 summarize the adverse reactions reported in patients with colon cancer receiving adjuvant treatment. Table 5: Adverse Reactions Reported in Patients with Colon Cancer Receiving Adjuvant Treatment (greater than or equal to 5% of all patients and with greater than or equal to 1% grade 3 to 4) Adverse Reaction* Oxaliplatin + FU/LV N=1108 FU/LV N=1111 All Grades (%) Grade 3 to 4 (%) All Grades (%) Grade 3 to 4 (%) Neurology Peripheral Sensory Neuropathy 92 12 16 <1 Gastrointestinal Nausea 74 5 61 2 Diarrhea 56 11 48 7 Vomiting 47 6 24 1 Stomatitis 42 3 40 2 Anorexia 13 1 8 <1 Constitutional Symptoms/Pain Fatigue 44 4 38 1 Abdominal Pain 18 1 17 2 Dermatology/Skin Skin Disorder 32 2 36 2 Injection Site Reaction † 11 3 10 3 Fever/Infection Fever 27 1 12 1 Infection 25 4 25 3 Allergy/Immunology Allergic Reaction 10 3 2 <1 * Event coded in WHO-ART dictionary † Includes thrombosis related to the catheter Table 6: Adverse Reactions Reported in Patients with Colon Cancer Receiving Adjuvant Treatment (greater than or equal to 5% of all patients but with less than 1% grade 3 to 4) Adverse Reaction* Oxaliplatin + FU/LV N=1108 FU/LV N=1111 All Grades (%) All Grades (%) Dermatology/Skin Alopecia † 30 28 Gastrointestinal Constipation 22 19 Taste Perversion 12 8 Dyspepsia 8 5 Constitutional Symptoms/Pain/Ocular/Visual Epistaxis 16 12 Weight Increase 10 10 Conjunctivitis 9 15 Headache 7 5 Dyspnea 5 3 Pain 5 5 Abnormal Lacrimation 4 12 Neurology Sensory Disturbance 8 1 Allergy/Immunology Rhinitis 6 8 * Event coded in WHO-ART dictionary † No complete alopecia was reported In females, the following grade 3 to 4 adverse reactions were more frequent: diarrhea, fatigue, neutropenia, nausea, and vomiting. In patients greater than or equal to 65 years old, the incidence of grade 3 to 4 diarrhea and neutropenia was higher than in younger adults. Clinically relevant adverse reactions were reported in greater than or equal to 2% and less than 5% of the patients in the oxaliplatin arm (listed in decreasing order of frequency) were pain, leukopenia, weight loss, and cough. Table 7: Laboratory-Related Adverse Reactions Occurring in ≥5% of Patients with Colon Cancer Receiving Adjuvant Treatment Laboratory-Related Adverse Reaction Oxaliplatin with FU/LV N=1108 FU/LV N=1111 All Grades (%) Grades 3 to 4 (%) All Grades (%) Grades 3 to 4 (%) Hematology Neutropenia 79 41 40 5 Thrombocytopenia 77 2 19 <1 Anemia 76 1 67 <1 Hepatic Increased Transaminases 57 2 34 1 Increased Alkaline Phosphatase 42 <1 20 <1 Hyperbilirubinemia 20 4 20 5 Previously Untreated Advanced Colorectal Cancer The safety of oxaliplatin in combination with fluorouracil (FU)/leucovorin (LV) was evaluated in a randomized trial of patients with previously untreated advanced colorectal cancer [see Clinical Studies (14.2) ] . The adverse reaction profile in this trial was similar to that seen in other trials. Tables 8, 9, and 10 summarize the adverse reactions reported in the previously untreated advanced colorectal cancer trial. […]

7.1 Drugs that Prolong the QT Interval QT interval prolongation and ventricular arrhythmias can occur with oxaliplatin [see Warnings and Precautions (5.7) ] . Avoid coadministration of oxaliplatin with medicinal products with a known potential to prolong the QT interval.

7.2 Use with Nephrotoxic Products Because platinum-containing species are eliminated primarily through the kidney, clearance of these products may be decreased by coadministration of potentially nephrotoxic compounds [see Clinical Pharmacology (12.3) ] . Avoid coadministration of oxaliplatin with medicinal products known to cause nephrotoxicity.

7.3 Use with Anticoagulants Prolonged prothrombin time and INR occasionally associated with hemorrhage have been reported in patients who received oxaliplatin with fluorouracil/leucovorin while on anticoagulants [see Warnings and Precautions (5.9) , Adverse Reactions (6.2) ] . Increase frequency of monitoring in patients who are receiving oxaliplatin with fluorouracil/leucovorin and oral anticoagulants.

Females : Advise female patients of reproductive potential to use effective contraception while receiving oxaliplatin and for 9 months after the final dose. ( 8.3 ) Males: Based on its mechanism action as a genotoxic drug, advise males with female partners of reproductive potential to use effective contraception while receiving oxaliplatin and for 6 months after the final dose [see Nonclinical Toxicology ( 13.1 )].

8.1 Pregnancy Risk Summary Based on its direct interaction with DNA, oxaliplatin can cause fetal harm when administered to a pregnant woman. The available human data do not establish the presence or absence of major birth defects or miscarriage related to the use of oxaliplatin. Reproductive toxicity studies demonstrated adverse effects on embryo-fetal development in rats at maternal doses that were below the recommended human dose based on body surface area (see Data) . Advise a pregnant woman of the potential risk to a fetus. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Data Animal data Pregnant rats were administered oxaliplatin at less than one-tenth the recommended human dose based on body surface area during gestation days (GD) 1 to 5 (preimplantation), GD 6 to 10, or GD 11 to 16 (during organogenesis). Oxaliplatin caused developmental mortality (increased early resorptions) when administered on days GD 6 to 10 and GD 11 to 16 and adversely affected fetal growth (decreased fetal weight, delayed ossification) when administered on days GD 6 to 10.

8.2 Lactation Risk Summary There are no data on the presence of oxaliplatin or its metabolites in human or animal milk or its effects on the breastfed infant or on milk production. Because of the potential for serious adverse reactions in breastfed infants, advise women not to breastfeed during treatment with oxaliplatin and for 3 months after the final dose.

8.3 Females and Males of Reproductive Potential Pregnancy Testing Verify pregnancy status in females of reproductive potential prior to initiating oxaliplatin [see Use in Specific Populations (8.1) ] . Contraception Oxaliplatin can cause embryo-fetal harm when administered to a pregnant woman [see Use in Specific Populations (8.1) ] . Females Advise female patients of reproductive potential to use effective contraception while receiving oxaliplatin and for 9 months after the final dose. Males Based on its mechanism action as a genotoxic drug, advise males with female partners of reproductive potential to use effective contraception while receiving oxaliplatin and for 6 months after the final dose [see Nonclinical Toxicology (13.1) ] . Infertility Based on animal studies, oxaliplatin may impair fertility in males and females [see Nonclinical Toxicology (13.1) ] .

8.4 Pediatric Use The safety and effectiveness of oxaliplatin in pediatrics have not been established. Safety and effectiveness were assessed across 4 open-label studies in 235 patients aged 7 months to 22 years with solid tumors. In a multicenter, open-label, non-comparative, non-randomized study (ARD5531), oxaliplatin was administered to 43 patients with refractory or relapsed malignant solid tumors, mainly neuroblastoma and osteosarcoma. The dose limiting toxicity (DLT) was sensory neuropathy at a dose of 110 mg/m 2 . The main adverse reactions were: paresthesia (60%, grade 3 to 4: 7%), fever (40%, grade 3 to 4: 7%), and thrombocytopenia (40%, grade 3 to 4: 27%). No responses were observed. In an open-label non-randomized study (DFI7434), oxaliplatin was administered to 26 pediatric patients with metastatic or unresectable solid tumors, mainly neuroblastoma and ganglioneuroblastoma. The DLT was sensory neuropathy at a dose of 160 mg/m 2 . No responses were observed. In an open-label, single-agent study (ARD5021), oxaliplatin was administered to 43 pediatric patients with recurrent or refractory embryonal CNS tumors. The most common adverse reactions reported were: leukopenia (67%, grade 3 to 4: 12%), anemia (65%, grade 3 to 4: 5%), thrombocytopenia (65%, grade 3 to 4: 26%), vomiting (65%, grade 3 to 4: 7%), neutropenia (58%, grade 3 to 4: 16%), and sensory neuropathy (40%, grade 3 to 4: 5%). In an open-label single-agent study (ARD5530), oxaliplatin was administered to 123 pediatric patients with recurrent solid tumors, including neuroblastoma, osteosarcoma, Ewing sarcoma or peripheral PNET, ependymoma, rhabdomyosarcoma, hepatoblastoma, high grade astrocytoma, brain stem glioma, low grade astrocytoma, malignant germ cell tumor and other tumors. The most common adverse reactions reported were: sensory neuropathy (52%, grade 3 to 4: 12%), thrombocytopenia (37%, grade 3 to 4: 17%), anemia (37%, grade 3 to 4: 9%), vomiting (26%, grade 3 to 4: 4%), increased ALT (24%, grade 3 to 4: 6%), increased AST (24%, grade 3 to 4: 2%), and nausea (23%, grade 3 to 4: 3%). The pharmacokinetic parameters of ultrafiltrable platinum were evaluated in 105 pediatric patients during the first cycle. The mean clearance in pediatric patients estimated by the population pharmacokinetic analysis was 4.7 L/h (%CV, 41%). Mean platinum pharmacokinetic parameters in ultrafiltrate were Cmax of 0.75 ± 0.24 mcg/mL, AUC0-48h of 7.52 ± 5.07 mcg∙h/mL and AUCinf of 8.83 ± 1.57 mcg.h/mL at 85 mg/m 2 of oxaliplatin and Cmax of 1.10 ± 0.43 mcg/mL, AUC0-48h of 9.74 ± 2.52 mcg.h/mL and AUCinf of 17.3 ± 5.34 mcg.h/mL at 130 mg/m 2 of oxaliplatin.

8.5 Geriatric Use In the adjuvant treatment trial [see Clinical Studies (14.1) ] , 400 patients who received oxaliplatin with fluorouracil/leucovorin were greater than or equal to 65 years. The effect of oxaliplatin in patients greater than or equal to 65 years was not conclusive. Patients greater than or equal to 65 years receiving oxaliplatin experienced more diarrhea and grade 3 to 4 neutropenia (45% vs 39%) compared to patients less than 65 years. In the previously untreated advanced colorectal cancer trial [see Clinical Studies (14.2) ] , 99 patients who received oxaliplatin with fluorouracil and leucovorin were greater than or equal to 65 years. The same efficacy improvements in response rate, time to tumor progression, and overall survival were observed in the greater than or equal to 65 years patients as in the overall study population. Adverse reactions were similar in patients less than 65 and greater than or equal to 65 years, but older patients may have been more susceptible to diarrhea, dehydration, hypokalemia, leukopenia, fatigue, and syncope. In the previously treated advanced colorectal cancer trial [see Clinical Studies (14.3) ] , 55 patients who received oxaliplatin with fluorouracil and leucovorin were greater than or equal to 65 years. No overall differences in effectiveness were observed between these patients and younger adults. Adverse reactions were similar in patients less than 65 and greater than or equal to 65 years, but older patients may have been more susceptible to diarrhea, dehydration, hypokalemia, and fatigue. No significant effect of age on the clearance of ultrafiltrable platinum has been observed [see Clinical Pharmacology (12.3) ] .

8.6 Patients with Renal Impairment The AUC of unbound platinum in plasma ultrafiltrate was increased in patients with renal impairment [see Clinical Pharmacology (12.3) ] . No dose reduction is recommended for patients with mild (creatinine clearance 50 to 79 mL/min) or moderate (creatinine clearance 30 to 49 mL/min) renal impairment, calculated by Cockcroft-Gault equation. Reduce the dose of oxaliplatin in patients with severe renal impairment (creatinine clearance less than 30 mL/min) [see Dosage and Administration (2.3) ].

Oxaliplatin undergoes nonenzymatic conversion in physiologic solutions to active derivatives via displacement of the labile oxalate ligand. Several transient reactive species are formed, including monoaquo and diaquo DACH platinum, which covalently bind with macromolecules. Both inter- and intrastrand Pt-DNA crosslinks are formed. Crosslinks are formed between the N7 positions of two adjacent guanines (GG), adjacent adenine-guanines (AG), and guanines separated by an intervening nucleotide (GNG). These crosslinks inhibit DNA replication and transcription. Cytotoxicity is cell-cycle nonspecific. In vivo studies have shown antitumor activity of oxaliplatin against colon carcinoma. In combination with fluorouracil, oxaliplatin exhibits in vitro and in vivo antiproliferative activity greater than either compound alone in several tumor models (HT29 [colon], GR [mammary], and L1210 [leukemia]).