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warnings and cautions
5 WARNINGS AND PRECAUTIONS • Hypertension: Control hypertension prior to initiating and during treatment with Mircera ( 5.3 ). • Seizures: Seizures have occurred in CKD patients participating in Mircera clinical studies. Increase monitoring of these patients for changes in seizure frequency or premonitory symptoms ( 5.4 ). • PRCA: If severe anemia and low reticulocyte count develop during Mircera treatment, withhold Mircera and evaluate for PRCA ( 5.6 ). • Serious Allergic Reactions: Discontinue Mircera and manage reactions ( 5.7 ). • Severe Cutaneous Reactions: Discontinue Mircera ( 5.8 ). 5.1 Increased Mortality, Myocardial Infarction, Stroke, and Thromboembolism • In controlled clinical trials of patients with CKD comparing higher hemoglobin targets (13 to 14 g/dL) to lower targets (9 to 11.3 g/dL), ESAs increased the risk of death, myocardial infarction, stroke, congestive heart failure, thrombosis of hemodialysis vascular access, and other thromboembolic events in the higher target groups. • Using ESAs to target a hemoglobin level of greater than 11 g/dL increases the risk of serious adverse cardiovascular reactions and has not been shown to provide additional benefit [see Clinical Studies ( 14 )] . Use caution in patients with coexistent cardiovascular disease and stroke [see Dosage and Administration ( 2.2 )] . Patients with CKD and an insufficient hemoglobin response to ESA therapy may be at even greater risk for cardiovascular reactions and mortality than other patients. A rate of hemoglobin rise of greater than 1 g/dL over 2 weeks may contribute to these risks. • In controlled clinical trials of patients with cancer, ESAs increased the risks for death and serious adverse cardiovascular reactions. These adverse reactions included myocardial infarction and stroke. • In controlled clinical trials, ESAs increased the risk of death in patients undergoing coronary artery bypass graft surgery (CABG) and the risk of deep venous thrombosis (DVT) in patients undergoing orthopedic procedures. The design and overall results of the 3 large trials comparing higher and lower hemoglobin targets are shown in Table 4 (Normal Hematocrit Study (NHS), Correction of Hemoglobin Outcomes in Renal Insufficiency (CHOIR) and Trial to Reduce Cardiovascular Events with Aranesp ® Therapy (TREAT)). Table 4: Randomized Controlled Trials Showing Adverse Cardiovascular Outcomes in Patients With CKD NHS (N = 1265) CHOIR (N = 1432) TREAT (N = 4038) Time Period of Trial 1993 to 1996 2003 to 2006 2004 to 2009 Population CKD patients on hemodialysis with coexisting CHF or CAD, hematocrit 30 ± 3% on epoetin alfa CKD patients not on dialysis with hemoglobin less than 11 g/dL not previously administered epoetin alfa CKD patients not on dialysis with type II diabetes, hemoglobin ≤11 g/dL Hemoglobin Target; Higher vs. Lower (g/dL) 14.0 vs. 10.0 13.5 vs. 11.3 13.0 vs. ≥9.0 Median (Q1, Q3) Achieved Hemoglobin level (g/dL) 12.6 (11.6, 13.3) vs. 10.3 (10.0, 10.7) 13.0 (12.2, 13.4) vs. 11.4 (11.1, 11.6) 12.5 (12.0, 12.8) vs. 10.6 (9.9, 11.3) Primary Endpoint All-cause mortality or nonfatal MI All-cause mortality, MI, hospitalization for CHF, or stroke All-cause mortality, MI, myocardial ischemia, heart failure, and stroke Hazard Ratio or Relative Risk (95% CI) 1.28 (1.06 to 1.56) 1.34 (1.03 to 1.74) 1.05 (0.94 to 1.17) Adverse Outcome for Higher Target Group All-cause mortality All-cause mortality Stroke Hazard Ratio or Relative Risk (95% CI) 1.27 (1.04 to 1.54) 1.48 (0.97 to 2.27) 1.92 (1.38 to 2.68) Patients with Chronic Kidney Disease NHS: A prospective, randomized, open-label study of 1265 patients with chronic kidney disease on dialysis with documented evidence of congestive heart failure or ischemic heart disease was designed to test the hypothesis that a higher target hematocrit (Hct) would result in improved outcomes compared with a lower target Hct. In this study, patients were randomized to epoetin alfa treatment targeted to a maintenance hemoglobin of either 14 ± 1 g/dL or 10 ± 1 g/dL. The trial was terminated early with adverse safety findings of higher mortality in the high hematocrit target group. Higher mortality (35% vs. 29%) was observed for the patients randomized to a target hemoglobin of 14 g/dL than for the patients randomized to a target hemoglobin of 10 g/dL. For all-cause mortality, the HR=1.27; 95% CI (1.04, 1.54); p=0.018. The incidence of nonfatal myocardial infarction, vascular access thrombosis, and other thrombotic events was also higher in the group randomized to a target hemoglobin of 14 g/dL. CHOIR: In a randomized prospective trial, 1432 patients with anemia due to CKD who were not undergoing dialysis were assigned to epoetin alfa treatment targeting a maintenance hemoglobin concentration of 13.5 g/dL or 11.3 g/dL. The trial was terminated early with adverse safety findings. A major cardiovascular event (death, myocardial infarction, stroke, or hospitalization for congestive heart failure) occurred among 125 (18%) of the 715 patients in the higher hemoglobin group compared to 97 (14%) among the 717 patients in the lower hemoglobin group (HR 1.3, 95% CI: 1.0, 1.7 p=0.03). TREAT: A randomized, double-blind, placebo-controlled, prospective trial of 4038 patients with: CKD not on dialysis (eGFR of 20 – 60 mL/min), anemia (hemoglobin levels ≤ 11 g/dL), and type 2 diabetes mellitus, patients were randomized to receive either darbepoetin alfa treatment or a matching placebo. Placebo group patients also received darbepoetin alfa when their hemoglobin levels were below 9 g/dL. The trial objectives were to demonstrate the benefit of darbepoetin alfa treatment of the anemia to a target hemoglobin level of 13 g/dL, when compared to a “placebo” group, by reducing the occurrence of either of two primary endpoints: (1) a composite cardiovascular endpoint of all-cause mortality or a specified cardiovascular event (myocardial ischemia, CHF, MI, and CVA) or (2) a composite renal endpoint of all-cause mortality or progression to end stage renal disease. The overall risks for each of the two primary endpoints (the cardiovascular composite and the renal composite) were not reduced with darbepoetin alfa treatment (see Table 4 ), but the risk of stroke was increased nearly two-fold in the darbepoetin alfa-treated group vs. the placebo group: annualized stroke rate 2.1% vs. 1.1%, respectively, HR 1.92; 95% CI: 1.38, 2.68; p less than 0.001. The relative risk of stroke was particularly high in patients with a prior stroke: annualized stroke rate 5.2% in the darbepoetin alfa-treated group and 1.9% in the placebo group, HR 3.07; 95% CI: 1.44, 6.54. Also, among darbepoetin alfa-treated subjects with a past history of cancer, there were more deaths due to all causes and more deaths adjudicated as due to cancer, in comparison with the control group. Patients with Cancer An increased incidence of thromboembolic reactions, some serious and life-threatening, occurred in patients with cancer treated with ESAs. In a randomized, placebo-controlled study (Study 1 in Table 5 [see Warnings and Precautions ( 5.2 )] ) of 939 women with metastatic breast cancer receiving chemotherapy, patients received either weekly epoetin alfa or placebo for up to a year. This study was designed to show that survival was superior when epoetin alfa was administered to prevent anemia (maintain hemoglobin levels between 12 and 14 g/dL or hematocrit between 36% and 42%). This study was terminated prematurely when interim results demonstrated a higher mortality at 4 months (8.7% vs. 3.4%) and a higher rate of fatal thrombotic reactions (1.1% vs. 0.2%) in the first 4 months of the study among patients treated with epoetin alfa. Based on Kaplan-Meier estimates, at the time of study termination, the 12-month survival was lower in the epoetin alfa group than in the placebo group (70% vs. 76%; HR 1.37, 95% CI: 1.07, 1.75; p = 0.012). Patients Having Surgery Mircera is not approved for reduction of RBC transfusions in patients scheduled for surgical procedures. An increased incidence of deep vein thrombosis (DVT) in patients receiving epoetin alfa undergoing surgical orthopedic procedures has been observed. In a randomized controlled study (referred to as the “SPINE” study), 681 adult patients, not receiving prophylactic anticoagulation and undergoing spinal surgery, received epoetin alfa and standard of care (SOC) treatment, or SOC treatment alone. Preliminary analysis showed a higher incidence of DVT, determined by either Color Flow Duplex Imaging or by clinical symptoms, in the epoetin alfa group [16 patients (4.7%)] compared to the SOC group [7 patients (2.1%)]. In addition, 12 patients in the epoetin alfa group and 7 patients in the SOC group had other thrombotic vascular events. Increased mortality was observed in a randomized placebo-controlled study of epoetin alfa in adult patients who were undergoing coronary artery bypass surgery (7 deaths in 126 patients randomized to epoetin alfa vs. no deaths among 56 patients receiving placebo). Four of these deaths occurred during the period of study drug administration and all four deaths were associated with thrombotic events. 5.2 Increased Mortality and/or Increased Risk of Tumor Progression or Recurrence in Patients with Cancer Mircera is not indicated and is not recommended for use in the treatment of anemia due to cancer chemotherapy. A dose-ranging trial of Mircera in 153 patients who were undergoing chemotherapy for non-small cell lung cancer was terminated prematurely because more deaths occurred among patients receiving Mircera than another ESA. ESAs resulted in decreased locoregional control/progression-free survival and/or overall survival (see Table 5 ). These findings were observed in studies of patients with advanced head and neck cancer receiving radiation therapy (Studies 5 and 6), in patients receiving chemotherapy for metastatic breast cancer (Study 1) or lymphoid malignancy (Study 2), and in patients with non-small cell lung cancer or various malignancies who were not receiving chemotherapy or radiotherapy (Studies 7 and 8). Table 5: Randomized, Controlled Trials with Decreased Survival and/or Decreased Locoregional Control *Q1= 25th percentile; Q3= 75th percentile Study/Tumor (n) Hemoglobin Target Achieved Hemoglobin (Median Q1,Q3*) Primary Endpoint Adverse Outcome for ESA-containing Arm Chemotherapy Cancer Study 1 Metastatic breast cancer (n=939) 12 to 14 g/dL 12.9 g/dL 12.2, 13.3 g/dL 12-month overall survival Decreased 12-month survival Cancer Study 2 Lymphoid malignancy (n=344) 13 to 15 g/dL (M) 13 to 14 g/dL (F) 11.0 g/dL 9.8, 12.1 g/dL Proportion of patients achieving a hemoglobin response Decreased overall survival Cancer Study 3 Early breast cancer (n=733) 12.5 to 13 g/dL 13.1 g/dL 12.5, 13.7 g/dL Relapse-free and overall survival Decreased 3-year relapse-free and overall survival Cancer Study 4 Cervical cancer (n=114) 12 to 14 g/dL 12.7 g/dL 12.1, 13.3 g/dL Progression-free and overall survival and locoregional control Decreased 3-year progression-free and overall survival and locoregional control Radiotherapy Alone Cancer Study 5 Head and neck cancer (n=351) more than 15 g/dL (M) more than 14 g/dL (F) Not available Locoregional progression-free survival (LRPFS) Decreased 5-year locoregional progression-free survival Decreased overall survival Cancer Study 6 Head and neck cancer (n=522) 14 to 15.5 g/dL Not available Locoregional disease control (LRC) Decreased locoregional disease control No Chemotherapy or Radiotherapy Cancer Study 7 Non-small cell lung cancer (n=70) 12 to 14 g/dL Not available Quality of life Decreased overall survival Cancer Study 8 Non-myeloid malignancy (n=989) 12 to 13 g/dL 10.6 g/dL 9.4, 11.8 g/dL RBC transfusions Decreased overall survival Decreased Overall Survival Cancer Study 1 (the “BEST” study) was previously described [see Warnings and Precautions ( 5.1 ) ]. Mortality at 4 months (8.7% vs. 3.4%) was significantly higher in the epoetin alfa arm. The most common investigator-attributed cause of death within the first 4 months was disease progression; 28 of 41 deaths in the epoetin alfa arm and 13 of 16 deaths in the placebo arm were attributed to disease progression. Investigator assessed time to tumor progression was not different between the two groups. Survival at 12 months was significantly lower in the epoetin alfa arm (70% vs. 76%, HR 1.37, 95% CI: 1.07, 1.75; p=0.012). Cancer Study 2 was a Phase 3, double-blind, randomized (darbepoetin alfa vs. placebo) study conducted in 344 anemic patients with lymphoid malignancy receiving chemotherapy. With a median follow-up of 29 months, overall mortality rates were significantly higher among patients randomized to darbepoetin alfa as compared to placebo (HR 1.36, 95% CI: 1.02, 1.82). Cancer Study 7 was a Phase 3, multicenter, randomized (epoetin alfa vs. placebo), double-blind study, in which patients with advanced non-small cell lung cancer receiving only palliative radiotherapy or no active therapy were treated with epoetin alfa to achieve and maintain hemoglobin levels between 12 and 14 g/dL. Following an interim analysis of 70 of 300 patients planned, a significant difference in survival in favor of the patients on the placebo arm of the trial was observed (median survival 63 vs. 129 days; HR 1.84; p=0.04). Cancer Study 8 was a Phase 3, double-blind, randomized (darbepoetin alfa vs. placebo), 16-week study in 989 anemic patients with active malignant disease, neither receiving nor planning to receive chemotherapy or radiation therapy. There was no evidence of a statistically significant reduction in proportion of patients receiving RBC transfusions. The median survival was shorter in the darbepoetin alfa treatment group (8 months) compared with the placebo group (10.8 months); HR 1.30, 95% CI: 1.07, 1.57. Decreased Progression-Free Survival and Overall Survival Cancer Study 3 (the “PREPARE” study) was a randomized controlled study in which darbepoetin alfa was administered to prevent anemia conducted in 733 women receiving neo-adjuvant breast cancer treatment. A final analysis was performed after a median follow-up of approximately 3 years at which time the survival rate was lower (86% vs. 90%, HR 1.42, 95% CI: 0.93, 2.18) and relapse-free survival rate was lower (72% vs. 78%, HR 1.33, 95% CI: 0.99, 1.79) in the darbepoetin alfa-treated arm compared to the control arm. Cancer Study 4 (protocol GOG 191) was a randomized controlled study that enrolled 114 of a planned 460 cervical cancer patients receiving chemotherapy and radiotherapy. Patients were randomized to receive epoetin alfa to maintain hemoglobin between 12 and 14 g/dL or to transfusion support as needed. The study was terminated prematurely due to an increase in thromboembolic events in epoetin alfa-treated patients compared to control (19% vs. 9%). Both local recurrence (21% vs. 20%) and distant recurrence (12% vs. 7%) were more frequent in epoetin alfa-treated patients compared to control. Progression-free survival at 3 years was lower in the epoetin alfa-treated group compared to control (59% vs. 62%, HR 1.06, 95% CI: 0.58, 1.91). Overall survival at 3 years was lower in the epoetin alfa-treated group compared to control (61% vs. 71%, HR 1.28, 95% CI: 0.68, 2.42). Cancer Study 5 (the “ENHANCE” study) was a randomized controlled study in 351 head and neck cancer patients where epoetin beta or placebo was administered to achieve target hemoglobins of 14 and 15 g/dL for women and men, respectively. Locoregional progression-free survival was significantly shorter in patients receiving epoetin beta (HR 1.62, 95% CI: 1.22, 2.14, p=0.0008) with a median of 406 days epoetin beta vs. 745 days placebo. Overall survival was significantly shorter in patients receiving epoetin beta (HR 1.39, 95% CI: 1.05, 1.84; p=0.02). Decreased Locoregional Control Cancer Study 6 (DAHANCA 10) was conducted in 522 patients with primary squamous cell carcinoma of the head and neck receiving radiation therapy randomized to darbepoetin alfa with radiotherapy or radiotherapy alone. An interim analysis on 484 patients demonstrated that locoregional control at 5 years was significantly shorter in patients receiving darbepoetin alfa (RR 1.44, 95% CI: 1.06, 1.96; p=0.02). Overall survival was shorter in patients receiving darbepoetin alfa (RR 1.28, 95% CI: 0.98, 1.68; p=0.08). 5.3 Hypertension Mircera is contraindicated in patients with uncontrolled hypertension. In Mircera clinical studies, approximately 27% of patients with CKD, including patients on dialysis and patients not on dialysis, required intensification of antihypertensive therapy. Hypertensive encephalopathy and/or seizures have been observed in patients with CKD treated with Mircera [see Warnings and Precautions ( 5.4 )] . Appropriately control hypertension prior to initiation of and during treatment with Mircera. Reduce or withhold Mircera if blood pressure becomes difficult to control. Advise patients of the importance of compliance with antihypertensive therapy and dietary restrictions [see Patient Counseling Information ( 17 )] . 5.4 Seizures Seizures have occurred in patients participating in Mircera clinical studies. During the first several months following initiation of Mircera, monitor patients closely for premonitory neurologic symptoms. Advise patients to contact their healthcare practitioner for new-onset seizures, premonitory symptoms, or change in seizure frequency. 5.5 Lack or Loss of Hemoglobin Response to Mircera For lack or loss of hemoglobin response to Mircera, initiate a search for causative factors (e.g., iron deficiency, infection, inflammation, bleeding). If typical causes of lack or loss of hemoglobin response are excluded, evaluate for PRCA [see Warnings and Precautions ( 5.6 )] . In the absence of PRCA, follow dosing recommendations for management of patients with an insufficient response to Mircera therapy [see Dosage and Administration ( 2.1 )]. 5.6 Pure Red Cell Aplasia Cases of PRCA and of severe anemia, with or without other cytopenias that arise following the development of neutralizing antibodies to erythropoietin have been reported in the postmarketing setting in patients treated with Mircera. This has been reported predominantly in patients with CKD receiving ESAs by subcutaneous administration. PRCA was not observed in clinical studies of Mircera. PRCA has also been reported in patients receiving ESAs for anemia related to hepatitis C treatment (an indication for which Mircera is not approved). If severe anemia and low reticulocyte count develop during treatment with Mircera, withhold Mircera and evaluate patients for neutralizing antibodies to erythropoietin [see Warnings and Precautions ( 5.5 )] . Serum samples should be obtained at least a month after the last Mircera administration to prevent interference of Mircera with the assay. Contact Vifor at 1-800-576-8295 to perform assays for binding and neutralizing antibodies. Permanently discontinue Mircera in patients who develop PRCA following treatment with Mircera or other erythropoietin protein drugs. Do not switch patients to other ESAs as antibodies may cross-react [see Adverse Reactions ( 6.2 )] . 5.7 Serious Allergic Reactions Serious allergic reactions, including anaphylactic reactions, angioedema, bronchospasm, tachycardia, pruritus skin rash and urticaria have been reported in patients treated with Mircera. If a serious allergic or anaphylactic reaction occurs due to Mircera, immediately and permanently discontinue Mircera and administer appropriate therapy. 5.8 Severe Cutaneous Reactions Blistering and skin exfoliation reactions including Erythema multiforme and Stevens-Johnson Syndrome (SJS)/Toxic Epidermal Necrolysis (TEN), have been reported in patients treated with ESAs (including Mircera) in the postmarketing setting. Discontinue Mircera therapy immediately if a severe cutaneous reaction, such as SJS/TEN, is suspected. 5.9 Dialysis Management Patients may require adjustments in their dialysis prescription after initiation of Mircera. Patients receiving Mircera may require increased anticoagulation with heparin to prevent clotting of the extracorporeal circuit during hemodialysis.