Other
A. Premature discontinuation of XARELTO increases the risk of thrombotic events B. Spinal/epidural hematoma- use of indwelling epidural catheters
- concomitant use of other drugs that affect hemostasis, such as non-steroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, other anticoagulants
- a history of traumatic or repeated epidural or spinal punctures
- a history of spinal deformity or spinal surgery
- optimal timing between the administration of XARELTO and neuraxial procedures is not known
Table 1: Bleeding Events in ROCKET AFMajor bleeding events within each subcategory were counted once per patient, but patients may have contributed events to multiple subcategories. These events occurred during treatment or within 2 days of stopping treatment.
- On Treatment Plus 2 Days Figure 2: Effect of Specific Populations on the Pharmacokinetics of Rivaroxaban- Advise patients to report any unusual bleeding or bruising to their physician. Inform patients that it might take them longer than usual to stop bleeding, and that they may bruise and/or bleed more easily when they are treated with XARELTO [see Warnings and Precautions (5.2)].
- If patients have had neuraxial anesthesia or spinal puncture, and particularly, if they are taking concomitant NSAIDs or platelet inhibitors, advise patients to watch for signs and symptoms of spinal or epidural hematoma, such as back pain, tingling, numbness (especially in the lower limbs), muscle weakness, and stool or urine incontinence. If any of these symptoms occur, advise the patient to contact his or her physician immediately [see Boxed Warning].
- Advise patients to inform their physician immediately if they become pregnant or intend to become pregnant during treatment with XARELTO [see Use in Specific Populations (8.1)].
- Advise pregnant women receiving XARELTO to immediately report to their physician any bleeding or symptoms of blood loss [see Warnings and Precautions (5.7)].
Premature discontinuation of any oral anticoagulant, including XARELTO, increases the risk of thrombotic events. If anticoagulation with XARELTO is discontinued for a reason other than pathological bleeding or completion of a course of therapy, consider coverage with another anticoagulant [see Dosage and Administration (2.3, 2.7), Warnings and Precautions (5.1), and Clinical Studies (14.1)].
Epidural or spinal hematomas have occurred in patients treated with XARELTO who are receiving neuraxial anesthesia or undergoing spinal puncture. These hematomas may result in long-term or permanent paralysis. Consider these risks when scheduling patients for spinal procedures. Factors that can increase the risk of developing epidural or spinal hematomas in these patients include:
[see Warnings and Precautions (5.2, 5.3) and Adverse Reactions (6.2)].
Monitor patients frequently for signs and symptoms of neurological impairment. If neurological compromise is noted, urgent treatment is necessary [see Warnings and Precautions (5.3)].
Consider the benefits and risks before neuraxial intervention in patients anticoagulated or to be anticoagulated for thromboprophylaxis [see Warnings and Precautions (5.3)].
Switching from Warfarin to XARELTO - When switching patients from warfarin to XARELTO, discontinue warfarin and start XARELTO as soon as the International Normalized Ratio (INR) is below 3.0 to avoid periods of inadequate anticoagulation.
Switching from XARELTO to Warfarin - No clinical trial data are available to guide converting patients from XARELTO to warfarin. XARELTO affects INR, so INR measurements made during coadministration with warfarin may not be useful for determining the appropriate dose of warfarin. One approach is to discontinue XARELTO and begin both a parenteral anticoagulant and warfarin at the time the next dose of XARELTO would have been taken.
Switching from XARELTO to Anticoagulants other than Warfarin - For patients currently taking XARELTO and transitioning to an anticoagulant with rapid onset, discontinue XARELTO and give the first dose of the other anticoagulant (oral or parenteral) at the time that the next XARELTO dose would have been taken [see Drug Interactions (7.4)].
Switching from Anticoagulants other than Warfarin to XARELTO - For patients currently receiving an anticoagulant other than warfarin, start XARELTO 0 to 2 hours prior to the next scheduled evening administration of the drug (e.g., low molecular weight heparin or non-warfarin oral anticoagulant) and omit administration of the other anticoagulant. For unfractionated heparin being administered by continuous infusion, stop the infusion and start XARELTO at the same time.
Administration via nasogastric (NG) tube or gastric feeding tube: After confirming gastric placement of the tube, 10 mg, 15 mg or 20 mg XARELTO tablets may be crushed and suspended in 50 mL of water and administered via an NG tube or gastric feeding tube. Since rivaroxaban absorption is dependent on the site of drug release, avoid administration of XARELTO distal to the stomach which can result in reduced absorption and thereby, reduced drug exposure. After the administration of a crushed XARELTO 15 mg or 20 mg tablet, the dose should then be immediately followed by enteral feeding [see Clinical Pharmacology (12.3)].
Crushed 10 mg, 15 mg or 20 mg XARELTO tablets are stable in water and in applesauce for up to 4 hours. An in vitro compatibility study indicated that there is no adsorption of rivaroxaban from a water suspension of a crushed XARELTO tablet to PVC or silicone nasogastric (NG) tubing.
Reversal of Anticoagulant Effect
A specific antidote for rivaroxaban is not available. Because of high plasma protein binding, rivaroxaban is not expected to be dialyzable [see Clinical Pharmacology (12.3)]. Protamine sulfate and vitamin K are not expected to affect the anticoagulant activity of rivaroxaban. Partial reversal of prothrombin time prolongation has been seen after administration of prothrombin complex concentrates (PCCs) in healthy volunteers. The use of other procoagulant reversal agents like activated prothrombin complex concentrate (APCC) or recombinant factor VIIa (rFVIIa) has not been evaluated.
Nonvalvular Atrial Fibrillation
Periodically assess renal function as clinically indicated (i.e., more frequently in situations in which renal function may decline) and adjust therapy accordingly [see Dosage and Administration (2.4)]. Consider dose adjustment or discontinuation of XARELTO in patients who develop acute renal failure while on XARELTO [see Use in Specific Populations (8.7)].
Treatment of Deep Vein Thrombosis (DVT), Pulmonary Embolism (PE), and Reduction in the Risk of Recurrence of DVT and of PE
Avoid the use of XARELTO in patients with CrCl <30 mL/min due to an expected increase in rivaroxaban exposure and pharmacodynamic effects in this patient population [see Use in Specific Populations (8.7)].
Prophylaxis of Deep Vein Thrombosis Following Hip or Knee Replacement Surgery
Avoid the use of XARELTO in patients with CrCl <30 mL/min due to an expected increase in rivaroxaban exposure and pharmacodynamic effects in this patient population. Observe closely and promptly evaluate any signs or symptoms of blood loss in patients with CrCl 30 to 50 mL/min. Patients who develop acute renal failure while on XARELTO should discontinue the treatment [see Use in Specific Populations (8.7)].
Hemorrhage
The most common adverse reactions with XARELTO were bleeding complications [see Warnings and Precautions (5.2)].
Nonvalvular Atrial Fibrillation
In the ROCKET AF trial, the most frequent adverse reactions associated with permanent drug discontinuation were bleeding events, with incidence rates of 4.3% for XARELTO vs. 3.1% for warfarin. The incidence of discontinuations for non-bleeding adverse events was similar in both treatment groups.
Table 1 shows the number of patients experiencing various types of bleeding events in the ROCKET AF trial.
| Parameter | XARELTO N=7111 n (%/year) | Warfarin N=7125 n (%/year) | XARELTO vs. Warfarin HR (95% CI) |
|---|---|---|---|
| Abbreviations: HR = Hazard Ratio, CI = Confidence interval, CRNM = Clinically Relevant Non-Major. | |||
Major Bleeding Defined as clinically overt bleeding associated with a decrease in hemoglobin of ≥2 g/dL, a transfusion of ≥2 units of packed red blood cells or whole blood, bleeding at a critical site, or with a fatal outcome. | 395 (3.6) | 386 (3.5) | 1.04 (0.90, 1.20) |
Intracranial Hemorrhage (ICH) Intracranial bleeding events included intraparenchymal, intraventricular, subdural, subarachnoid and/or epidural hematoma. | 55 (0.5) | 84 (0.7) | 0.67 (0.47, 0.93) |
Hemorrhagic Stroke Hemorrhagic stroke in this table specifically refers to non-traumatic intraparenchymal and/or intraventricular hematoma in patients on treatment plus 2 days. | 36 (0.3) | 58 (0.5) | 0.63 (0.42, 0.96) |
Other ICH | 19 (0.2) | 26 (0.2) | 0.74 (0.41, 1.34) |
Gastrointestinal (GI) Gastrointestinal bleeding events included upper GI, lower GI, and rectal bleeding. | 221 (2.0) | 140 (1.2) | 1.61 (1.30, 1.99) |
Fatal Bleeding Fatal bleeding is adjudicated death with the primary cause of death from bleeding. | 27 (0.2) | 55 (0.5) | 0.50 (0.31, 0.79) |
ICH | 24 (0.2) | 42 (0.4) | 0.58 (0.35, 0.96) |
Non-intracranial | 3 (0.0) | 13 (0.1) | 0.23 (0.07, 0.82) |
Figure 1 shows the risk of major bleeding events across major subgroups.
Figure 1: Risk of Major Bleeding Events by Baseline Characteristics in ROCKET AF – On Treatment Plus 2 Days
Note: The figure above presents effects in various subgroups all of which are baseline characteristics and all of which were pre-specified (diabetic status was not pre-specified in the subgroup, but was a criterion for the CHADS2 score). The 95% confidence limits that are shown do not take into account how many comparisons were made, nor do they reflect the effect of a particular factor after adjustment for all other factors. Apparent homogeneity or heterogeneity among groups should not be over-interpreted.
Treatment of Deep Vein Thrombosis (DVT), Pulmonary Embolism (PE), and to Reduce the Risk of Recurrence of DVT and of PE
EINSTEIN DVT and EINSTEIN PE Studies
In the pooled analysis of the EINSTEIN DVT and EINSTEIN PE clinical studies, the most frequent adverse reactions leading to permanent drug discontinuation were bleeding events, with XARELTO vs. enoxaparin/Vitamin K antagonist (VKA) incidence rates of 1.7% vs. 1.5%, respectively. The mean duration of treatment was 208 days for XARELTO-treated patients and 204 days for enoxaparin/VKA-treated patients.
Table 2 shows the number of patients experiencing major bleeding events in the pooled analysis of the EINSTEIN DVT and EINSTEIN PE studies.
| Parameter | XARELTO Treatment schedule in EINSTEIN DVT and EINSTEIN PE studies: XARELTO 15 mg twice daily for 3 weeks followed by 20 mg once daily; enoxaparin/VKA [enoxaparin: 1 mg/kg twice daily, VKA: individually titrated doses to achieve a target INR of 2.5 (range: 2.0–3.0)] N=4130 n (%) | Enoxaparin/VKA N=4116 n (%) |
|---|---|---|
Major bleeding event | 40 (1.0) | 72 (1.7) |
Fatal bleeding | 3 (<0.1) | 8 (0.2) |
Intracranial | 2 (<0.1) | 4 (<0.1) |
Non-fatal critical organ bleeding | 10 (0.2) | 29 (0.7) |
Intracranial Treatment-emergent major bleeding events with at least >2 subjects in any pooled treatment group | 3 (<0.1) | 10 (0.2) |
Retroperitoneal | 1 (<0.1) | 8 (0.2) |
Intraocular | 3 (<0.1) | 2 (<0.1) |
Intra-articular | 0 | 4 (<0.1) |
Non-fatal non-critical organ bleeding Major bleeding which is not fatal or in a critical organ, but resulting in a decrease in Hb ≥ 2 g/dL and/or transfusion of ≥2 units of whole blood or packed red blood cells | 27 (0.7) | 37 (0.9) |
Decrease in Hb ≥ 2 g/dL | 28 (0.7) | 42 (1.0) |
Transfusion of ≥2 units of whole blood or packed red blood cells | 18 (0.4) | 25 (0.6) |
Clinically relevant non-major bleeding | 357 (8.6) | 357 (8.7) |
Any bleeding | 1169 (28.3) | 1153 (28.0) |
EINSTEIN Extension Study
In the EINSTEIN Extension clinical study, the most frequent adverse reactions associated with permanent drug discontinuation were bleeding events, with incidence rates of 1.8% for XARELTO vs. 0.2% for placebo treatment groups. The mean duration of treatment was 190 days for both XARELTO and placebo treatment groups.
Table 3 shows the number of patients experiencing bleeding events in the EINSTEIN Extension study.
| Parameter | XARELTO Treatment schedule: XARELTO 20 mg once daily; matched placebo once daily 20 mg N=598 n (%) | Placebo N=590 n (%) |
|---|---|---|
Major bleeding event There were no fatal or critical organ bleeding events. | 4 (0.7) | 0 |
Decrease in Hb ≥2 g/dL | 4 (0.7) | 0 |
Transfusion of ≥2 units of whole blood or packed red blood cells | 2 (0.3) | 0 |
Gastrointestinal | 3 (0.5) | 0 |
Menorrhagia | 1 (0.2) | 0 |
Clinically relevant non-major bleeding | 32 (5.4) | 7 (1.2) |
Any bleeding | 104 (17.4) | 63 (10.7) |
Prophylaxis of Deep Vein Thrombosis Following Hip or Knee Replacement Surgery
In the RECORD clinical trials, the overall incidence rate of adverse reactions leading to permanent treatment discontinuation was 3.7% with XARELTO.
The rates of major bleeding events and any bleeding events observed in patients in the RECORD clinical trials are shown in Table 4.
| XARELTO 10 mg | Enoxaparin Includes the placebo-controlled period for RECORD 2, enoxaparin dosing was 40 mg once daily (RECORD 1–3) | |
|---|---|---|
Total treated patients | N=4487 | N=4524 |
Major bleeding event | 14 (0.3) | 9 (0.2) |
Fatal bleeding | 1 (<0.1) | 0 |
Bleeding into a critical organ | 2 (<0.1) | 3 (0.1) |
Bleeding that required re-operation | 7 (0.2) | 5 (0.1) |
Extra-surgical site bleeding requiring transfusion of >2 units of whole blood or packed cells | 4 (0.1) | 1 (<0.1) |
Any bleeding event Includes major bleeding events | 261 (5.8) | 251 (5.6) |
Hip Surgery Studies | N=3281 | N=3298 |
Major bleeding event | 7 (0.2) | 3 (0.1) |
Fatal bleeding | 1 (<0.1) | 0 |
Bleeding into a critical organ | 1 (<0.1) | 1 (<0.1) |
Bleeding that required re-operation | 2 (0.1) | 1 (<0.1) |
Extra-surgical site bleeding requiring transfusion of >2 units of whole blood or packed cells | 3 (0.1) | 1 (<0.1) |
Any bleeding event | 201 (6.1) | 191 (5.8) |
Knee Surgery Study | N=1206 | N=1226 |
Major bleeding event | 7 (0.6) | 6 (0.5) |
Fatal bleeding | 0 | 0 |
Bleeding into a critical organ | 1 (0.1) | 2 (0.2) |
Bleeding that required re-operation | 5 (0.4) | 4 (0.3) |
Extra-surgical site bleeding requiring transfusion of >2 units of whole blood or packed cells | 1 (0.1) | 0 |
Any bleeding event | 60 (5.0) | 60 (4.9) |
Following XARELTO treatment, the majority of major bleeding complications (≥60%) occurred during the first week after surgery.
Other Adverse Reactions
Non-hemorrhagic adverse reactions reported in ≥1% of XARELTO-treated patients in the EINSTEIN Extension study are shown in Table 5.
| System Organ Class Preferred Term | XARELTO N=598 n (%) | Placebo N=590 n (%) |
|---|---|---|
Gastrointestinal disorders | ||
Abdominal pain upper | 10 (1.7) | 1 (0.2) |
Dyspepsia | 8 (1.3) | 4 (0.7) |
Toothache | 6 (1.0) | 0 |
General disorders and administration site conditions | ||
Fatigue | 6 (1.0) | 3 (0.5) |
Infections and infestations | ||
Sinusitis | 7 (1.2) | 3 (0.5) |
Urinary tract infection | 7 (1.2) | 3 (0.5) |
Musculoskeletal and connective tissue disorders | ||
Back pain | 22 (3.7) | 7 (1.2) |
Osteoarthritis | 10 (1.7) | 5 (0.8) |
Respiratory, thoracic and mediastinal disorders | ||
Oropharyngeal pain | 6 (1.0) | 2 (0.3) |
Non-hemorrhagic adverse reactions reported in ≥1% of XARELTO-treated patients in RECORD 1–3 studies are shown in Table 6.
| System/Organ Class Adverse Reaction | XARELTO 10 mg N=4487 n (%) | Enoxaparin Includes the placebo-controlled period of RECORD 2, enoxaparin dosing was 40 mg once daily (RECORD 1–3) N=4524 n (%) |
|---|---|---|
Injury, poisoning and procedural complications | ||
Wound secretion | 125 (2.8) | 89 (2.0) |
Musculoskeletal and connective tissue disorders | ||
Pain in extremity | 74 (1.7) | 55 (1.2) |
Muscle spasm | 52 (1.2) | 32 (0.7) |
Nervous system disorders | ||
Syncope | 55 (1.2) | 32 (0.7) |
Skin and subcutaneous tissue disorders | ||
Pruritus | 96 (2.1) | 79 (1.8) |
Blister | 63 (1.4) | 40 (0.9) |
Other clinical trial experience: In an investigational study of acute medically ill patients being treated with XARELTO 10 mg tablets, cases of pulmonary hemorrhage and pulmonary hemorrhage with bronchiectasis were observed.
Nonvalvular Atrial Fibrillation
In the ROCKET AF trial, patients with CrCl 30 to 50 mL/min were administered XARELTO 15 mg once daily resulting in serum concentrations of rivaroxaban and clinical outcomes similar to those in patients with better renal function administered XARELTO 20 mg once daily. Patients with CrCl 15 to 30 mL/min were not studied, but administration of XARELTO 15 mg once daily is also expected to result in serum concentrations of rivaroxaban similar to those in patients with normal renal function [see Dosage and Administration (2.4) and Clinical Pharmacology (12.3)].
Patients with End-Stage Renal Disease on Dialysis
Clinical efficacy and safety studies with XARELTO did not enroll patients with end-stage renal disease (ESRD) on dialysis. In patients with ESRD maintained on intermittent hemodialysis, administration of XARELTO 15 mg once daily will result in concentrations of rivaroxaban and pharmacodynamic activity similar to those observed in the ROCKET AF study [see Clinical Pharmacology (12.2, 12.3)]. It is not known whether these concentrations will lead to similar stroke reduction and bleeding risk in patients with ESRD on dialysis as was seen in ROCKET AF.
Treatment of DVT and/or PE, and Reduction in the Risk of Recurrence of DVT and of PE
In the EINSTEIN trials, patients with CrCl values <30 mL/min at screening were excluded from the studies. Avoid the use of XARELTO in patients with CrCl <30 mL/min.
Prophylaxis of DVT Following Hip or Knee Replacement Surgery
The combined analysis of the RECORD 1–3 clinical efficacy studies did not show an increase in bleeding risk for patients with CrCl 30 to 50 mL/min and reported a possible increase in total venous thromboemboli in this population. Observe closely and promptly evaluate any signs or symptoms of blood loss in patients with CrCl 30 to 50 mL/min. Avoid the use of XARELTO in patients with CrCl <30 mL/min.
Specific Populations
Renal Impairment
The relationship between systemic exposure and pharmacodynamic activity of rivaroxaban was altered in subjects with renal impairment relative to healthy control subjects [see Use in Specific Populations (8.7)].
| Measure | Parameter | Creatinine Clearance (mL/min) | ||||
|---|---|---|---|---|---|---|
| 50–79 | 30–49 | 15–29 | ESRD (on dialysis) Separate stand-alone study. | ESRD (post-dialysis) | ||
| PT = Prothrombin time; FXa = Coagulation factor Xa; AUC = Area under the plasma concentration-time curve; AUEC = Area under the effect-time curve | ||||||
Exposure | AUC | 44 | 52 | 64 | 47 | 56 |
FXa Inhibition | AUEC | 50 | 86 | 100 | 49 | 33 |
PT Prolongation | AUEC | 33 | 116 | 144 | 112 | 158 |
Hepatic Impairment
Anti-Factor Xa activity was similar in subjects with normal hepatic function and in mild hepatic impairment (Child-Pugh A class). There is no clear understanding of the impact of hepatic impairment beyond this degree on the coagulation cascade and its relationship to efficacy and safety.
Absorption
The absolute bioavailability of rivaroxaban is dose-dependent. For the 10 mg dose, it is estimated to be 80% to 100% and is not affected by food. XARELTO 10 mg tablets can be taken with or without food. For the 20 mg dose in the fasted state, the absolute bioavailability is approximately 66%. Coadministration of XARELTO with food increases the bioavailability of the 20 mg dose (mean AUC and Cmax increasing by 39% and 76% respectively with food). XARELTO 15 mg and 20 mg tablets should be taken with food [see Dosage and Administration (2.2)].
The maximum concentrations (Cmax) of rivaroxaban appear 2 to 4 hours after tablet intake. The pharmacokinetics of rivaroxaban were not affected by drugs altering gastric pH. Coadministration of XARELTO (30 mg single dose) with the H2-receptor antagonist ranitidine (150 mg twice daily), the antacid aluminum hydroxide/magnesium hydroxide (10 mL) or XARELTO (20 mg single dose) with the PPI omeprazole (40 mg once daily) did not show an effect on the bioavailability and exposure of rivaroxaban (see Figure 3).
Absorption of rivaroxaban is dependent on the site of drug release in the GI tract. A 29% and 56% decrease in AUC and Cmax compared to tablet was reported when rivaroxaban granulate is released in the proximal small intestine. Exposure is further reduced when drug is released in the distal small intestine, or ascending colon. Avoid administration of rivaroxaban distal to the stomach which can result in reduced absorption and related drug exposure.
In a study with 44 healthy subjects, both mean AUC and Cmax values for 20 mg rivaroxaban administered orally as a crushed tablet mixed in applesauce were comparable to that after the whole tablet. However, for the crushed tablet suspended in water and administered via an NG tube followed by a liquid meal, only mean AUC was comparable to that after the whole tablet, and Cmax was 18% lower.
Distribution
Plasma protein binding of rivaroxaban in human plasma is approximately 92% to 95%, with albumin being the main binding component. The steady-state volume of distribution in healthy subjects is approximately 50 L.
Metabolism
Approximately 51% of an orally administered [14C]-rivaroxaban dose was recovered as inactive metabolites in urine (30%) and feces (21%). Oxidative degradation catalyzed by CYP3A4/5 and CYP2J2 and hydrolysis are the major sites of biotransformation. Unchanged rivaroxaban was the predominant moiety in plasma with no major or active circulating metabolites.
Excretion
In a Phase 1 study, following the administration of [14C]-rivaroxaban, approximately one-third (36%) was recovered as unchanged drug in the urine and 7% was recovered as unchanged drug in feces. Unchanged drug is excreted into urine, mainly via active tubular secretion and to a lesser extent via glomerular filtration (approximate 5:1 ratio). Rivaroxaban is a substrate of the efflux transporter proteins P-gp and ABCG2 (also abbreviated Bcrp). Rivaroxaban's affinity for influx transporter proteins is unknown.
Rivaroxaban is a low-clearance drug, with a systemic clearance of approximately 10 L/hr in healthy volunteers following intravenous administration. The terminal elimination half-life of rivaroxaban is 5 to 9 hours in healthy subjects aged 20 to 45 years.
Specific Populations
The effects of level of renal impairment, age, body weight, and level of hepatic impairment on the pharmacokinetics of rivaroxaban are summarized in Figure 2.
Gender
Gender did not influence the pharmacokinetics or pharmacodynamics of XARELTO.
Race
Healthy Japanese subjects were found to have 20 to 40% on average higher exposures compared to other ethnicities including Chinese. However, these differences in exposure are reduced when values are corrected for body weight.
Elderly
The terminal elimination half-life is 11 to 13 hours in the elderly subjects aged 60 to 76 years [see Use in Specific Populations (8.5)].
Renal Impairment
The safety and pharmacokinetics of single-dose XARELTO (10 mg) were evaluated in a study in healthy subjects [CrCl ≥80 mL/min (n=8)] and in subjects with varying degrees of renal impairment (see Figure 2). Compared to healthy subjects with normal creatinine clearance, rivaroxaban exposure increased in subjects with renal impairment. Increases in pharmacodynamic effects were also observed [see Use in Specific Populations (8.7)].
Hemodialysis in ESRD subjects: Systemic exposure to rivaroxaban administered as a single 15 mg dose in ESRD subjects dosed 3 hours after the completion of a 4-hour hemodialysis session (post-dialysis) is 56% higher when compared to subjects with normal renal function (see Table 7). The systemic exposure to rivaroxaban administered 2 hours prior to a 4-hour hemodialysis session with a dialysate flow rate of 600 mL/min and a blood flow rate in the range of 320 to 400 mL/min is 47% higher compared to those with normal renal function. The extent of the increase is similar to the increase in patients with CrCl 15 to 50 mL/min taking XARELTO 15 mg. Hemodialysis had no significant impact on rivaroxaban exposure. Protein binding was similar (86% to 89%) in healthy controls and ESRD subjects in this study.
Hepatic Impairment
The safety and pharmacokinetics of single-dose XARELTO (10 mg) were evaluated in a study in healthy subjects (n=16) and subjects with varying degrees of hepatic impairment (see Figure 2). No patients with severe hepatic impairment (Child-Pugh C) were studied. Compared to healthy subjects with normal liver function, significant increases in rivaroxaban exposure were observed in subjects with moderate hepatic impairment (Child-Pugh B) (see Figure 2). Increases in pharmacodynamic effects were also observed [see Use in Specific Populations (8.8)].
Anticoagulants
In a drug interaction study, single doses of enoxaparin (40 mg subcutaneous) and XARELTO (10 mg) given concomitantly resulted in an additive effect on anti-factor Xa activity. In another study, single doses of warfarin (15 mg) and XARELTO (5 mg) resulted in an additive effect on factor Xa inhibition and PT. Neither enoxaparin nor warfarin affected the pharmacokinetics of rivaroxaban (see Figure 3).
NSAIDs/Aspirin
In ROCKET AF, concomitant aspirin use (almost exclusively at a dose of 100 mg or less) during the double-blind phase was identified as an independent risk factor for major bleeding. NSAIDs are known to increase bleeding, and bleeding risk may be increased when NSAIDs are used concomitantly with XARELTO. Neither naproxen nor aspirin affected the pharmacokinetics of rivaroxaban (see Figure 3).
Clopidogrel
In two drug interaction studies where clopidogrel (300 mg loading dose followed by 75 mg daily maintenance dose) and XARELTO (15 mg single dose) were coadministered in healthy subjects, an increase in bleeding time to 45 minutes was observed in approximately 45% and 30% of subjects in these studies, respectively. The change in bleeding time was approximately twice the maximum increase seen with either drug alone. There was no change in the pharmacokinetics of either drug.
Drug-Disease Interactions with Drugs that Inhibit Cytochrome P450 3A4 Enzymes and Drug Transport Systems
In a pharmacokinetic trial, XARELTO was administered as a single dose in subjects with mild (CrCl = 50 to 79 mL/min) or moderate renal impairment (CrCl = 30 to 49 mL/min) receiving multiple doses of erythromycin (a combined P-gp and moderate CYP3A4 inhibitor). Compared to XARELTO administered alone in subjects with normal renal function (CrCl >80 mL/min), subjects with mild and moderate renal impairment concomitantly receiving erythromycin reported a 76% and 99% increase in AUCinf and a 56% and 64% increase in Cmax, respectively. Similar trends in pharmacodynamic effects were also observed.
EINSTEIN Deep Vein Thrombosis and EINSTEIN Pulmonary Embolism Studies
XARELTO for the treatment of DVT and/or PE and for the reduction in the risk of recurrence of DVT and of PE was studied in EINSTEIN DVT and EINSTEIN PE, multi-national, open-label, non-inferiority studies comparing XARELTO (at an initial dose of 15 mg twice daily with food for the first three weeks, followed by XARELTO 20 mg once daily with food) to enoxaparin 1 mg/kg twice daily for at least five days with VKA and then continued with VKA only after the target INR (2.0–3.0) was reached. Patients who required thrombectomy, insertion of a caval filter, or use of a fibrinolytic agent and patients with creatinine clearance <30 mL/min, significant liver disease, or active bleeding were excluded from the studies. The intended treatment duration was 3, 6, or 12 months based on investigator's assessment prior to randomization.
A total of 8281 (3449 in EINSTEIN DVT and 4832 in EINSTEIN PE) patients were randomized and followed on study treatment for a mean of 208 days in the XARELTO group and 204 days in the enoxaparin/VKA group. The mean age was approximately 57 years. The population was 55% male, 70% Caucasian, 9% Asian and about 3% Black. About 73% and 92% of XARELTO-treated patients in the EINSTEIN DVT and EINSTEIN PE studies, respectively, received initial parenteral anticoagulant treatment for a median duration of 2 days. Enoxaparin/VKA-treated patients in the EINSTEIN DVT and EINSTEIN PE studies received initial parenteral anticoagulant treatment for a median duration of 8 days. Aspirin was taken as on treatment concomitant antithrombotic medication by approximately 12% of patients in both treatment groups. Patients randomized to VKA had an unadjusted mean percentage of time in the INR target range of 2.0 to 3.0 of 58% in EINSTEIN DVT study and 60% in EINSTEIN PE study, with the lower values occurring during the first month of the study.
In the EINSTEIN DVT and EINSTEIN PE studies, 49% of patients had an idiopathic DVT/PE at baseline. Other risk factors included previous episode of DVT/PE (19%), recent surgery or trauma (18%), immobilization (16%), use of estrogen-containing drug (8%), known thrombophilic conditions (6%), or active cancer (5%).
In the EINSTEIN DVT and EINSTEIN PE studies, XARELTO was demonstrated to be non-inferior to enoxaparin/VKA for the primary composite endpoint of time to first occurrence of recurrent DVT or non-fatal or fatal PE [EINSTEIN DVT HR (95% CI): 0.68 (0.44, 1.04); EINSTEIN PE HR (95% CI): 1.12 (0.75, 1.68)]. In each study the conclusion of non-inferiority was based on the upper limit of the 95% confidence interval for the hazard ratio being less than 2.0.
Table 9 displays the overall results for the primary composite endpoint and its components for EINSTEIN DVT and EINSTEIN PE studies.
| Event | XARELTO 20 mg Treatment schedule in EINSTEIN DVT and EINSTEIN PE studies: XARELTO 15 mg twice daily for 3 weeks followed by 20 mg once daily; enoxaparin/VKA [enoxaparin: 1 mg/kg twice daily, VKA: individually titrated doses to achieve a target INR of 2.5 (range: 2.0–3.0)] | Enoxaparin/VKA | XARELTO vs. Enoxaparin/VKA Hazard Ratio (95% CI) |
|---|---|---|---|
EINSTEIN DVT Study | N=1731 | N=1718 | |
Primary Composite Endpoint | 36 (2.1) | 51 (3.0) | 0.68 (0.44, 1.04) |
Death (PE) | 1 (<0.1) | 0 | |
Death (PE cannot be excluded) | 3 (0.2) | 6 (0.3) | |
Symptomatic PE and DVT | 1 (<0.1) | 0 | |
Symptomatic recurrent PE only | 20 (1.2) | 18 (1.0) | |
Symptomatic recurrent DVT only | 14 (0.8) | 28 (1.6) | |
EINSTEIN PE Study | N=2419 | N=2413 | |
Primary Composite Endpoint | 50 (2.1) | 44 (1.8) | 1.12 (0.75, 1.68) |
Death (PE) | 3 (0.1) | 1 (<0.1) | |
Death (PE cannot be excluded) | 8 (0.3) | 6 (0.2) | |
Symptomatic PE and DVT | 0 | 2 (<0.1) | |
Symptomatic recurrent PE only | 23 (1.0) | 20 (0.8) | |
Symptomatic recurrent DVT only | 18 (0.7) | 17 (0.7) |
Figures 6 and 7 are plots of the time from randomization to the occurrence of the first primary efficacy endpoint event in the two treatment groups in EINSTEIN DVT and EINSTEIN PE studies, respectively.
Figure 6: Time to First Occurrence of the Composite of Recurrent DVT or Non-fatal or Fatal PE by Treatment Group (Intent-to-Treat Population) – EINSTEIN DVT Study
Figure 7: Time to First Occurrence of the Composite of Recurrent DVT or Non-fatal or Fatal PE by Treatment Group (Intent-to-Treat Population) – EINSTEIN PE Study
EINSTEIN Extension Study
XARELTO for reduction in the risk of recurrence of DVT and of PE was studied in the EINSTEIN Extension study, a multi-national, double-blind, superiority study comparing XARELTO (20 mg once daily with food) to placebo in patients who had completed 6 to 14 months of treatment for DVT and/or PE following the acute event. The intended treatment duration was 6 or 12 months based on investigator's assessment prior to randomization.
A total of 1196 patients were randomized and followed on study treatment for a mean of 190 days for both XARELTO and placebo treatment groups. The mean age was approximately 58 years. The population was 58% male, 78% Caucasian, 8% Asian and about 2% Black. Aspirin was taken as on-treatment concomitant antithrombotic medication by approximately 12% of patients in both treatment groups. In the EINSTEIN Extension study about 60% of patients had a history of proximal index DVT without PE event and 29% of patients had a PE without symptomatic DVT event. About 59% of patients had an idiopathic DVT/PE. Other risk factors included previous episode of DVT/PE (16%), immobilization (14%), known thrombophilic conditions (8%), or active cancer (5%).
In the EINSTEIN Extension study XARELTO was demonstrated to be superior to placebo for the primary composite endpoint of time to first occurrence of recurrent DVT or non-fatal or fatal PE [HR (95% CI): 0.18 (0.09, 0.39)].
Table 10 displays the overall results for the primary composite endpoint and its components.
| Event | XARELTO 20 mg N=602 n (%) | Placebo N=594 n (%) | XARELTO vs. Placebo Hazard Ratio (95% CI) |
|---|---|---|---|
Primary Composite Endpoint | 8 (1.3) | 42 (7.1) | 0.18 (0.09, 0.39) |
Death (PE) | 0 | 1 (0.2) | |
Death (PE cannot be excluded) | 1 (0.2) | 0 | |
Symptomatic recurrent PE | 2 (0.3) | 13 (2.2) | |
Symptomatic recurrent DVT | 5 (0.8) | 31 (5.2) |
Figure 8 is a plot of the time from randomization to the occurrence of the first primary efficacy endpoint event in the two treatment groups.
Figure 8: Time to First Occurrence of the Composite of Recurrent DVT or Non-fatal or Fatal PE by Treatment Group (Intent-to-Treat Population) – EINSTEIN Extension Study
Bleeding Risks
Invasive or Surgical Procedures
Instruct patients to inform their healthcare professional that they are taking XARELTO before any invasive procedure (including dental procedures) is scheduled.
Concomitant Medication and Herbals
Advise patients to inform their physicians and dentists if they are taking, or plan to take, any prescription or over-the-counter drugs or herbals, so their healthcare professionals can evaluate potential interactions [see Drug Interactions (7)].
Pregnancy and Pregnancy-Related Hemorrhage
Nursing
Advise patients to discuss with their physician if they are nursing or intend to nurse during anticoagulant treatment [see Use in Specific Populations (8.3)].
Females of Reproductive Potential
Advise patients who can become pregnant to discuss pregnancy planning with their physician [see Use in Specific Populations (8.6)].
Active Ingredient Made in Germany
Finished Product Manufactured by:
Janssen Ortho, LLC
Gurabo, PR 00778
or
Bayer Pharma AG
51368 Leverkusen, Germany
Manufactured for:
Janssen Pharmaceuticals, Inc.
Titusville, NJ 08560
Licensed from:
Bayer HealthCare AG
51368 Leverkusen, Germany
© Janssen Pharmaceuticals, Inc. 2011
Repackaged By:
Cardinal Health
Zanesville, OH 43701
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