This information is intended for use by health professionals
Reconstituted concentrate for solution for injection or infusionpH in the range of the 4.6 to 6.0 and osmolality in the range of 250 to 450 mOsmol/Kg of the reconstituted solution (concentration 50 mg/ml).
Patients undergoing PCI, including primary PCIThe recommended dose of bivalirudin for patients undergoing PCI is an intravenous bolus of 0.75 mg/kg body weight followed immediately by an intravenous infusion at a rate of 1.75 mg/kg body weight/hour for at least the duration of the procedure. The infusion of 1.75 mg/kg body weight/hour may be continued for up to 4 hours post-PCI as clinically warranted and in STEMI patients should be continued for up to 4 hours post-PCI (see section 4.4). The infusion may be continued at a reduced dose of 0.25 mg/kg/h for an additional 4 12 hours as clinically necessary.Patients should be carefully monitored following primary PCI for signs and symptoms consistent with myocardial ischaemia.
Patients with unstable angina/non-ST segment elevated myocardial infarction (UA/NSTEMI)The recommended starting dose of bivalirudin for medically managed patients with acute coronary syndrome (ACS) is an intravenous bolus of 0.1 mg/kg followed by an infusion of 0.25 mg/kg/h. Patients who are to be medically managed may continue the infusion of 0.25 mg/kg/h for up to 72 hours. If the medically managed patient proceeds to PCI, an additional bolus of 0.5 mg/kg of bivalirudin should be administered before the procedure and the infusion increased to 1.75 mg/kg/h for the duration of the procedure.Following PCI, the reduced infusion dose of 0.25 mg/kg/h may be resumed for 4 to 12 hours as clinically necessary.For patients who proceed to coronary artery bypass graft (CABG) surgery off pump, the intravenous infusion of bivalirudin should be continued until the time of surgery. Just prior to surgery, a 0.5 mg/kg bolus dose should be administered followed by a 1.75 mg/kg/h intravenous infusion for the duration of the surgery.For patients who proceed to CABG surgery on pump, the intravenous infusion of bivalirudin should be continued until 1 hour prior to surgery after which the infusion should be discontinued and the patient treated with unfractionated heparin (UFH).To ensure appropriate administration of bivalirudin, the completely dissolved, reconstituted and diluted product should be thoroughly mixed prior to administration (see section 6.6). The bolus dose should be administered by a rapid intravenous push to ensure that the entire bolus reaches the patient before the start of the procedure.Intravenous infusion lines should be primed with bivalirudin to ensure continuity of drug infusion after delivery of the bolus.The infusion dose should be initiated immediately after the bolus dose is administered, ensuring delivery to the patient prior to the procedure, and continued uninterrupted for the duration of the procedure. The safety and efficacy of a bolus dose of bivalirudin without the subsequent infusion has not been evaluated and is not recommended even if a short PCI procedure is planned.An increase in the activated clotting time (ACT) may be used as an indication that a patient has received bivalirudin.ACT values 5 minutes after bivalirudin bolus average 365 +/- 100 seconds. If the 5-minute ACT is less than 225 seconds, a second bolus dose of 0.3 mg/kg should be administered.Once the ACT value is greater than 225 seconds, no further monitoring is required provided the 1.75 mg/kg/h infusion dose is properly administered.Where insufficient ACT increase is observed, the possibility of medication error should be considered, for example inadequate mixing of Bivalirudin or intravenous equipment failures. The arterial sheath can be removed 2 hours after discontinuation of the bivalirudin infusion without anticoagulation monitoring.
Use with other anticoagulant therapyIn STEMI patients undergoing primary PCI, standard pre-hospital adjunctive therapy should include clopidogrel and may include the early administration of UFH (See section 5.1).Patients can be started on Bivalirudin 30 minutes after discontinuation of unfractionated heparin given intravenously, or 8 hours after discontinuation of low molecular weight heparin given subcutaneously. Bivalirudin can be used in conjunction with a GP IIb/IIIa inhibitor. For further information regarding the use of bivalirudin with or without a GP IIb/IIIa inhibitor, please see section 5.1.
Renal insufficiencyBivalirudin is contraindicated in patients with severe renal insufficiency (GFR<30 ml/min) and also in dialysis-dependent patients (see section 4.3). In patients with mild or moderate renal insufficiency, the ACS dose (0.1 mg/kg bolus/0.25 mg/kg/h infusion) should not be adjusted.Patients with moderate renal impairment (GFR 30-59 ml/min) undergoing PCI (whether being treated with bivalirudin for ACS or not) should receive a lower infusion rate of 1.4 mg/kg/h. The bolus dose should not be changed from the posology described under ACS or PCI above.Patients with renal impairment should be carefully monitored for clinical signs of bleeding during PCI, as clearance of bivalirudin is reduced in these patients (see section 5.2)If the 5-minute ACT is less than 225 seconds, a second bolus dose of 0.3 mg/kg should be administered and the ACT re-checked 5 minutes after the administration of the second bolus dose.Where insufficient ACT increase is observed, the possibility of medication error should be considered, for example inadequate mixing of Bivalirudin or intravenous equipment failures.
Hepatic impairmentNo dose adjustment is needed. Pharmacokinetic studies indicate that hepatic metabolism of bivalirudin is limited, therefore the safety and efficacy of bivalirudin have not been specifically studied in patients with hepatic impairment.
Elderly populationIncreased awareness due to high bleeding risk should be exercised in the elderly because of age-related decrease in renal function. Dose adjustments for this age group should be on the basis of renal function.
Paediatric patientsThere is currently no indication for the use of Bivalirudin in children less than 18 years old and no recommendation on a posology can be made. Currently available data are described in sections 5.1 and 5.2.
Method of administrationBivalirudin is intended for intravenous use. Bivalirudin should be initially reconstituted to give a solution of 50 mg/ml bivalirudin. Reconstituted material should then be further diluted in a total volume of 50 ml to give a solution of 5 mg/ml bivalirudin.Reconstituted and diluted product should be thoroughly mixed prior to administration. The reconstituted/diluted solution will be a clear to slightly opalescent, colourless to slightly yellow solution.Bivalirudin is administered as a weight based regimen consisting of an initial bolus (by rapid IV push) followed by an IV infusion. For instructions on reconstitution and dilution of the medicinal product before administration, see section 6.6.
HaemorrhagePatients must be observed carefully for symptoms and signs of bleeding during treatment particularly if bivalirudin is combined with another anticoagulant (see section 4.5). Although most bleeding associated with bivalirudin occurs at the site of arterial puncture in patients undergoing PCI, haemorrhage can occur at any site during therapy. Unexplained decreases in haematocrit, haemoglobin or blood pressure may indicate haemorrhage. Treatment should be stopped if bleeding is observed or suspected.There is no known antidote to bivalirudin but its effect wears off quickly (T1/2 is 35 to 40 minutes). Prolonged post PCI infusions of bivalirudin at recommended doses have not been associated with an increased rate of bleeding (see section 4.2).
Co-administration with platelet inhibitors or anti-coagulantsCombined use of anti-coagulant medicinal products can be expected to increase the risk of bleeding (see section 4.5). When bivalirudin is combined with a platelet inhibitor or an anti-coagulant medicine, clinical and biological parameters of haemostasis should be regularly monitored.In patients taking warfarin who are treated with bivalirudin, International Normalised Ratio (INR) monitoring should be considered to ensure that it returns to pre-treatment levels following discontinuation of bivalirudin treatment.
HypersensitivityAllergic type hypersensitivity reactions were reported uncommonly (≥1/1,000 to ≤1/100) in clinical trials. Necessary preparations should be made to deal with this. Patients should be informed of the early signs of hypersensitivity reactions including hives, generalised urticaria, tightness of chest, wheezing, hypotension and anaphylaxis. In the case of shock, the current medical standards for shock treatment should be applied. Anaphylaxis, including anaphylactic shock with fatal outcome has been reported very rarely (≤1/10,000) in post-marketing experience (see section 4.8).Treatment-emergent positive bivalirudin antibodies are rare and have not been associated with clinical evidence of allergic or anaphylactic reactions. Caution should be exercised in patients previously treated with lepirudin who had developed lepirudin antibodies.
Acute stent thrombosisAcute stent thrombosis (<24 hours) has been observed in patients with STEMI undergoing primary PCI and has been managed by Target Vessel Revascularisation (TVR) (see sections 4.8 and 5.1). The majority of these cases were non-fatal. This increased risk of acute stent thrombosis was observed during the first 4 hours following the end of the procedure among patients who either discontinued the infusion of bivalirudin at the end of the procedure or received a continued infusion at the reduced dose of 0.25 mg/kg/h (see section 4.2). Patients should remain for at least 24 hours in a facility capable of managing ischaemic complications and should be carefully monitored following primary PCI for signs and symptoms consistent with myocardial ischaemia.
BrachytherapyIntra-procedural thrombus formation has been observed during gamma brachytherapy procedures with bivalirudin.Bivalirudin should be used with caution during beta brachytherapy procedures.
ExcipientBivalirudin contains less than 1 mmol sodium (23 mg) per vial, i.e. essentially sodium-free.
PregnancyThere are no or limited data from the use of bivalirudin in pregnant women. Animal studies are insufficient with respect to effects on pregnancy, embryonal/foetal development, parturition or post- natal development (see section 5.3).Bivalirudin should not be used during pregnancy unless the clinical condition of the woman requires treatment with bivalirudin.
Breast-feedingIt is unknown whether bivalirudin is excreted in human milk. Bivalirudin should be administered with caution in breast-feeding mothers.
Summary of the safety profile The most frequent serious and fatal adverse reactions are major haemorrhage (access site and non access-site bleeding, including intracranial haemorrhage) and hypersensitivity, including anaphylactic shock. Coronary artery thrombosis and coronary stent thrombosis with myocardial infarction, and catheter thrombosis have each been reported rarely. Administration errors may lead to fatal thrombosis. In patients receiving warfarin, INR is increased by administration of bivalirudin.
Tabulated list of adverse reactionsAdverse reactions for bivalirudin from HORIZONS, ACUITY, REPLACE-2 trials and post-marketing experience are listed by system organ class in Table 1.
Table 1. Adverse reactions for bivalirudin from HORIZONS, ACUITY, REPLACE-2 trials and post-marketing experience
|System organ class||Very common(≥1/10)||Common (≥1/100 to <1/10)||Uncommon (≥1/1,000 to <1/100)||Rare (≥1/10,000 to < 1/1,000)||Very rare ( <1/10,000)|
|Blood and lymphatic system disorders||Haemoglobin decreased||Thrombocytopenia Anaemia||INR increasedd|
|Immune system disorders||Hypersensitivity, including anaphylactic reaction and shock, including reports with fatal outcome|
|Nervous system disorders||Headache||Intracranial haemorrhage|
|Eye disorders||Intraocular haemorrhage|
|Ear and labyrinth disorders||Ear haemorrhage|
|Cardiac disorders||Myocardial infarction, Cardiac tamponade, Pericardial haemorrhage, Coronary artery thrombosis, Angina pectoris. Bradycardia, Ventricular tachycardia Chest pain|
|Vascular disorders||Minor haemorrha ge at any site||Major haemorrhage at any site including reports with fatal outcome||Haematoma,Hypotension||Coronary stent thrombosis including reports with fatal outcomeC Thrombosis including reports with fatal outcome, Arteriovenous fistula, Catheter thrombosis, Vascular pseudoaneurysm||Compartment syndromea, b|
|Respiratory, thoracic and mediastinal disorders||Epistaxis,Haemoptysis,Pharyngeal haemorrhage||Pulmonary haemorrhage Dyspnoeaa|
|Gastrointestinal disorders||Gastrointestinal haemorrhage (including haematemesis, melaena, oesophageal haemorrhage, anal haemorrhage), Retroperitoneal haemorrhage, Gingival haemorrhage, Nausea||Peritoneal haemorrhage, Retroperitoneal haematoma, Vomiting|
|Skin and subcutaneous tissue disorders||Ecchymosis||Rash, Urticaria|
|Musculoskeletal and connective tissue disorders||Back pain, Groin pain|
|Renal and urinary disorders||Haematuria|
|General disorders and administration site conditions||Access site haemorrhage, Vessel puncture site haematoma ≥5 cm, Vessel puncture site haematoma <5 cm||Injection site reactions (Injection site discomfort, Injection site pain, Puncture site reaction)|
|Injury, poisoning and procedural complications||Reperfusion injury (no or slow reflow), Contusion|
Description of selected adverse reactionsHaemorrhageIn all clinical studies bleeding data were collected separately from adverse reactions and are summarised in Table 6 together with the bleeding definitions used for each study.
The HORIZONS Trial (Patients with STEMI undergoing primary PCI)
Platelets, bleeding and clottingIn the HORIZONS study both major and minor bleeding occurred commonly (≥1/100 and <1/10). The incidence of major and minor bleeding was significantly less in patients treated with bivalirudin versus patients treated with heparin plus a GP IIb/IIIa inhibitor. The incidence of major bleeding is shown in Table 6. Major bleeding occurred most frequently at the sheath puncture site. The most frequent event was a haematoma <5 cm at puncture site.In the HORIZONS study, thrombocytopenia was reported in 26 (1. 6%) of bivalirudin-treated patients and in 67 (3.9%) of patients treated with heparin plus a GP IIb/IIIa inhibitor. All of these bivalirudin- treated patients received concomitant acetylsalicylic acid, all but 1 received clopidogrel and 15 also received a GP IIb/IIIa inhibitor.The ACUITY Trial (Patients with unstable angina/non-ST segment elevated myocardial infarction (UA/NSTEMI))The following data are based on a clinical study of bivalirudin in 13,819 patients with ACS; 4,612 were randomised to bivalirudin alone, 4,604 were randomised to bivalirudin plus GP IIb/IIIa inhibitor and 4,603 were randomised to either unfractionated heparin or enoxaparin plus GP IIb/IIIa inhibitor. Adverse reactions were more frequent in females and in patients more than 65 years of age in both the bivalirudin and the heparin-treated comparator groups compared to male or younger patients.Approximately 23.3% of patients receiving bivalirudin experienced at least one adverse event and 2.1% experienced an adverse reaction. Adverse event reactions for bivalirudin are listed by system organ class in Table 1.
Platelets, bleeding and clottingIn ACUITY, bleeding data were collected separately from adverse reactions.Major bleeding was defined as any one of the following: intracranial, retroperitoneal, intraocular, access site haemorrhage requiring radiological or surgical intervention, ≥5 cm diameter haematoma at puncture site, reduction in haemoglobin concentration of ≥4 g/dl without an overt source of bleeding, reduction in haemoglobin concentration of ≥3 g/dl with an overt source of bleeding, re-operation for bleeding or use of any blood product transfusion. Minor bleeding was defined as any observed bleeding event that did not meet the criteria as major. Minor bleeding occurred very commonly (≥1/10) and major bleeding occurred commonly (≥1/100 and <1/10).Major bleeding rates are shown in Table 6 for the IIT population and Table 7 for the per protocol population (patients receiving clopidogrel and acetylsalicylic acid). Both major and minor bleeds were significantly less frequent with bivalirudin alone than the heparin plus GP IIb/IIIa inhibitor and bivalirudin plus GP IIb/IIIa inhibitor groups. Similar reductions in bleeding were observed in patients who were switched to bivalirudin from heparin-based therapies (N = 2,078).Major bleeding occurred most frequently at the sheath puncture site. Other less frequently observed bleeding sites with greater than 0.1% (uncommon) bleeding included other puncture site, retroperitoneal, gastrointestinal, ear, nose or throat.Thrombocytopenia was reported in 10 bivalirudin-treated patients participating in the ACUITY study (0.1%). The majority of these patients received concomitant acetylsalicylic acid and clopidogrel, and 6 out of the 10 patients also received a GP IIb/IIIa inhibitor. Mortality among these patients was nil.The REPLACE-2 Trial (Patients undergoing PCI)The following data is based on a clinical study of bivalirudin in 6,000 patients undergoing PCI, half of whom were treated with bivalirudin (REPLACE-2). Adverse events were more frequent in females and in patients more than 65 years of age in both the bivalirudin and the heparin-treated comparator groups compared to male or younger patients.Approximately 30% of patients receiving bivalirudin experienced at least one adverse event and 3% experienced an adverse reaction. Adverse reactions for bivalirudin are listed by system organ class in Table 1.
Platelets, bleeding and clottingIn REPLACE-2, bleeding data were collected separately from adverse events. Major bleeding rates for the intent-to-treat trial population are shown in Table 6.Major bleeding was defined as the occurrence of any of the following: intracranial haemorrhage, retroperitoneal haemorrhage, blood loss leading to a transfusion of at least two units of whole blood or packed red blood cells, or bleeding resulting in a haemoglobin drop of more than 3 g/dl, or a fall in haemoglobin greater than 4 g/dl (or 12% of haematocrit) with no bleeding site identified. Minor haemorrhage was defined as any observed bleeding event that did not meet the criteria for a major haemorrhage. Minor bleeding occurred very commonly (≥1/10) and major bleeding occurred commonly (≥1/100 and <1/10).Both minor and major bleeds were significantly less frequent with bivalirudin than the heparin plus GP IIb/IIIa inhibitor comparator group. Major bleeding occurred most frequently at the sheath puncture site. Other less frequently observed bleeding sites with greater than 0.1% (uncommon) bleeding included other puncture site, retroperitoneal, gastrointestinal, ear, nose or throat.In REPLACE-2 thrombocytopenia occurred in 20 bivalirudin-treated patients (0.7%). The majority of these patients received concomitant acetylsalicylic acid and clopidogrel, and 10 out of 20 patients also received a GP IIb/IIIa inhibitor. Mortality among these patients was nil.
Acute cardiac eventsThe HORIZONS Trial (Patients with STEMI undergoing primary PCI)The following data are based on a clinical study of bivalirudin in patients with STEMI undergoing primary PCI; 1,800 patients were randomised to bivalirudin alone, 1,802 were randomised to heparin plus GP IIb/IIIa inhibitor. Serious adverse reactions were reported more frequently in the heparin plus GP IIb/IIIa group than the bivalirudin treated group.A total of 55.1% of patients receiving bivalirudin experienced at least one adverse event and 8.7% experienced an adverse drug reaction. Adverse drug reactions for bivalirudin are listed by system organ class in Table 1.The incidence of stent thrombosis within the first 24 hours was 1.5% in patients receiving bivalirudin versus 0.3% in patients receiving UFH plus GP IIb/IIIa inhibitor (p=0.0002). Two deaths occurred after acute stent thrombosis, 1 in each arm of the study. The incidence of stent thrombosis between 24 hours and 30 days was 1. 2% in patients receiving bivalirudin versus 1.9% in patients receiving UFH plus GP IIb/IIIa inhibitor (p=0.1553). A total of 17 deaths occurred after subacute stent thrombosis, 3 in the bivalirudin arm and 14 in the UFH plus GP IIb/IIIa arm. There was no statistically significant difference in the rates of stent thrombosis between treatment arms at 30 days (p=0.3257) and 1 year (p=0.7754).
Reporting of suspected adverse reactionsReporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard.
Mechanism of actionBivalirudin contains bivalirudin, a direct and specific thrombin inhibitor that binds both to the catalytic site and the anion-binding exosite of fluid-phase and clot-bound thrombin. Thrombin plays a central role in the thrombotic process, acting to cleave fibrinogen into fibrin monomers and to activate Factor XIII to Factor XIIIa, allowing fibrin to develop a covalently cross- linked framework that stabilises the thrombus. Thrombin also activates Factors V and VIII, promoting further thrombin generation, and activates platelets, stimulating aggregation and granule release. Bivalirudin inhibits each of these thrombin effects.The binding of bivalirudin to thrombin, and therefore its activity, is reversible as thrombin slowly cleaves the bivalirudin, Arg3-Pro4, bond, resulting in recovery of thrombin active site function. Thus, bivalirudin initially acts as a complete non-competitive inhibitor of thrombin, but transitions over time to become a competitive inhibitor enabling initially inhibited thrombin molecules to interact with other clotting substrates and to coagulation if required.In vitro studies have indicated that bivalirudin inhibits both soluble (free) and clot-bound thrombin. Bivalirudin remains active and is not neutralised by products of the platelet release reaction.In vitro studies have also shown that bivalirudin prolongs the activated partial thromboplastin time (aPTT) thrombin time (TT) and pro-thrombin time (PT) of normal human plasma in a concentration- dependent manner and that bivalirudin does not induce a platelet aggregation response against sera from patients with a history of Heparin-Induced Thrombocytopenia/Thrombosis Syndrome (HIT/HITTS).In healthy volunteers and patients, bivalirudin exhibits dose- and concentration-dependent anticoagulant activity as evidenced as prolongation of the ACT, aPTT, PT, INR and TT. Intravenous administration of bivalirudin produces measurable anticoagulation within minutes.
Pharmacodynamic effectsThe pharmacodynamic effects of bivalirudin may be assessed using measures of anticoagulation including the ACT. The ACT value is positively correlated with the dose and plasma concentration of bivalirudin administered. Data from 366 patients indicates that the ACT is unaffected by concomitant treatment with a GP IIb/IIIa inhibitor.
Clinical efficacy and safetyIn clinical studies bivalirudin has been shown to provide adequate anticoagulation during PCI procedures.The HORIZONS Trial (Patients with STEMI undergoing primary PCI)The HORIZONS trial was a prospective, dual arm, single blind, randomised, multi-centre trial to establish the safety and efficacy of bivalirudin in patients with STEMI undergoing a primary PCI strategy with stent implantation with either a slow release paclitaxel-eluding stent (TAXUS) or an otherwise identical uncoated bare metal stent (Express2). A total of 3,602 patients were randomised to receive either bivalirudin (1,800 patients) or unfractionated heparin plus a GP IIb/IIIa inhibitor (1,802 patients). All patients received acetylsalicylic acid and clopidogrel with twice as many patients (approximately 64%) receiving a 600mg loading dose of clopidogrel than a 300mg loading dose of clopidogrel. Approximately 66% of patients were pre-treated with unfractionated heparin.The dose of bivalirudin used in HORIZONS was the same as that used in the REPLACE-2 study (0.75 mg/kg bolus followed by a 1.75 mg/kg body weight/hour infusion). A total of 92.9% of patients treated underwent primary PCI as their primary management strategy.The analysis and results for the HORIZONS trial at 30 days for the overall (ITT) population is shown in Table 2.Results at 1 year were consistent with results at 30 days.Bleeding definitions and outcomes from the HORIZONS trial are shown in Table 6.Table 2. HORIZONS 30-day study results (intent-to-treat population)
|Endpoint||Bivalirudin (%)||Unfractionated heparin + GP IIb/IIIa inhibitor (%)||Relative Risk [95% CI]||p- value*|
|N = 1,800||N = 1,802|
|30 day Composite|
|MACE1||5.4||5.5||0.98 [0.75, 1.29]||0.8901|
|Major bleeding2||5.1||8.8||0.58 [0.45, 0.74]||<0.0001|
|All cause death||2.1||3.1||0.66 [0.44, 1.0]||0.0465|
|Reinfarction||1.9||1.8||1.06 [0.66, 1.72]||0.8003|
|Ischaemic target vessel revascularisation||2.5||1.9||1.29[0.83,1.99]||0.2561|
|Stroke||0.8||0.7||1.17 [0.54, 2.52]||0.6917|
|Overall population (ITT)|
|Arm A UFH/enox +GP IIb/IIIa inhibitor (N=4,603) %||Arm B bival +GP IIb/IIIa inhibitor (N=4,604) %||B A Risk diff.(95% CI)||Arm C bival alone (N=4,612) %||C A Risk diff.(95% CI)|
|Composite ischaemia||7.3||7.7||0.48 (-0.60, 1.55)||7.8||0.55 (-0.53, 1.63)|
|Death||1.3||1.5||0.17 (-0.31, 0.66)||1.6||0.26 (-0.23, 0.75)|
|MI||4.9||5.0||0.04 (-0.84, 0.93)||5.4||0.45 (-0.46, 1.35)|
|Unplanned revasc.||2.3||2.7||0.39 (-0.24, 1.03)||2.4||0.10 (-0.51, 0.72)|
|Composite ischaemia||15.3||15.9||0.65 (-0.83, 2.13)||16.0||0.71 (-0.77, 2.19)|
|Death||3.9||3.8||0.04 (-0.83, 0.74)||3.7||-0.18 (-0.96, 0.60)|
|MI||6.8||7.0||0.19 (-0.84, 1.23)||7.6||0.83 (-0.22, 1.89)|
|Unplanned revasc.||8.1||8.8||0.78 (-0.36, 1.92)||8.4||0.37 (-0.75, 1.50)|
|Patients receiving acetylsalicylic acid & clopidogrel as per protocol*|
|Arm A UFH/enox +GP IIb/IIIa inhibitor(N=2,842) %||Arm B bival +GP IIb/IIIa inhibitor(N=2,924) %||B A Risk diff.(95% CI)||Arm C bival alone (N=2,911) %||C A Risk diff.(95% CI)|
|Composite ischaemia||7.4||7.4||0.03 (-1.32, 1.38)||7.0||-0.35 (-1.68, 0.99)|
|Death||1.4||1.4||-0.00 (-0.60, 0.60)||1.2||-0.14 (-0.72, 0.45)|
|MI||4.8||4.9||0.04 (-1.07, 1.14)||4.7||-0.08 (-1.18, 1.02)|
|Unplanned revasc.||2.6||2.8||0.23 (-0.61, 1.08)||2.2||-0.41 (-1.20, 0.39)|
|Composite ischaemia||16.1||16.8||0.68 (-1.24, 2.59)||15.8||-0.35 (-2.24, 1.54)|
|Death||3.7||3.9||0.20 (-0.78, 1.19)||3.3||-0.36 (-1.31, 0.59)|
|MI||6.7||7.3||0.60 (-0.71, 1.91)||6.8||0.19 (-1.11, 1.48)|
|Unplanned revasc.||9.4||10.0||0.59 (-0.94, 2.12)||8.9||-0.53 (-2.02, 0.96)|
Table 5. REPLACE-2 study results: 30-day endpoints (intent-to-treat and per-protocol populations
|bivalirudin (N=2,994) %||heparin + GP IIb/IIIa inhibitor (N=3,008) %||bivalirudin (N=2,902) %||heparin + GP IIb/IIIa inhibitor (N=2,882) %|
|Major bleeding** (based on non-TIMI criteria - see section 4.8)||2.4||4.1||2.2||4.0|
Table 6. Major bleeding rates in clinical trials of bivalirudin 30 day endpoints for intent-to-treat populations
|Bivalirudin (%)||Bival + GP IIb/IIIa inhibitor (%)||UFH/Enox1 + GP IIb/IIIa inhibitor (%)|
|N = 2,994||N = 4,612||N = 1,800||N = 4,604||N = 3,008||N = 4,603||N = 1,802|
|Protocol defined major bleeding||2.4||3.0||5.1||5.3||4.1||5.7||8.8|
|TIMI Major (non-CABG) Bleeding||0.4||0.9||1.8||1.8||0.8||1.9||3.2|
Table 7. ACUITY trial; bleeding events up to day 30 for the population of patients who received acetylsalicylic acid and clopidogrel as per protocol*
|UFH/enox + GP IIb/IIIa inhibitor (N= 2,842) %||Bival + GP IIb/IIIa inhibitor (N=2,924) %||Bival alone ( N= 2,911) %|
|ACUITY scale major bleeding||5.9||5.4||3.1|
|TIMI scale major bleeding||1.9||1.9||0.8|
Paediatric populationIn clinical study TMC-BIV-07-01, the pharmacodynamic response as measured by ACT was consistent with adult studies. The ACT increased in all patients from neonates to older children as well as adults- with increasing bivalirudin concentrations. The ACT vs concentration data suggest a trend for a lower concentration response curve for adults as compared to older children (6 years to < 16 years) and younger children (2 years to <6 years), and for older children compared to infants (31 days to <24 months) and neonates (birth to 30 days). Pharmacodynamic models indicated that this effect is due to a higher baseline ACT in neonates and infants than in older children. However, the maximal ACT values for all groups (adults and all paediatric groups) converge at a similar level near an ACT of 400 seconds. The clinical utility of ACT in neonates and children should be considered with caution considering their developmental haematological state.Thrombotic (9/110, 8.2%) and major bleeding events (2/110, 1.8%) were observed in the study. Other frequently reported adverse events were decreased pedal pulse, catheter site haemorrhage, abnormal pulse, and nausea (8.2%, 7.3%, 6.4% and 5.5%, respectively). Five patients had a post-baseline nadir platelet count of <150,000 cells/mm3, representing a ≥50% decrease in platelets from baseline. All 5 events were associated with additional cardiac procedures employing heparin anticoagulation (n=3) or with infections (n=2). A population pharmacokinetic/pharmacodynamic analysis, and an Exposure and Adverse Event Assessment Model based on the data from this study determined that in paediatric patients, use of the adult dosing with plasma levels similar to that achieved in adults was associated with lower levels of thrombotic events with no impact on bleeding events (see section 4.2).
AbsorptionThe bioavailability of bivalirudin for intravenous use is complete and immediate. The mean steady- state concentration of bivalirudin following a constant intravenous infusion of 2.5 mg/kg/h is 12.4 µg/ml.
DistributionBivalirudin is rapidly distributed between plasma and extracellular fluid. The steady-state volume of distribution is 0.1 l/kg. Bivalirudin does not bind to plasma proteins (other than thrombin) or to red blood cells.
BiotransformationAs a peptide, bivalirudin is expected to undergo catabolism to its constituent amino acids, with subsequent recycling of the amino acid in the body pool. Bivalirudin is metabolized by proteases, including thrombin. The primary metabolite resulting from the cleavage of Arg3-Pro4 bond of the N- terminal sequence by thrombin is not active because of the loss of affinity to the catalytic active site of thrombin. About 20% of bivalirudin is excreted unchanged in the urine.
EliminationThe concentration-time profile following intravenous administration is well described by a two- compartment model. Elimination follows a first order process with a terminal half-life of 25 ± 12 minutes in patients with normal renal function. The corresponding clearance is about 3.4 ± 0.5 ml/min/kg.
Hepatic InsufficiencyThe pharmacokinetics of bivalirudin have not been studied in patients with hepatic impairment but are not expected to be altered because bivalirudin is not metabolized by liver enzymes such as cytochrome P-450 isozymes.
Renal InsufficiencyThe systemic clearance of bivalirudin decreases with glomerular filtration rate (GFR). The clearance of bivalirudin is similar in patients with normal renal function and those with mild renal impairment. Clearance is reduced by approximately 20% in patients with moderate or severe renal impairment, and 80% in dialysis-dependent patients (Table 8).
Table 8. Pharmacokinetic parameters for bivalirudin in patients with normal and impaired renal function
|Renal function (GFR)||Clearance (ml/min/kg)||Half-life (minutes)|
|Normal renal function (≥ 90ml/min)||3.4||25|
|Mild renal impairment (60-89 ml/min)||3.4||22|
|Moderate renal impairment (30-59 ml/min)||2.7||34|
|Severe renal impairment (10-29 ml/min)||2.8||57|
|Dialysis dependent patients (off-dialysis)||1.0||3.5 hours|
ElderlyPharmacokinetics have been evaluated in elderly patients as part of a renal pharmacokinetic study. Dose adjustments for this age group should be on the basis of renal function, see section 4.2.
GenderThere are no gender effects in the pharmacokinetics of bivalirudin.
Paediatric populationIn a clinical trial of 110 paediatric patients (neonates to <16 years of age) undergoing percutaneous intravascular procedures, the safety, pharmacokinetic and pharmacodynamic profile of bivalirudin was evaluated [TMC-BIV-07-01]. The approved adult weight-based intravenous bolus dose of 0.75 mg/kg followed by an infusion of 1.75 mg/kg/hour was studied and pharmacokinetic/pharmacodynamic analysis found a response similar to that of adults, although weight-normalized clearance (ml/min/kg) of bivalirudin was higher in neonates than in older children and decreased with increasing age.
Table 9. Medicinal products with dose concentration incompatibilities to bivalirudin.
|Medicinal products with dose concentration incompatibilities||Compatible concentrations||Incompatible concentrations|
|Dobutamine HCl||4 mg/ml||12.5 mg/ml|
|Famotidine||2 mg/ml||10 mg/ml|
|Haloperidol lactate||0.2 mg/ml||5 mg/ml|
|Labetalol HCl||2 mg/ml||5 mg/ml|
|Lorazepam||0.5 mg/ml||2 mg/ml|
|Promethazine HCl||2 mg/ml||25 mg/ml|
Instructions for preparationAseptic procedures should be used for the preparation and administration of Bivalirudin.Add 5 ml sterile water for injections to one vial of Bivalirudin and swirl gently until completely dissolved and the solution is clear. Reconstitution may require up to 3 or 4 minutes to be complete.Withdraw 5 ml from the vial, and further dilute in a total volume of 50 ml of glucose 5% solution for injection, or sodium chloride 9 mg/ml (0.9%) solution for injection to give a final bivalirudin concentration of 5 mg/ml.The reconstituted/diluted solution should be inspected visually for particulate matter and discolouration. Solutions containing particulate matter or discoloured solution should not be used.The reconstituted/diluted solution will be a clear to slightly opalescent, colourless to slightly yellow solution.Any unused product or waste material should be disposed of in accordance with local requirements.