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2017年8月30日，美国制药公司The Medicines Company表示，美国FDA批准了公司VABOMERE注射剂（美罗培南+VABOMERE）用于成人复杂性尿路感染（cUTI）的治疗，包括由敏感肠杆菌（大肠杆菌、克雷白氏杆菌、阴沟肠杆菌）引起的肾盂肾炎。VABOMERE由美罗培南（一种抗菌药物）和vaborbactam（可以抑制某些细菌的耐药性）组成。
See Full Prescribing Information for instructions for constituting supplied dry powder and subsequent required dilution. (2.3) See Full Prescribing Information for drug compatibilities. (2.4) DOSAGE FORMS AND STRENGTHS VABOMERE 2 grams (meropenem and vaborbactam) for injection, is supplied as a sterile powder for constitution in single‑dose vials containing meropenem 1 gram (equivalent to 1.14 grams of meropenem trihydrate) and vaborbactam1 gram. (3) CONTRAINDICATIONS Known hypersensitivity to the components of VABOMERE (meropenem and vaborbactam) or anaphylactic reactions to beta‑lactams. (4) WARNINGS AND PRECAUTIONS Hypersensitivity reactions were reported with the use of VABOMERE. Serious and occasionally fatal hypersensitivity (anaphylactic) reactions have been reported in patients receiving beta-lactam antibacterial drugs. Discontinue infusion if signs of acute hypersensitivity occur. (5.1) Seizures and other adverse Central Nervous System experiences have been reported during treatment with meropenem, a component of VABOMERE. (5.2) Clostridium difficile-associated diarrhea has been reported with nearly all systemic antibacterial agents, including VABOMERE. Evaluate patients if diarrhea occurs. (5.3) Co-administration of meropenem with valproic acid or divalproex sodium reduces the serum concentration of valproic acid potentially increasing the risk of breakthrough seizures. (5.4, 7.1) ADVERSE REACTIONS The most frequently reported adverse reactions occurring in ≥3% of patients treated with VABOMERE were headache, phlebitis/infusion site reactions, and diarrhea. (6.1) FULL PRESCRIBING INFORMATION: CONTENTS* 1 INDICATIONS AND USAGE 1.1 Complicated Urinary Tract Infections (cUTI), including Pyelonephritis VABOMERE™ is indicated for the treatment of patients 18 years of age and older with complicated urinary tract infections (cUTI) including pyelonephritis caused by the following susceptible microorganisms: Escherichia coli, Klebsiella pneumoniae, and Enterobacter cloacae species complex. 1.2 Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of VABOMERE and other antibacterial drugs, VABOMERE should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy. 2 DOSAGE AND ADMINISTRATION 2.1 Recommended Dosage The recommended dosage of VABOMERE is 4 grams (meropenem 2 grams and vaborbactam 2 grams) administered every 8 hours by intravenous (IV) infusion over 3 hours in patients 18 years of age and older with an estimated glomerular filtration rate (eGFR) greater than or equal to 50 mL/min/1.73m2. The duration of treatment is for up to 14 days. 2.2 Dosage Adjustments in Patients with Renal Impairment Dosage adjustment is recommended in patients with renal impairment who have an eGFR less than 50 mL/min/1.73m2. The recommended dosage of VABOMERE in patients with varying degrees of renal function is presented in Table 1. For patients with changing renal function, monitor serum creatinine concentrations and eGFR at least daily and adjust the dosage of VABOMERE accordingly [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3)]. Meropenem and vaborbactam are removed by hemodialysis [see Clinical Pharmacology (12.3)]. For patients maintained on hemodialysis, administer VABOMERE after a hemodialysis session. Table 1: Dosage of VABOMERE in Patients with Renal Impairment
b All doses of VABOMERE are administered intravenously over 3 hours. c Doses adjusted for renal impairment should be administered after a hemodialysis session. d The total duration of treatment is for up to 14 days. 2.3 Preparation and Administration of VABOMERE for Intravenous Infusion Preparation VABOMERE is supplied as a dry powder in a single-dose vial that must be constituted and further diluted prior to intravenous infusion as outlined below. VABOMERE does not contain preservatives. Aseptic technique must be used for constitution and dilution. To prepare the required dose for intravenous infusion, constitute the appropriate number of vials, as determined from Table 2 below. Withdraw 20 mL of 0.9% Sodium Chloride Injection, USP, from an infusion bag and constitute each vial of VABOMERE. Mix gently to dissolve. The constituted VABOMERE solution will have an approximate meropenem concentration of 0.05 gram/mL and an approximate vaborbactam concentration of 0.05 gram/mL. The final volume is approximately 21.3 mL. The constituted solution is not for direct injection. The constituted solution must be diluted further, immediately, in a 0.9% Sodium Chloride Injection, USP infusion bag before intravenous infusion. The intravenous infusion of the diluted solution must be completed within 4 hours if stored at room temperature or 22 hours if stored refrigerated at 2°C to 8°C (36°F to 46°F). To dilute the constituted solution, withdraw the full or partial constituted vial contents from each vial and add it back into the infusion bag in accordance with Table 2 below. After dilution, the final infusion concentration of meropenem and vaborbactam will be approximately between 2 mg/mL and 8 mg/mL. Table 2: Preparation of VABOMERE Doses
2.4 Drug Compatibility VABOMERE solution for administration by 3‑hour infusion is only compatible with 0.9% Sodium Chloride Injection, USP Compatibility of VABOMERE solution for administration with other drugs has not been established. 3 DOSAGE FORMS AND STRENGTHS VABOMERE 2 grams (meropenem and vaborbactam) for injection, is supplied as a white to light yellow sterile powder for constitution in single‑dose, clear glass vials containing meropenem 1 gram (equivalent to 1.14 grams meropenem trihydrate) and vaborbactam 1 gram. 4 CONTRAINDICATIONS VABOMERE is contraindicated in patients with known hypersensitivity to any components of VABOMERE (meropenem and vaborbactam), or to other drugs in the same class or in patients who have demonstrated anaphylactic reactions to beta-lactam antibacterial drugs [see Warnings and Precautions (5.1)]. 5 WARNINGS AND PRECAUTIONS 5.1 Hypersensitivity Reactions Hypersensitivity reactions were reported in patients treated with VABOMERE in the clinical trials [see Adverse Reactions (6.1)]. Serious and occasionally fatal hypersensitivity (anaphylactic) reactions and serious skin reactions have been reported in patients receiving therapy with beta-lactam antibacterial drugs. These reactions are more likely to occur in individuals with a history of sensitivity to multiple allergens. There have been reports of individuals with a history of penicillin hypersensitivity who have experienced severe hypersensitivity reactions when treated with another beta-lactam antibacterial drug. Before initiating therapy with VABOMERE, it is important to inquire about previous hypersensitivity reactions to penicillins, cephalosporins, other beta-lactam antibacterial drugs, and other allergens. If an allergic reaction to VABOMERE occurs, discontinue the drug immediately. 5.2 Seizure Potential Seizures and other adverse Central Nervous System (CNS) experiences have been reported during treatment with meropenem, which is a component of VABOMERE. These experiences have occurred most commonly in patients with CNS disorders (e.g., brain lesions or history of seizures) or with bacterial meningitis and/or compromised renal function [see Adverse Reactions (6.1) and Drug Interactions (7.1)]. Close adherence to the recommended dosage regimens is urged, especially in patients with known factors that predispose to convulsive activity. Continue anti-convulsant therapy in patients with known seizure disorders. If focal tremors, myoclonus, or seizures occur, evaluate neurologically, place on anti-convulsant therapy if not already instituted, and reexamine the dosage of VABOMERE to determine whether it should be decreased or discontinued. 5.3 Clostridium difficile-associated Diarrhe Clostridium difficile-associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including VABOMERE, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile. C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin‑producing isolates of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibacterial drug use. Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents. If CDAD is suspected or confirmed, ongoing antibacterial drug use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibacterial drug treatment of C. difficile, and surgical evaluation should be instituted as clinically indicated. 5.4 Risk of Breakthrough Seizures Due to Drug Interaction with Valproic Acid The concomitant use of VABOMERE and valproic acid or divalproex sodium is generally not recommended. Case reports in the literature have shown that co- administration of carbapenems, including meropenem, to patients receiving valproic acid or divalproex sodium results in a reduction in valproic acid concentrations. The valproic acid concentrations may drop below the therapeutic range as a result of this interaction, therefore increasing the risk of breakthrough seizures. Increasing the dose of valproic acid or divalproex sodium may not be sufficient to overcome this interaction. Consider administration of antibacterial drugs other than carbapenems to treat infections in patients whose seizures are well controlled on valproic acid or divalproex sodium. If administration of VABOMERE is necessary, consider supplemental anticonvulsant therapy [see Drug Interactions (7.1)] . 5.5 Thrombocytopenia In patients with renal impairment, thrombocytopenia has been observed in patients treated with meropenem, but no clinical bleeding has been reported [see Dosage and Administration (2.2), Adverse Reactions (6.1), Use in Specific Populations (8.5) and (8.6), and Clinical Pharmacology (12.3)] . 5.6 Potential for Neuromotor Impairment Alert patients receiving VABOMERE on an outpatient basis regarding adverse reactions such as seizures, delirium, headaches and/or paresthesias that could interfere with mental alertness and/or cause motor impairment. Until it is reasonably well established that VABOMERE is well tolerated, advise patients not to operate machinery or motorized vehicles [see Adverse Reactions (6.1) ]. 5.7 Development of Drug-Resistant Bacteria Prescribing VABOMERE in the absence of a proven or strongly suspected bacterial infection is unlikely to provide benefit to the patient and increases the risk of drug-resistant bacteria [see Indications and Usage (1.2)]. 5.8 Overgrowth of Nonsusceptible Organisms As with other antibacterial drugs, prolonged use of VABOMERE may result in overgrowth of nonsusceptible organisms. Repeated evaluation of the patient is essential. If superinfection does occur during therapy, appropriate measures should be taken. 6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in the Warnings and Precautions section: Hypersensitivity Reactions [see Warnings and Precautions (5.1)] Seizure Potential [see Warnings and Precautions (5.2)] Clostridium difficile-associated Diarrhea [see Warnings and Precautions (5.3)] Risk of Breakthrough Seizures Due to Drug Interaction with Valproic Acid [see Warnings and Precautions (5.4)] Thrombocytopenia [see Warnings and Precautions (5.5)] Potential for Neuromotor Impairment [see Warnings and Precautions (5.6)] Development of Drug-Resistant Bacteria [see Warnings and Precautions (5.7)] Overgrowth of Nonsusceptible Organisms [see Warnings and Precautions (5.8)] 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. VABOMERE was evaluated in a Phase 3 comparator-controlled clinical trial in cUTI, including pyelonephritis, which included 272 patients treated with VABOMERE and 273 patients treated with the comparator piperacillin/tazobactam 4.5 grams (piperacillin 4 g/tazobactam 0.5 g) every 8 hours. After a minimum of 15 doses of IV therapy, patients could be switched to oral levofloxacin (500 mg daily every 24 hours) to complete the treatment course. Mean duration of IV therapy was 8 days in both treatment groups. Mean duration of IV and oral therapy was 10 days; patients with baseline bacteremia could receive up to 14 days of treatment. The mean age of patients treated with VABOMERE was 53 years (range 18 to 92 years), and 32% of patients were 65 years of age or older. Patients were predominantly female (66.5%) and White (93.4%). Most patients were enrolled in Europe (89.7%). Serious Adverse Reactions and Adverse Reactions Leading to Discontinuation Treatment was discontinued due to adverse reactions in 2.9% (8/272) of patients receiving VABOMERE and in 5.1% (14/273) of patients receiving piperacillin/tazobactam. Most common adverse reactions resulting in discontinuation of VABOMERE included hypersensitivity, 1.1% (3/272) and infusion-related reactions, 0.7% (2/272). Death occurred in 2 (0.7%) patients who received VABOMERE and in 2 (0.7%) patients who received piperacillin/tazobactam. Common Adverse Reactions The most frequently reported adverse reactions (3% or greater) in patients receiving VABOMERE in the Phase 3 cUTI trial were headache, phlebitis/infusion site reactions, and diarrhea. Table 3 provides adverse reactions occurring in 1% or greater of patients receiving VABOMERE in the Phase 3 cUTI trial. Table 3: Adverse Reactions Occurring in 1% or Greater of Patients Receiving VABOMERE in the Phase 3 Clinical Trial in cUTI
b Infusion site reactions include infusion/injection site phlebitis, infusion site thrombosis, and infusion site erythema. c Hypersensitivity includes hypersensitivity, drug hypersensitivity, anaphylactic reaction, rash urticaria, and bronchospasm Adverse Reactions Occurring in Less Than 1% of Patients Receiving VABOMERE in the Phase 3 cUTI trial: Blood and lymphatic system disorders: leukopenia General disorders and administration site conditions: chest discomfort Infections and infestations: pharyngitis, vulvovaginal candidiasis, oral candidiasis Investigations: creatinine phosphokinase increase Metabolism and nutrition disorders: decreased appetite, hyperkalemia, hyperglycemia, hypoglycemia Nervous system disorders: dizziness, tremor, paresthesia, lethargy Psychiatric disorders: hallucination, insomnia Renal and urinary disorders: azotemia, renal impairment Vascular disorders: deep vein thrombosis, hypotension, vascular pain Other Adverse Reactions Associated with Meropenem Additionally, adverse reactions reported with meropenem alone that were not reported in VABOMERE-treated patients in the Phase 3 clinical trial are listed below: Blood and lymphatic system disorders: thrombocytosis, neutropenia, eosinophilia, thrombocytopenia, agranulocytosis, hemolytic anemia Gastrointestinal disorders: abdominal pain Hepatobiliary disorders: jaundice Nervous system disorders: convulsions Investigations: blood alkaline phosphatase increased, blood lactate dehydrogenase increased, blood bilirubin increased, blood creatinine increased, blood urea increased, blood thromboplastin decreased, prothrombin time decreased, Direct and Indirect Coombs test positive Skin and subcutaneous tissue disorders: pruritus, toxic epidermal necrolysis, Stevens Johnson syndrome, Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) syndrome, erythema multiforme Immune system disorders: angioedema General disorders and administration site conditions: pain 7 DRUG INTERACTIONS 7.1 Valproic Acid Case reports in the literature have shown that co-administration of carbapenems, including meropenem, to patients receiving valproic acid or divalproex sodium results in a reduction in valproic acid concentrations. The valproic acid concentrations may drop below the therapeutic range as a result of this interaction, therefore increasing the risk of breakthrough seizures. Although the mechanism of this interaction is unknown, data from in vitro and animal studies suggest that carbapenems may inhibit the hydrolysis of valproic acid’s glucuronide metabolite (VPA‑g) back to valproic acid, thus decreasing the serum concentrations of valproic acid. If administration of VABOMERE is necessary, then supplemental anti‑convulsant therapy should be considered [see Warnings and Precautions (5.4)]. 7.2 Probenecid Probenecid competes with meropenem for active tubular secretion, resulting in increased plasma concentrations of meropenem. Co‑administration of probenecid with VABOMERE is not recommended. 8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy Risk Summary Fetal malformations were observed in vaborbactam-treated rabbits, therefore advise pregnant women of the potential risks to the fetus. There are insufficient human data to establish whether there is a drug-associated risk of major birth defects or miscarriages with VABOMERE, meropenem, or vaborbactam in pregnant women. Malformations (supernumerary lung lobes, interventricular septal defect) were observed in offspring from pregnant rabbits administered intravenous vaborbactam during the period of organogenesis at doses approximately equivalent to or above the maximum recommended human dose (MRHD) based on plasma AUC comparison. The clinical relevance of the malformations is uncertain. No similar malformations or fetal toxicity were observed in offspring from pregnant rats administered intravenous vaborbactam during organogenesis or from late pregnancy and through lactation at a dose equivalent to approximately 1.6 times the MRHD based on body surface area comparison [see Data]. No fetal toxicity or malformations were observed in pregnant rats and cynomolgus monkeys administered intravenous meropenem during organogenesis at doses up to 1.6 and 1.2 times the MRHD based on body surface area comparison, respectively. In rats administered intravenous meropenem in late pregnancy and during the lactation period, there were no adverse effects on offspring at doses equivalent to approximately 1.6 times the MRHD based on body surface area comparison [see Data]. The background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15‑20%, respectively. Data Animal Data Meropenem Reproductive studies have been performed with meropenem in rats at doses of up to 1000 mg/kg/day and in cynomolgus monkeys at doses of up to 360 mg/kg/day (on the basis of body surface area comparisons, approximately 1.6 times and 1.2 times higher, respectively, than the MRHD of 2 grams every 8 hours). These studies revealed no evidence of harm to the fetus due to meropenem, although there were slight changes in fetal body weight at doses of 250 mg/kg/day (equivalent to approximately 0.4 times the MRHD of 2 grams every 8 hours based on body surface area comparison) and above in rats. In a published study1, meropenem administered to pregnant rats from Gestation Day 6 to Gestation Day 17, was associated with mild maternal weight loss at all doses, but did not produce malformations or fetal toxicity. The no-observed-adverse-effect-level (NOAEL) for fetal toxicity in this study was considered to be the high dose of 750 mg/kg/day (equivalent to approximately 1.2 times the MRHD based on body surface area comparison). In a peri-postnatal study in rats described in the published literature1, intravenous meropenem was administered to dams from Gestation Day 17 until Postpartum Day 21. There were no adverse effects in the dams and no adverse effects in the first generation offspring (including developmental, behavioral, and functional assessments and reproductive parameters) except that female offspring exhibited lowered body weights which continued during gestation and nursing of the second generation offspring. Second generation offspring showed no meropenem-related effects. The NOAEL value was considered to be 1000 mg/kg/day (approximately 1.6 times the MRHD based on body surface area comparisons). Vaborbactam In a rat embryo-fetal toxicology study, intravenous administration of vaborbactam during Gestation Days 6‑17 showed no evidence of maternal or embryofetal toxicity at doses up to 1000 mg/kg, which is equivalent to approximately 1.6 times the MRHD based on body surface area comparisons. In the rabbit, intravenous administration of vaborbactam during Gestation Days 7–19 at doses up to 1000 mg/kg/day (approximately 5 times the MRHD based on AUC exposure comparison) was not associated with maternal toxicity or fetal weight loss. A low incidence of malformations occurred in the 300 mg/kg/day mid-dose group (two fetuses from different litters with interventricular septal defects, one fetus with a fused right lung lobe and one fetus with a supernumerary lung lobe), and in the 1000 mg/kg/day high-dose group (two fetuses from different litters with supernumerary lobes). The NOAEL was considered to be 100 mg/kg/day which is equivalent to 0.3 times the MRHD based on plasma AUC exposure comparison and 6-times the MRHD based on maximum plasma concentration (Cmax) comparison. The clinical relevance of the malformations is uncertain. Vaborbactam Cmax values may have influenced malformations in the rabbit study, and the recommended 3-hour infusion time for clinical administration of vaborbactam is associated with lower plasma Cmax values than the 30-minute infusions in rabbits. In a peri-postnatal study in rats, vaborbactam administered intravenously to pregnant dams from Gestation Day 6 to Lactation Day 20 caused no adverse effects on the dams, or in first and second generation offspring. The NOAEL was considered to be 1000 mg/kg/day (equivalent to approximately 1.6 times the MRHD based on body surface area comparison). 8.2 Lactation Meropenem has been reported to be excreted in human milk. It is unknown whether vaborbactam is excreted in human milk. No information is available on the effects of meropenem and vaborbactam on the breast-fed child or on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for VABOMERE and any potential adverse effects on the breast-fed child from VABOMERE or from the underlying maternal condition. 8.4 Pediatric Use The safety and effectiveness of VABOMERE in pediatric patients (younger than 18 years of age) has not been established. Studies of VABOMERE have not been conducted in patients younger than 18 years of age. 8.5 Geriatric Use Of the 272 patients treated with VABOMERE in the Phase 3 cUTI trial, 48 (18%) patients were 65 years of age and older, while 39 (14%) patients were 75 years of age and older. No overall differences in safety or effectiveness were observed between these patients and younger patients, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out. Meropenem, a component of VABOMERE, is known to be substantially excreted by the kidney, and the risk of adverse reactions to this drug may be greater in patients with renal impairment. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function. Population pharmacokinetic (PK) analysis found no clinically relevant change in pharmacokinetic parameters in elderly patients. No dosage adjustment based on age is required. Dosage adjustment for elderly patients should be based on renal function [see Dosage and Administration (2.2) and Clinical Pharmacology (12.3)] . 8.6 Renal Impairment Pharmacokinetic studies conducted with meropenem and vaborbactam in subjects with renal impairment have shown that the plasma exposures of both meropenem and vaborbactam increased with decreasing renal function [see Clinical Pharmacology (12.3)]. Dosage adjustment for VABOMERE is recommended in patients with renal impairment (eGFR less than 50 mL/min/1.73m2) [see Dosage and Administration (2.2)]. For patients with changing renal function, monitor serum creatinine concentrations and eGFR at least daily and adjust the dosage of VABOMERE accordingly. Meropenem and vaborbactam are removed by hemodialysis. Following a single dose of VABOMERE, vaborbactam exposure was substantially greater when VABOMERE was administered after hemodialysis than before hemodialysis [see Clinical Pharmacology (12.3)]. 10 OVERDOSAGE In the event of overdose, discontinue VABOMERE and institute general supportive treatment. Meropenem and vaborbactam can be removed by hemodialysis. In subjects with end-stage renal disease (ESRD) administered meropenem 1 gram and vaborbactam 1 gram, the mean total recovery in dialysate following a hemodialysis session was 38% and 53% of the administered dose of meropenem and vaborbactam, respectively. No clinical information is available on the use of hemodialysis to treat VABOMERE overdosage. 11 DESCRIPTION VABOMERE (meropenem and vaborbactam) for injection is a combination product that contains meropenem, a synthetic penem antibacterial drug and vaborbactam, a cyclic boronic acid beta-lactamase inhibitor, for intravenous administration. Meropenem, present as a trihydrate, is a white to light yellow crystalline powder, with a molecular weight of 437.52. The chemical name for meropenem trihydrate is (4R,5S,6S)-3-[[(3S,5S)-5-(dimethylcarbamoyl)-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, trihydrate. The empirical formula of meropenem trihydrate is C17H25N3O5S·3H2O and its chemical structure is: Figure 1: Structure of Meropenem Trihydrate
Vaborbactam is a white to off-white powder, with a molecular weight of 297.14. The chemical name for vaborbactam is (3R,6S)-2-hydroxy-3-[[2-(2-thienyl)acetyl]amino]-1,2-oxaborinane-6-acetic acid. Its empirical formula is C12H16BNO5S and its chemical structure is:
VABOMERE is supplied as a white to light yellow sterile powder for constitution that contains meropenem trihydrate, vaborbactam, and sodium carbonate. Each 50 mL glass vial contains 1 gram of meropenem (equivalent to 1.14 grams of meropenem trihydrate), 1 gram of vaborbactam, and 0.575 gram of sodium carbonate. The total sodium content of the mixture is approximately 0.25 grams (10.9 mEq)/vial.
a Meropenem 2 grams and vaborbactam 2 grams administered as a 3-hour infusion b AUC0-inf reported for single-dose administration; AUC0-8 reported for multiple-dose administration; AUC0 – 24 is 414 mg•h/L for meropenem and 588 mg•h/L for vaborbactam. The maximum plasma concentration (Cmax) and area under the plasma drug concentration time curve (AUC) of meropenem and vaborbactam proportionally increased with dose across the dose range studied (1 gram to 2 grams for meropenem and 0.25 grams to 2 grams for vaborbactam) when administered as a single 3‑hour intravenous infusion. There is no accumulation of meropenem or vaborbactam following multiple intravenous infusions administered every 8 hours for 7 days in subjects with normal renal function. The mean population PK parameters of meropenem and vaborbactam in 295 patients (including 35 patients with reduced renal function) after 3-hour infusions of VABOMERE 4 grams (meropenem 2 grams and vaborbactam 2 grams) administered every 8 hours (or dose adjusted based on renal function) are summarized in Table 5. Table 5: Population Pharmacokinetic Parameters (Mean [SD]) of Meropenem and Vaborbactam Following Administration of VABOMERE 4 grams (meropenem 2 grams and vaborbactam 2 grams) by 3‑hour Infusion in Patientsa
Distribution The plasma protein binding of meropenem is approximately 2%. The plasma protein binding of vaborbactam is approximately 33%. The steady‑state volumes of distribution of meropenem and vaborbactam in patients were 20.2 L and 18.6 L, respectively. Elimination The clearance of meropenem in healthy subjects following multiple doses is 15.1 L/h and for vaborbactam is 10.9 L/h. The t 1/2 is 1.22 hours and 1.68 hours for meropenem and vaborbactam, respectively. Metabolism A minor pathway of meropenem elimination is hydrolysis of the beta‑lactam ring (meropenem open lactam), which accounts for 22% of a dose eliminated via the urine. Vaborbactam does not undergo metabolism. Excretion Both meropenem and vaborbactam are primarily excreted via the kidneys. Approximately 40–60% of a meropenem dose is excreted unchanged within 24‑48 hours with a further 22% recovered as the microbiologically inactive hydrolysis product. The mean renal clearance for meropenem was 7.8 L/h. The mean non‑renal clearance for meropenem was 7.3 L/h which comprises both fecal elimination (~2% of dose) and degradation due to hydrolysis. For vaborbactam, 75 to 95% of the dose was excreted unchanged in the urine over a 24 to 48 hour period. The mean renal clearance for vaborbactam was 8.9 L/h. The mean non‑renal clearance for vaborbactam was 2.0 L/h indicating nearly complete elimination of vaborbactam by the renal route. Specific Populations Patients with Renal Impairment Following a single dose of VABOMERE, pharmacokinetic studies with meropenem and vaborbactam in subjects with renal impairment have shown that meropenem AUC0-inf ratios to subjects with normal renal function are 1.28, 2.07, and 4.63 for subjects with mild (eGFR of 60 to 89 mL/min/1.73m2), moderate (eGFR of 30 to 59 mL/min/1.73m2), and severe (eGFR <30 mL/min/1.73m2) renal impairment, respectively; vaborbactam AUC0-inf ratios to subjects with normal renal function are 1.18, 2.31, and 7.8 for subjects with mild, moderate, and severe renal impairment, respectively [see Dosing and Administration (2.2)] . Hemodialysis removed 38% of the meropenem dose and 53% of the vaborbactam dose. Vaborbactam exposure was high in subjects with ESRD (eGFR <15 ml/min/1.73 m2). Vaborbactam exposure was higher when VABOMERE was administered after hemodialysis (AUC0-inf ratio to subjects with normal renal function of 37.5) than when VABOMERE was administered before hemodialysis (AUC0-inf ratio to subjects with normal renal function of 10.2) [see Use in Specific Populations (8.6) and Dosing and Administration (2.2)] . Patients with Hepatic Impairment A pharmacokinetic study conducted with an intravenous formulation of meropenem in patients with hepatic impairment has shown no effects of liver disease on the pharmacokinetics of meropenem. Vaborbactam does not undergo hepatic metabolism. Therefore, the systemic clearance of meropenem and vaborbactam is not expected to be affected by hepatic impairment. Geriatric Patients In elderly patients with renal impairment, plasma clearances of meropenem and vaborbactam were reduced, correlating with age‑associated reduction in renal function [see Dosage and Administration (2.2) and Use in Specific Populations (8.5)] . Male and Female Patients Meropenem and vaborbactam Cmax and AUC were similar between males and females using a population pharmacokinetic analysis. Racial or Ethnic Groups No significant difference in mean meropenem or vaborbactam clearance was observed across race groups using a population pharmacokinetic analysis. Drug Interactions No drug-drug interaction was observed between meropenem and vaborbactam in clinical studies with healthy subjects. Based upon the in vitro and in vivo data available to date, there is a low potential for clinically significant drug interactions with vaborbactam. Vaborbactam at clinically relevant concentrations does not inhibit the cytochrome P450 isoforms CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, and CYP3A4 in vitro human liver microsomes. Vaborbactam showed no potential for in vitro induction of CYP1A2, CYP2B6, and CYP3A4 in human hepatocytes. Studies evaluating the potential for meropenem to interact with CYP450 enzymes or active transport systems have not been conducted. However, carbapenems as a class have not shown the potential for inhibition or induction CYP450 enzymes and clinical experience suggests that such effects are unlikely. Vaborbactam does not inhibit the following hepatic and renal transporters in vitro at clinically relevant concentrations: P‑gp, BCRP, OAT1, OAT3, OCT1, OCT2, OATP1B1, OATP1B3 or BSEP. Vaborbactam was not a substrate of OAT1, OAT3, OCT2, P‑gp, and BCRP. Meropenem is a substrate of OAT1 and OAT3 and as such, probenecid competes with meropenem for active tubular secretion and thus inhibits the renal excretion of meropenem. Following administration of probenecid with meropenem, the mean systemic exposure increased 56% and the mean elimination half-life increased 38% [see Drug Interactions (7.2)]. Concomitant administration of meropenem and valproic acid has been associated with reductions in valproic acid concentrations with subsequent loss in seizure control [see Drug Interactions (7.1)]. 12.4 Microbiology Mechanism of Action The meropenem component of VABOMERE is a penem antibacterial drug. The bactericidal action of meropenem results from the inhibition of cell wall synthesis. Meropenem penetrates the cell wall of most gram-positive and gram-negative bacteria to bind penicillin-binding protein (PBP) targets. Meropenem is stable to hydrolysis by most beta‑lactamases, including penicillinases and cephalosporinases produced by gram‑negative and gram‑positive bacteria, with the exception of carbapenem hydrolyzing beta‑lactamases. The vaborbactam component of VABOMERE is a non‑suicidal beta-lactamase inhibitor that protects meropenem from degradation by certain serine beta-lactamases such as Klebsiella pneumoniae carbapenemase (KPC). Vaborbactam does not have any antibacterial activity. Vaborbactam does not decrease the activity of meropenem against meropenem-susceptible organisms. Resistance Mechanisms of beta-lactam resistance may include the production of beta-lactamases, modification of PBPs by gene acquisition or target alteration, up-regulation of efflux pumps, and loss of outer membrane porin. VABOMERE may not have activity against gram‑negative bacteria that have porin mutations combined with overexpression of efflux pumps. Clinical isolates may produce multiple beta-lactamases, express varying levels of beta-lactamases, or have amino acid sequence variations, and other resistance mechanisms that have not been identified. Culture and susceptibility information and local epidemiology should be considered in selecting or modifying antibacterial therapy. VABOMERE demonstrated in vitro activity against Enterobacteriaceae in the presence of some beta-lactamases and extended-spectrum beta-lactamases (ESBLs) of the following groups: KPC, SME, TEM, SHV, CTX‑M, CMY, and ACT. VABOMERE is not active against bacteria that produce metallo‑beta lactamases or oxacillinases with carbapenemase activity. In the Phase 3 cUTI trial with VABOMERE, some isolates of E. coli, K. pneumoniae, E. cloacae, C. freundii, P. mirabilis, P. stuartii that produced beta‑lactamases, were susceptible to VABOMERE (minimum inhibitory concentration ≤4 mcg /mL). These isolates produced one or more beta‑lactamases of the following enzyme groups: OXA (non‑carbapenemases), KPC, CTX-M, TEM, SHV, CMY, and ACT. Some beta-lactamases were also produced by an isolate of K. pneumoniae that was not susceptible to VABOMERE (minimum inhibitory concentration ≥32 mcg/mL). This isolate produced beta-lactamases of the following enzyme groups: CTX-M, TEM, SHV, and OXA. No cross-resistance with other classes of antimicrobials has been identified. Some isolates resistant to carbapenems (including meropenem) and to cephalosporins may be susceptible to VABOMERE. Interaction with Other Antimicrobials In vitro synergy studies have not demonstrated antagonism between VABOMERE and levofloxacin, tigecycline, polymyxin, amikacin, vancomycin, azithromycin, daptomycin, or linezolid. Activity against Meropenem Non-susceptible Bacteria in Animal Infection Models Vaborbactam restored activity of meropenem in animal models of infection (e.g., mouse thigh infection, urinary tract infection and pulmonary infection) caused by some meropenem non-susceptible KPC-producing Enterobacteriaceae. Antimicrobial Activity VABOMERE has been shown to be active against most isolates of the following bacteria, both in vitro and in clinical infections [see Indications and Usage (1.1)]. Gram-negative bacteria: Enterobacter cloacae species complex Escherichia coli Klebsiella pneumoniae The following in vitro data are available, but their clinical significance is unknown. At least 90 percent of the following bacteria exhibit an in vitro MIC less than or equal to the susceptible breakpoint for VABOMERE against isolates of a similar genus or organism group. However, the efficacy of VABOMERE in treating clinical infections due to these bacteria has not been established in adequate and well-controlled clinical trials. Gram-negative bacteria: Citrobacter freundii Citrobacter koseri Enterobacter aerogenes Klebsiella oxytoca Morganella morganii Proteus mirabilis Providencia spp. Pseudomonas aeruginosa Serratia marcescens Susceptibility Test Methods When available, the clinical microbiology laboratory should provide cumulative reports of in vitro susceptibility test results for antimicrobial drugs used in local hospitals and practice areas as periodic reports that describe the susceptibility profile of nosocomial and community-acquired pathogens. These reports should aid in selecting the most appropriate antibacterial drug for treatment. Dilution Techniques Quantitative methods are used to determine antimicrobial MICs. These MICs provide estimates of the susceptibility of bacteria to antimicrobial compounds. The MICs should be determined using a standardized test method2,3 (broth and/or agar). The MIC values should be determined using serial dilutions of meropenem combined with a fixed concentration of 8 mcg/mL of vaborbactam. The MIC values should be interpreted according to the criteria in Table 6. Diffusion Techniques Quantitative methods that require measurement of zone diameters can also provide reproducible estimates of the susceptibility of bacteria to antimicrobial compounds. The zone size should be determined using a standardized method3,4. This procedure uses paper disks impregnated with 20 mcg of meropenem and 10 mcg vaborbactam to test the susceptibility of bacteria to meropenem and vaborbactam. The disk breakpoints are provided in Table 6. Table 6: Susceptibility Interpretive Criteria for Meropenem/Vaborbactam
A report of Susceptible (S) indicates that the antimicrobial drug is likely to inhibit growth of the pathogen if the antimicrobial drug reaches the concentration usually achievable at the site of infection. A report of Intermediate (I) indicates that the result should be considered equivocal, and, if the microorganism is not fully susceptible to alternative, clinically feasible drugs, the test should be repeated. This category implies possible clinical applicability in body sites where the drug is physiologically concentrated or in situations where a high dosage of the drug can be used. This category also provides a buffer zone that prevents small uncontrolled technical factors from causing major discrepancies in interpretation. A report of Resistant (R) indicates that the antimicrobial drug is not likely to inhibit growth of the pathogen if the antimicrobial drug reaches the concentrations usually achievable at the infection site; other therapy should be selected. Quality Control Standardized susceptibility test procedures require the use of laboratory controls to monitor and ensure the accuracy of supplies and reagents used in the assay, and the techniques of the individuals performing the test2,3,4. Standard meropenem and vaborbactam powder should provide the following range of MIC values noted in Table 7. For the diffusion technique using the 20 mcg meropenem/10 mcg vaborbactam disk, the criteria in Table 6 should be achieved. Table 7: Acceptable Quality Control Ranges for Meropenem/Vaborbactam
*KPC‑producing K. pneumoniae included for the QC of vaborbactam activity 13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility Carcinogenesis Long-term carcinogenicity studies have not been performed with VABOMERE, meropenem, or vaborbactam. Mutagenesis Meropenem Genetic toxicity studies were performed with meropenem using the bacterial reverse mutation test, the Chinese hamster ovary HGPRT assay, cultured human lymphocytes cytogenic assay, and the mouse micronucleus test. There was no evidence of mutation potential found in any of these tests. Vaborbactam Genetic toxicity studies were performed with vaborbactam using the bacterial reverse mutation test, chromosomal aberration test and the mouse micronucleus test. There was no evidence of mutagenic potential found in any of these tests. Impairment of Fertility Meropenem Reproductive studies were performed with meropenem in male and female rats at doses up to 1000 mg/kg/day with no evidence of impaired fertility (approximately equivalent to 1.6 times the MRHD based on body surface area comparison). In a reproductive study in cynomolgus monkeys at doses of meropenem up to 360 mg/kg/day (on the basis of body surface area comparison, approximately equivalent to 1.2 times the MRHD) no reproductive toxicity was seen. Vaborbactam Vaborbactam had no adverse effect on fertility in male and female rats at doses up to 1000 mg/kg/day, which is equivalent to approximately 1.6 times the MRHD based on body surface area comparison. 14 CLINICAL STUDIES 14.1 Complicated Urinary Tract Infections (cUTI), including Pyelonephritis A total of 545 adults with cUTI, including pyelonephritis were randomized into a double‑blind, double dummy, multi‑center trial comparing VABOMERE (meropenem 2 grams and vaborbactam 2 grams) to piperacillin/tazobactam (piperacillin 4 grams/tazobactam 0.5 grams) intravenously every 8 hours. Switch to an oral antibacterial drug, such as levofloxacin was allowed after a minimum of 15 doses of IV therapy. The microbiologically modified intent to treat population (m‑MITT) included all randomized patients who received any study drug and had at least 1 baseline uropathogen. Clinical and microbiological response at the end of IV treatment (EOIVT) required both a clinical outcome of cure or improvement and a microbiologic outcome of eradication (all baseline uropathogens at >105 CFU/mL are to be reduced to <104 CFU/mL). Clinical and microbiological response was also assessed at the Test of Cure (TOC) visit (approximately 7 days after completion of treatment) in the m‑MITT population and required both a clinical outcome of cure and a microbiological outcome of eradication. Patient demographic and baseline characteristics were balanced between treatment groups in the m‑MITT population. Approximately 93% of patients were Caucasian and 66% were females in both treatment groups. The mean age was 54 years with 32% and 42% patients greater than 65 years of age in VABOMERE and piperacillin/tazobactam treatment groups, respectively. Mean body mass index was approximately 26.5 kg/m2 in both treatment groups. Concomitant bacteremia was identified in 12 (6%) and 15 (8%) patients at baseline in VABOMERE and piperacillin/tazobactam treatment groups respectively. The proportion of patients with diabetes mellitus at baseline was 17% and 19% in VABOMERE and piperacillin/tazobactam treatment groups, respectively. The majority of patients (approximately 90%) were enrolled from Europe, and approximately 2% of patients were enrolled from North America. Overall, in both treatment groups, 59% of patients had pyelonephritis and 40% had cUTI, with 21% and 19% of patients having a non-removable and removable source of infection, respectively. Mean duration of IV treatment in both treatment groups was 8 days and mean total treatment duration (IV and oral) was 10 days; patients with baseline bacteremia could receive up to 14 days of therapy. Approximately 10% of patients in each treatment group in the m-MITT population had a levofloxacin-resistant pathogen at baseline and received levofloxacin as the oral switch therapy. This protocol violation may have impacted the assessment of the outcomes at the TOC visit. These patients were not excluded from the analysis presented in Table 8, as the decision to switch to oral levofloxacin was based on post-randomization factors. VABOMERE demonstrated efficacy with regard to clinical and microbiological response at the EOIVT visit and TOC visits in the m‑MITT population as shown in Table 8. Table 8: Clinical and Microbiological Response Rates in a Phase 3 Trial of cUTI Including Pyelonephritis (m‑MITT Population)
End of IV Treatment visit includes patients with organisms resistant to piperacillin/tazobactam at baseline Test of Cure visit excludes patients with organisms resistant to piperacillin/tazobactam at baseline In the m-MITT population, the rate of clinical and microbiological response in VABOMERE- treated patients with concurrent bacteremia at baseline was 10/12 (83.3%). In a subset of the E. coli and K. pneumoniae isolates, genotypic testing identified certain ESBL groups (e.g., TEM, CTX-M, SHV and OXA) in both treatment groups of the Phase 3 cUTI trial. The rates of clinical and microbiological response were similar in the ESBL-positive and ESBL-negative subset at EOIVT; at TOC, clinical and microbiological response was lower in the ESBL-positive as compared to ESBL-negative subset in both treatment groups. 15 REFERENCES Kawamura S, Russell AW, Freeman SJ, and Siddall, RA: Reproductive and Developmental Toxicity of Meropenem in Rats. Chemotherapy, 40:S238-250 (1992). Clinical and Laboratory Standards Institute (CLSI). Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria that Grow Aerobically; Approved Standard‑Tenth Edition. CLSI document M07‑A10, Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2015. Clinical and Laboratory Standards Institute (CLSI). Performance Standards for Antimicrobial Susceptibility Testing; Twenty‑seventh Informational Supplement, CLSI document M100‑S27, Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2017. Clinical and Laboratory Standards Institute (CLSI). Performance Standards for Antimicrobial Disk Diffusion Susceptibility Tests; Approved Standard‑Twelfth Edition. CLSI document M02-A12, Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2015. 16 HOW SUPPLIED/STORAGE AND HANDLING VABOMERE 2 grams (meropenem and vaborbactam) for injection is supplied as a white to light yellow sterile powder for constitution in single‑dose, clear glass vials (NDC 65293‑009‑01) sealed with a rubber stopper (not made with natural rubber latex) and an aluminum overseal. Each vial is supplied in cartons of 6 vials (NDC 65293‑009‑06). Each vial contains 1 gram of meropenem (equivalent to 1.14 grams of meropenem trihydrate), 1 gram of vaborbactam, and 0.575 gram of sodium carbonate. Store VABOMERE vials at 20°C to 25°C (68°F to 77°F); excursions are permitted to 15°C to 30°C (59°F to 86°F) [see USP, Controlled Room Temperature (CRT)]. 17 PATIENT COUNSELING INFORMATION Serious Allergic Reactions Advise patients that allergic reactions, including serious allergic reactions, could occur and that serious reactions require immediate treatment. Ask patient about any previous hypersensitivity reactions to VABOMERE (meropenem and vaborbactam), penicillins, cephalosporins, other beta‑lactams, or other allergens [see Warnings and Precautions (5.1)]. Seizures Patients receiving VABOMERE on an outpatient basis must be alerted of adverse events such as seizures, delirium, headaches and/or paresthesias that could interfere with mental alertness and/or cause motor impairment. Until it is reasonably well established that VABOMERE is well tolerated, patients should not operate machinery or motorized vehicles [see Warnings and Precautions (5.2)]. Potentially Serious Diarrhea Counsel patients that diarrhea is a common problem caused by antibacterial drugs including VABOMERE, which usually ends when the antibacterial drug is discontinued. Sometimes after starting treatment with antibacterial drugs, patients can develop watery and bloody stools (with or without stomach cramps and fever) even as late as two or more months after having taken the last dose of the antibacterial drug. If this occurs, patients should contact their physician as soon as possible [see Warnings and Precautions (5.3)]. Interaction with Valproic Acid Counsel patients to inform their physician if they are taking valproic acid or divalproex sodium. Valproic acid concentrations in the blood may drop below the therapeutic range upon co- administration with VABOMERE. If treatment with VABOMERE is necessary and continued, alternative or supplemental anti‑convulsant medication to prevent and/or treat seizures may be needed [see Warnings and Precautions (5.4)] . Antibacterial Resistance Counsel patients that antibacterial drugs, including VABOMERE, should only be used to treat bacterial infections. They do not treat viral infections (e.g., the common cold). When VABOMERE is prescribed to treat a bacterial infection, tell patients that although it is common to feel better early in the course of therapy, take the medication exactly as directed. Skipping doses or not completing the full course of therapy may (1) decrease the effectiveness of the immediate treatment and (2) increase the likelihood that bacteria will develop resistance and will not be treatable by VABOMERE or other antibacterial drugs in the future [see Warnings and Precautions (5.7)] . | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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VABOMERE(meropenem and vaborbactam for injection)简介：
2017年8月30日，美国制药公司The Medicines Company表示，美国FDA批准了公司VABOMERE注射剂（美罗培南+VABOMERE）用于成人复杂性尿路感染（cUTI）的治疗，包括由敏感肠杆菌（大肠杆菌、克雷白氏杆菌、阴 ... 责任编辑：p53 |
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