RECARBRIO

RECARBRIO (imipenem, cilastatin, and relebactam) for injection is an antibacterial combination product consisting of imipenem, a carbapenem antibacterial drug, cilastatin, a renal dehydropeptidase inhibitor, and relebactam, a diazabicyclooctane beta-lactamase inhibitor, for intravenous administration. Imipenem Imipenem is a beta lactam antibacterial drug. Imipenem (N-formimidoylthienamycin monohydrate) is a crystalline derivative of thienamycin, which is produced by Streptomyces cattleya . The chemical name is (5 R ,6 S )-3-[[2-(formimidoylamino)ethyl]thio]-6-[( R )-1-hydroxyethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid monohydrate. It is an off-white, non-hygroscopic crystalline compound, sparingly soluble in water. The empirical formula is C 12 H 17 N 3 O 4 S∙H 2 O and the molecular weight is 317.37. Figure 1: Chemical structure of imipenem Chemical Structure Cilastatin Cilastatin sodium is the sodium salt of a derivatized heptenoic acid. The chemical name is sodium ( Z )-7-[[( R )-2-amino-2-carboxyethyl]thio]-2-[( S )-2,2-dimethylcyclopropanecarboxamido]-2-heptenoate. It is an off-white to white, hygroscopic, amorphous compound, very soluble in water. The empirical formula is C 16 H 25 N 2 NaO 5 S and the molecular weight is 380.44. Figure 2: Chemical structure of cilastatin sodium Chemical Structure Relebactam Relebactam is a beta-lactamase inhibitor. It is a crystalline monohydrate. The chemical name is (1 R ,2 S ,5 R )-7-oxo-2-(piperidin-1-ium-4-ylcarbamoyl)-1,6-diazabicyclo[3.2.1]octan-6-yl sulfate hydrate. It is a white to off-white powder, soluble in water. The empirical formula is C 12 H 20 N 4 O 6 S∙H 2 O and the molecular weight is 366.39. Figure 3: Chemical structure of relebactam RECARBRIO is supplied as a white to light yellow sterile powder for constitution in a single-dose vial containing 500 mg imipenem (equivalent to 530 mg imipenem monohydrate), 500 mg cilastatin (equivalent to 531 mg cilastatin sodium), and 250 mg relebactam (equivalent to 263 mg relebactam monohydrate). Each vial of RECARBRIO is buffered with 20 mg sodium bicarbonate to provide solutions in the pH range of 6.5 to 7.6. The total sodium content of the mixture in the vial is 37.5 mg (1.6 mEq). Solutions of RECARBRIO range from colorless to yellow. Variations of color within this range do not affect the potency of the product. Chemical Structure

RECARBRIO is a combination of imipenem, a penem antibacterial, cilastatin, a renal dehydropeptidase inhibitor, and relebactam, a beta-lactamase inhibitor, indicated in adult and pediatric patients weighing at least 2 kg for the treatment of the following infections caused by susceptible gram-negative microorganisms: Hospital-acquired bacterial pneumonia and ventilator-associated bacterial pneumonia (HABP/VABP). ( 1.1 ) Complicated urinary tract infections, including pyelonephritis (cUTI) in patients who have limited or no alternative treatment options. ( 1.2 ) Complicated intra-abdominal infections (cIAI) in patients who have limited or no alternative treatment options. ( 1.3 ) Approval of the cUTI and cIAI indications is based on limited clinical safety and efficacy data for RECARBRIO. ( 1.2 , 1.3 , 14 ) Limitations of Use RECARBRIO is not recommended in pediatric patients less than 37 weeks post-menstrual age (gestational age at birth plus post-natal age). ( 1.4 , 2.2 ). RECARBRIO is not recommended in pediatric patients weighing less than 30 kg with renal impairment. ( 1.4 , 2.3 ). Usage to Reduce Development of Drug-Resistant Bacteria To reduce the development of drug-resistant bacteria and maintain the effectiveness of RECARBRIO and other antibacterial drugs, RECARBRIO should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria. ( 1.5 ) 1.1 Hospital-acquired Bacterial Pneumonia and Ventilator-associated Bacterial Pneumonia (HABP/VABP) RECARBRIO ® is indicated in adult and pediatric patients weighing at least 2 kg for the treatment of hospital-acquired bacterial pneumonia and ventilator-associated bacterial pneumonia, caused by the following susceptible gram-negative microorganisms: Acinetobacter calcoaceticus-baumannii complex, Enterobacter cloacae , Escherichia coli , Haemophilus influenzae , Klebsiella aerogenes, Klebsiella oxytoca, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Serratia marcescens. 1.2 Complicated Urinary Tract Infections (cUTI), including Pyelonephritis RECARBRIO is indicated in adult and pediatric patients weighing at least 2 kg who have limited or no alternative treatment options, for the treatment of complicated urinary tract infections (cUTI), including pyelonephritis, caused by the following susceptible gram-negative microorganisms: Enterobacter cloacae , Escherichia coli , Klebsiella aerogenes, Klebsiella pneumoniae, and Pseudomonas aeruginosa . Approval of this indication is based on limited clinical safety and efficacy data for RECARBRIO [see Clinical Studies (14.2) ] . 1.3 Complicated Intra-abdominal Infections (cIAI) RECARBRIO is indicated in adult and pediatric patients weighing at least 2 kg who have limited or no alternative treatment options for the treatment of complicated intra-abdominal infections (cIAI) caused by the following susceptible gram-negative microorganisms: Bacteroides caccae , Bacteroides fragilis , Bacteroides ovatus , Bacteroides stercoris , Bacteroides thetaiotaomicron , Bacteroides uniformis , Bacteroides vulgatus , Citrobacter freundii , Enterobacter cloacae , Escherichia coli , Fusobacterium nucleatum , Klebsiella aerogenes, Klebsiella oxytoca , Klebsiella pneumoniae , Parabacteroides distasonis , and Pseudomonas aeruginosa . Approval of this indication is based on limited clinical safety and efficacy data for RECARBRIO [see Clinical Studies (14.2) ] . 1.4 Limitations of Use RECARBRIO is not recommended in pediatric patients less than 37 weeks post-menstrual age (gestational age at birth plus post-natal age) [see Dosage and Administration (2.2) and Use in Specific Populations (8.4) ] . RECARBRIO is not recommended in pediatric patients weighing less than 30 kg with renal impairment [see Dosage and Administration (2.4) , Use in Specific Populations (8.4 , 8.6) and Clinical Pharmacology (12.3) ]. 1.5 Usage to Reduce Development of Drug-Resistant Bacteria To reduce the development of drug-resistant bacteria and maintain the effectiveness of RECARBRIO and other antibacterial drugs, RECARBRIO 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.

Adult Patients: The recommended dosage of RECARBRIO is 1.25 grams (imipenem 500 mg, cilastatin 500 mg, relebactam 250 mg) administered by intravenous (IV) infusion over 30 minutes every 6 hours to adult patients with creatinine clearance (CLcr) 90 mL/min or greater. ( 2.1 ) Pediatric Patients weighing at least 2 kg: The recommended dosage of RECARBRIO for pediatric patients weighing at least 2kg varies by patient weight and age, with specific dosing recommendations as shown in the table below, ( 2.2 ): Recommended Dosage of RECARBRIO In Pediatric Patients Weighing at Least 2 kg Age Range Body Weight Dose Dosing Frequency Infusion Duration Birth Pediatric patients from birth (includes pediatric patients at least 37 weeks post-menstrual age) to less than 3 months 2 kg or greater RECARBRIO 37.5 Provides 15 mg/kg imipenem, 15 mg/kg cilastatin, and 7.5 mg/kg relebactam mg/kg Every 8 hours 60 minutes 3 months to less than 18 years less than 30 kg RECARBRIO 37.5 mg/kg Every 6 hours 60 minutes 3 months to less than 18 years 30 kg or greater RECARBRIO 1.25 Provides 500 mg imipenem, 500 mg cilastatin, and 250 mg, relebactam grams Every 6 hours 30 minutes Dose reduction is required in adult and pediatric (weighing at least 30 kg) patients with renal impairment. ( 2.3 , 2.4 ) Do not administer RECARBRIO to adults with CLcr less than 15 mL/min unless hemodialysis is instituted within 48 hours after dose administration. ( 2.3 ) Do not administer RECARBRIO to pediatric patients weighing at least 30 kg with an eGFR less than 15 mL/min/1.73m 2 unless hemodialysis is instituted within 48 hours after dose administration. ( 2.4 ) See Full Prescribing Information for instructions for constituting supplied dry powder and subsequent required dilution. ( 2.5 ) See Full Prescribing Information for drug compatibilities and incompatibilities. ( 2.7 , 2.8 ) 2.1 Recommended Dosage in Adult Patients The recommended dosage of RECARBRIO is 1.25 grams (imipenem 500 mg, cilastatin 500 mg, and relebactam 250 mg) administered by intravenous (IV) infusion over 30 minutes every 6 hours in adult patients with creatinine clearance (CLcr) of 90 mL/min or greater). The recommended duration of treatment with RECARBRIO is 4 days to 14 days. The duration of therapy should be guided by the severity and location of infection and clinical response. 2.2 Recommended Dosage in Pediatric Patients Weighing at Least 2 kg The recommended dosage of RECARBRIO in pediatric patients weighing at least 2 kg varies by patient weight and age, with specific dosing recommendations shown in Table 1 . The recommended duration of treatment with RECARBRIO is 4 days to 14 days. The duration of therapy should be guided by the severity and location of infection and clinical response. RECARBRIO is not recommended in pediatric patients less than 37 weeks post-menstrual age (gestational age at birth plus post-natal age ) [see Indications and Usage (1.4) and Use in Specific Populations (8.4) ]. RECARBRIO is not recommended for pediatric patients weighing less than 30 kg with renal impairment [see Dosage and administration (2.4) and Use in Specific Populations (8.4) ] . Table 1: Recommended Dosage of RECARBRIO In Pediatric Patients Weighing at Least 2 kg Age Range Body Weight Dose Dosing Frequency Infusion Duration Birth Pediatric patients from birth (includes pediatric patients at least 37 weeks post-menstrual age) to less than 3 months 2 kg or greater RECARBRIO 37.5 Provides 15 mg/kg imipenem, 15 mg/kg cilastatin, and 7.5 mg/kg relebactam mg/kg Every 8 hours 60 minutes 3 months to less than 18 years less than 30 kg RECARBRIO 37.5 mg/kg Every 6 hours 60 minutes 3 months to less than 18 years 30 kg or greater RECARBRIO 1.25 Provides 500 mg imipenem, 500 mg cilastatin, and 250 mg, relebactam grams Every 6 hours 30 minutes 2.3 Recommended Dosage in Adult Patients with Renal Impairment Adult patients who have a CLcr less than 90 mL/min require dosage reduction of RECARBRIO. The recommended dosage of RECARBRIO in adult patients with renal impairment is shown in Table 2 . Table 2: Recommended Dosage of RECARBRIO in Adult Patients with Renal Impairment Creatinine Clearance (CLcr) ([mL/min)] CLcr calculated using the Cockcroft-Gault formula for adult patients. Dose RECARBRIO is provided as a single vial in a fixed-dose combination; the dose for each component will be adjusted equally during preparation [see Dosage and Administration (2.5) ] . Dosing Frequency Infusion Duration 60 to 89 RECARBRIO 1 gram Provides 400 mg imipenem, 400 mg cilastatin, and 200 mg relebactam Every 6 hours 30 minutes 30 to 59 RECARBRIO 0.75 grams Provides 300 mg imipenem, 300 mg cilastatin, and 150 mg relebactam Every 6 hours 30 minutes 15 to 29 not receiving hemodialysis RECARBRIO 0.5 grams Provides 200 mg imipenem, 200 mg cilastatin, and 100 mg relebactam Every 6 hours 30 minutes Receiving hemodialysis Administration should be timed to follow hemodialysis and at intervals timed from the end of that hemodialysis session. RECARBRIO 0.5 grams Every 6 hours 30 minutes Less than 15 not receiving hemodialysis Not recommended Do not administer RECARBRIO to adult patients with CLcr less than 15 mL/min unless hemodialysis is instituted within 48 hours after dose administration. Imipenem, cilastatin, and relebactam are cleared from the circulation during hemodialysis. For adult patients maintained on hemodialysis, administer the recommended dose of RECARBRIO after hemodialysis and at intervals timed from the end of that hemodialysis session. There is inadequate information to recommend dosage of RECARBRIO for adults undergoing peritoneal dialysis. 2.4 Recommended Dosage in Pediatric Patients Weighing at Least 30 kg with Renal Impairment Pediatric patients weighing at least 30 kg who have an estimated glomerular filtration rate (eGFR) less than 90 mL/min/1.73m 2 require dosage reduction of RECARBRIO. The recommended dosage of RECARBRIO in pediatric patients weighing at least 30 kg with renal impairment is shown in Table 3 . There is insufficient information to recommend a dosage of RECARBRIO for pediatric patients weighing less than 30 kg with any degree of renal impairment. Table 3. Recommended Dosage of RECARBRIO in Pediatric Patients Weighing at Least 30 kg with Renal Impairment eGFR (mL/min/1.73 m 2 ) Calculated using a GFR estimating equation validated in pediatric patients weighing at least 30 kg. Recommended Dose RECARBRIO is provided as a single vial in a fixed-dose combination; the dose for each component will be adjusted equally during preparation [see Dosage and Administration (2.5) ] . Dosing Frequency Infusion Duration 60 to 89 RECARBRIO 1 gram Provides 400 mg imipenem, 400 mg cilastatin, and 200 mg relebactam Every 6 hours 30 minutes 30 to 59 RECARBRIO 0.75 grams Provides 300 mg imipenem, 300 mg cilastatin, and 150 mg relebactam Every 6 hours 30 minutes 15 to 29 not receiving hemodialysis RECARBRIO 0.5 grams Provides 200 mg imipenem, 200 mg cilastatin, and 100 mg relebactam Every 6 hours 30 minutes Receiving hemodialysis Administration should be timed to follow hemodialysis and at intervals timed from the end of that hemodialysis session. RECARBRIO 0.5 grams Every 6 hours 30 minutes Less than 15 not receiving hemodialysis Not recommended Do not administer RECARBRIO to pediatric patients weighing at least 30 kg with an eGFR less than 15 mL/min/1.73m 2 unless hemodialysis is instituted within 48 hours after dose administration. Imipenem, cilastatin, and relebactam are cleared from the circulation during hemodialysis. For pediatric patients weighing at least 30 kg maintained on hemodialysis, administer the recommended dose of RECARBRIO after hemodialysis and at intervals timed from the end of that hemodialysis session. There is inadequate information to recommend a dosage of RECARBRIO for pediatric patients undergoing peritoneal dialysis. 2.5 Preparation of RECARBRIO Solution for Intravenous Administration RECARBRIO is supplied as a dry powder in a single-dose vial that must be constituted and further diluted using aseptic technique prior to intravenous infusion. To prepare the infusion solution, contents of the vial must be constituted with the appropriate diluent as instructed below. A list of appropriate diluents is as follows: 0.9% Sodium Chloride Injection, USP 5% Dextrose Injection, USP 5% Dextrose Injection, USP + 0.9% Sodium Chloride Injection, USP 5% Dextrose Injection, USP + 0.45% Sodium Chloride Injection, USP 5% Dextrose Injection, USP + 0.225% Sodium Chloride Injection, USP RECARBRIO has low aqueous solubility. To ensure complete dissolution of RECARBRIO it is important to adhere to the following instructions: Step 1) For diluents available in 100 mL prefilled infusion bags, proceed to step 2. For diluents not available in 100 mL prefilled infusion bags, aseptically withdraw 100 mL of the desired diluent and transfer it to an empty infusion bag, then proceed to step 2. Step 2) Withdraw 20 mL (as two 10 mL aliquots) of diluent from the appropriate infusion bag and constitute the vial with one 10 mL aliquot of the diluent. The constituted suspension is for intravenous infusion only after dilution in an appropriate infusion solution. Step 3) After constitution, shake vial well and transfer resulting suspension into the remaining 80 mL of the infusion bag. Step 4) Add the second 10 mL aliquot of infusion diluent to the vial and shake well to ensure complete transfer of vial contents; repeat transfer of the resulting suspension to the infusion solution before administering. Agitate the resulting mixture until clear. Constituted solutions of RECARBRIO range from colorless to yellow. Variations of color within this range do not affect the potency of the product. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Discard if discoloration or visible particles are observed. The above instructions for preparation of RECARBRIO solution for intravenous administration must be followed for all patients, irrespective of the intended patient’s renal function, age or weight. The volume of this prepared RECARBRIO solution to be administered in adult and pediatric (weighing at least 30 kg) patients is determined based on estimated renal function [see Dosage and Administration (2.6) ] . The volume of the prepared RECARBRIO solution to be administered to pediatric patients weighing 2 kg to less than 30 kg with normal renal function is calculated based on patient weight using the formula below [see Dosage and Administration (2.2) ]: To achieve the appropriate infusion volume, withdraw and discard the excess (100 mL minus the infusion volume) from the prepared 100 mL solution. The remaining volume is the appropriate infusion volume. Figure 2.6 Preparation of RECARBRIO Solution for Intravenous Administration in Adult and Pediatric Patients Weighing at Least 30 kg with Renal Impairment Prepare a reduced dose of RECARBRIO (1 gram, 0.75 grams, or 0.5 grams) [see Dosage and Administration (2.3 , 2.4) ] by preparing a 100 mL solution containing 1.25 grams as described above [see Dosage and Administration (2.5) ] then withdrawing and discarding the excess according to Table 4 . Table 4: Preparation of Reduced RECARBRIO Doses for Intravenous Administration in Adult and Pediatric Patients Weighing at Least 30 kg with Renal Impairment Estimated Renal Function Creatinine Clearance (mL/min) Calculated using the Cockcroft-Gault formula for adult patients Or Estimated Glomerular Filtration Rate eGFR (mL/min/1.73 m 2 ) Calculated using a GFR estimating equation validated in pediatric patients weighing at least 30 kg Dose After preparation as instructed above, remove from the 100 mL prepared bag the volume indicated below and discard Resulting volume that provides the indicated reduced dose 60 to 89 RECARBRIO 1 gram Provides 400 mg imipenem, 400 mg cilastatin, and 200 mg relebactam 20 mL 80 mL 30 to 59 RECARBRIO 0.75 grams Provides 300 mg imipenem, 300 mg cilastatin, and 150 mg relebactam 40 mL 60 mL 15 to 29 not receiving hemodialysis RECARBRIO 0.5 grams Provides 200 mg imipenem, 200 mg cilastatin, and 100 mg relebactam 60 mL 40 mL Receiving hemodialysis RECARBRIO 0.5 grams 60 mL 40 mL 2.7 Storage of Constituted Solution RECARBRIO, as supplied in single-dose glass vials upon constitution with the appropriate diluent and following further dilution in the infusion bag, maintains satisfactory potency for at least 2 hours at room temperature (up to 30°C) or for at least 24 hours under refrigeration at 2°C to 8°C (36°F to 46°F). Do not freeze solutions of RECARBRIO. 2.8 Compatible Injectable Drug Products Compatible Drug Products The physical compatibility of RECARBRIO with selected injectable drug products was evaluated in two commonly available diluents. Compatible drugs with the corresponding compatible diluent (i.e., 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP) are listed below. RECARBRIO should not be co-administered through the same intravenous line (or cannula), with other drug products not listed below, as no compatibility data are available. Refer to the respective prescribing information of the co-administered drug(s) to confirm compatibility of simultaneous co-administration. List of Compatible Injectable Drugs for use with 5% Dextrose USP or 0.9% Sodium Chloride USP Injection as Diluents dexmedetomidine dopamine epinephrine fentanyl heparin midazolam norepinephrine phenylephrine 2.9 Incompatible Injectable Drug Products RECARBRIO for injection for intravenous infusion is physically incompatible with propofol in 5% Dextrose USP or 0.9% Sodium Chloride USP.

RECARBRIO is contraindicated in patients with a history of known severe hypersensitivity (severe systemic allergic reaction such as anaphylaxis) to any component of RECARBRIO. RECARBRIO is contraindicated in patients with a history of known severe hypersensitivity to any component of RECARBRIO. ( 4 )

The following serious adverse reactions are described in greater detail in the Warnings and Precautions section. Hypersensitivity Reactions [see Warnings and Precautions (5.1) ] Seizures and Other Central Nervous System Adverse Reactions [see Warnings and Precautions (5.2) ] Increased Seizure Potential Due to Interaction with Valproic Acid [see Warnings and Precautions (5.3) ] Clostridioides difficile -Associated Diarrhea (CDAD) [see Warnings and Precautions (5.4) ] Adult HABP/VABP Patients: The most frequently reported adverse reactions occurring in greater than or equal to 5% of patients treated with RECARBRIO were aspartate aminotransferase increased, anemia, alanine aminotransferase increased, diarrhea, hypokalemia, and hyponatremia. ( 6 ) Adult cUTI and cIAI Patients: The most frequently reported adverse reactions occurring in greater than or equal to 2% of patients treated with imipenem/cilastatin plus relebactam 250 mg, the components of RECARBRIO, were diarrhea, nausea, headache, vomiting, alanine aminotransferase increased, aspartate aminotransferase increased, phlebitis/infusion site reactions, pyrexia, and hypertension. ( 6 ) Pediatric HABP/VABP, cUTI, and cIAI Patients: The most frequently reported adverse reactions occurring in greater than 3% of pediatric patients treated with RECARBRIO were vomiting, diarrhea, nausea, headache, phlebitis/infusion site reactions, and rash. To report SUSPECTED ADVERSE REACTIONS, contact Merck Sharp & Dohme LLC at 1-877-888-4231 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Adult Patients Overview of the Safety Evaluation of RECARBRIO in Adult Patients Safety was primarily evaluated in three active-controlled, double-blind trials in HABP/VABP, cUTI, and cIAI (Trials 1, 2, and 3, respectively). In the HABP/VABP trial (Trial 1), patients were treated with either RECARBRIO or piperacillin and tazobactam (4.5 grams). In the cUTI trial (Trial 2) and cIAI trial (Trial 3), patients in the treatment arms were treated with either imipenem 500 mg/cilastatin 500 mg and relebactam 250 mg or imipenem 500 mg/cilastatin 500 mg and relebactam 125 mg (not an approved dose), and patients in the control arm were treated with imipenem 500 mg/cilastatin 500 mg plus placebo (IV normal saline). Across Trials 2 and 3, the mean duration of IV therapy in patients treated with imipenem/cilastatin plus relebactam 250 mg was approximately 7 days. Clinical Trial Experience in Adult Patients with HABP/VABP Trial 1 included 266 adult patients treated with RECARBRIO and 269 patients treated with piperacillin and tazobactam (4.5 grams) administered intravenously over 30 minutes every 6 hours. The mean age was 60 years, 43% of patients were 65 years of age and older, 31% were female and 22% had polymicrobial infection. The mean Acute Physiology and Chronic Health Evaluation (APACHE) II score was 15 and 48% of patients had an APACHE II score greater than or equal to 15 at baseline. Overall, 260 (49%) patients were ventilated at enrollment, including 194 (36%) patients with VABP and 66 (12%) patients with ventilated HABP. Clinical Trial Experience in Adult Patients with cUTI including, Pyelonephritis Trial 2 included 198 adult patients treated with imipenem/cilastatin and relebactam (99 patients each with imipenem 500 mg/cilastatin 500 mg plus relebactam 125 mg or relebactam 250 mg) and 100 patients treated with imipenem 500 mg/cilastatin 500 mg, administered intravenously over 30 minutes every 6 hours. After a minimum of 4 days of IV therapy, patients could be switched to oral ciprofloxacin (500 mg daily every 12 hours) to complete the treatment course of 4 to 14 days total (IV plus oral), at the discretion of the investigator. The mean age was 56 years, 40% of patients were 65 years of age and older, 16% were 75 years of age and older, 50% were female, and approximately 18% had moderate to severe renal impairment. Clinical Trial Experience in Adult Patients with cIAI Trial 3 included 233 adult patients treated with imipenem/cilastatin plus relebactam (116 subjects with imipenem 500 mg/cilastatin 500 mg and relebactam 125 mg and 117 subjects with imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg), and 114 patients treated with imipenem 500 mg/cilastatin 500 mg, administered intravenously over 30 minutes every 6 hours for 4 to 14 days, at the discretion of the investigator. The mean age was 49 years, 23% of the patients were 65 years of age and older, 9.8% were 75 years of age and older, and 42% were female. Serious Adverse Reactions and Adverse Reactions Leading to Discontinuation in Adult Patients In Trial 1, serious adverse reactions occurred in 27% (71/266) of patients receiving RECARBRIO and 32% (86/269) of patients receiving piperacillin and tazobactam. Adverse reactions leading to death were reported in 15% (40/266) of patients receiving RECARBRIO and 21% (57/269) of patients receiving piperacillin and tazobactam. Adverse reactions leading to discontinuation occurred in 5.6% (15/266) of patients receiving imipenem 500 mg/cilastatin 500 mg/relebactam 250 mg and 8.2% (22/269) of patients receiving piperacillin and tazobactam. In Trials 2 and 3, serious adverse reactions occurred in 3.2% (7/216) of patients receiving imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg and 5.1% (11/214) of patients receiving imipenem 500 mg/cilastatin 500 mg. There were no deaths reported in patients receiving imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg or imipenem 500 mg/cilastatin 500 mg alone. Deaths were reported in 1.4% (3/215) of patients receiving imipenem 500 mg/cilastatin 500 mg plus relebactam 125 mg (not an approved dose). Adverse reactions leading to discontinuation occurred in 1.9% (4/216) of patients receiving imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg and 2.3% (5/214) of patients receiving imipenem 500 mg/cilastatin 500 mg. Common Adverse Reactions in Adult Patients In Trial 1, adverse reactions occurred during the protocol-specified follow-up period, which was IV therapy plus 14 days following completion of therapy, in 85% (226/266) of patients receiving RECARBRIO and 87% (233/269) of patients receiving piperacillin and tazobactam. Table 5 lists the most common adverse reactions occurring in ≥4% of patients receiving imipenem 500 mg/cilastatin 500 mg/relebactam 250 mg or piperacillin and tazobactam in Trial 1. Table 5: Adverse Reactions Occurring in Greater Than or Equal to 4% of HABP/VABP Adult Patients Receiving RECARBRIO in Trial 1 Adverse Reaction RECARBRIO RECARBRIO, IV every 6 hours. (N=266) N (%) Piperacillin/Tazobactam Piperacillin 4000 mg and Tazobactam 500 mg (4.5 grams), IV every 6 hours. (N=269) N (%) Blood and lymphatic system disorders Anemia 28 (10.5%) 27 (10.0%) Gastrointestinal disorders Constipation 11 (4.1%) 3 (1.1%) Diarrhea 21 (7.9%) 30 (11.2%) General disorders and administration site conditions Pyrexia 11 (4.1%) 20 (7.4%) Laboratory investigations Alanine aminotransferase increased 26 (9.8%) 19 (7.1%) Aspartate aminotransferase increased 31 (11.7%) 20 (7.4%) Metabolism and nutrition disorders Hypokalemia Hypokalemia includes hypokalemia and blood potassium decreased. 21 (7.9%) 26 (9.7%) Hyponatremia Hyponatremia includes hyponatremia and blood sodium decreased. 17 (6.4%) 3 (1.1%) Skin and subcutaneous tissue disorders Rash Rash includes rash, rash erythematous, and rash generalized. 11 (4.1%) 5 (1.9%) Less Common Adverse Reactions Reported in Trial 1 The following selected adverse reaction was reported in RECARBRIO-treated subjects at a rate of less than 4%: Blood and lymphatic system disorders: thrombocytopenia In Trials 2 and 3, adverse reactions occurred during the protocol specified follow-up period, which was IV therapy plus 14 days following completion of therapy, in 39% (85/216) of patients receiving imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg and 36% (77/214) of patients receiving imipenem 500 mg/cilastatin 500 mg. Table 6 lists the most common adverse reactions occurring in ≥1% of patients receiving imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg or imipenem 500 mg/cilastatin 500 mg in Trials 2 and 3. Table 6: Adverse Reactions Occurring in Greater Than or Equal to 1% of cUTI and cIAI Adult Patients Receiving Imipenem/Cilastatin plus Relebactam 250 mg or Imipenem/Cilastatin in Trials 2 and 3 Adverse Reaction Imipenem/Cilastatin and Relebactam 250 mg Imipenem/Cilastatin (500 mg/500 mg) + Relebactam (250 mg), IV every 6 hours. (N=216) N (%) IMI + Placebo Imipenem/Cilastatin (500 mg/500 mg) + Placebo, IV every 6 hours. (N=214) N (%) Blood and lymphatic system disorders Anemia Anemia includes anemia and hemoglobin decreased. 2 (1%) 4 (2%) Gastrointestinal disorders Diarrhea 12 (6%) 9 (4%) Nausea 12 (6%) 12 (6%) Vomiting 7 (3%) 4 (2%) General disorders and administration site conditions Phlebitis/Infusion site reactions Infusion site reactions include infusion site phlebitis, infusion site erythema, and infusion site pain. 5 (2%) 3 (1%) Pyrexia 5 (2%) 3 (1%) Laboratory Investigations Alanine aminotransferase increased 7 (3%) 4 (2%) Aspartate aminotransferase increased 6 (3%) 3 (1%) Lipase increased 3 (1%) 4 (2%) Blood creatinine increased 1 (<1%) 3 (1%) Nervous system disorders Headache 9 (4%) 5 (2%) Central nervous system adverse reactions Central nervous system adverse reactions include agitation, apathy, confusional states, delirium, disorientation, slow speech, and somnolence. 2 (1%) 5 (2%) Vascular disorders Hypertension Hypertension includes hypertension and blood pressure increased. 4 (2%) 6 (3%) Other Adverse Reactions Associated with Imipenem/Cilastatin Adverse reactions reported with imipenem/cilastatin, a component of RECARBRIO, in clinical studies or during post-marketing experience are listed below. These adverse reactions are not listed above for patients treated with RECARBRIO in Trial 1 or imipenem 500 mg/cilastatin 500 mg plus relebactam 250 mg in Trials 2 and 3. Blood and Lymphatic System Disorders : agranulocytosis, increased eosinophils, hemolytic anemia Nervous System Disorders: seizure Hepatobiliary Disorders : hepatic failure, jaundice Laboratory Investigations : blood lactate dehydrogenase increased, Coombs test positive, eosinophil count increased. Pediatric Patients Clinical Trial Experience in Pediatric Patients with HABP/VABP, cUTI and cIAI RECARBRIO was evaluated in an open-label, randomized, active-controlled, multi-dose, phase 2/3 clinical trial (Trial 4) in pediatric patients from birth to less than 18 years of age with HABP/VABP, cUTI or cIAI [see Clinical Studies (14.3) ]. A total of 85 patients were treated with RECARBRIO and 28 were treated with a comparator agent (investigator's choice from a specified list of comparators). RECARBRIO was administered intravenously as a weight-based dose of 37.5 mg/kg (imipenem 15 mg/kg, cilastatin 15 mg/kg, and relebactam 7.5 mg/kg) every 6 hours or 8 hours, or a fixed-dose of 1.25 grams (imipenem 500 mg, cilastatin 500 mg, and relebactam 250 mg) every 6 hours. In Trial 4, adverse reactions were comparable to those observed in adults. No patient died in either intervention group in the study through Day 28. The most common adverse reactions occurring in greater than 3% of pediatric patients receiving RECARBRIO were vomiting (15%), diarrhea (9%), nausea (7%), headache (6%), phlebitis/infusion site reactions (including phlebitis, infusion site phlebitis, infusion site extravasation, medical device site dermatitis; 5%), and rash (including rash, rash erythematous, rash maculopapular; 4%).

Ganciclovir: Avoid concomitant use. ( 7.1 ) Valproic Acid or Divalproex Sodium: Avoid concomitant use. ( 7.2 ) 7.1 Ganciclovir Generalized seizures have been reported in patients who received ganciclovir concomitantly with imipenem/cilastatin, a component of RECARBRIO. Ganciclovir should not be used concomitantly with RECARBRIO unless the potential benefits outweigh the risks. 7.2 Valproic Acid Based on case reports in the literature concomitant use of carbapenems, including imipenem/cilastatin, components of RECARBRIO, with valproic acid or divalproex sodium may decrease valproic acid concentrations which may increase the risk of breakthrough seizures [see Warnings and Precautions (5.3) ] . 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 . Avoid concomitant use of RECARBRIO with valproic acid or divalproex sodium. Consider alternative antibacterials other than carbapenems to treat infections in patients whose seizures are well controlled on valproic acid or divalproex sodium.

Store RECARBRIO vials at 20°C to 25°C (68°F to 77°F), excursions permitted between 15°C to 30°C (between 59°F to 86°F) [see USP Controlled Room Temperature]. Keep vials in the carton.