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adverse reactions
6 ADVERSE REACTIONS The following serious reactions are described in greater detail in the Warnings and Precautions section: Hypersensitivity reactions [see Warnings and Precautions (5.2) ] Clostridioides difficile -associated diarrhea [see Warnings and Precautions (5.3) ] Adult cIAI, cUTI and HABP/VABP Patients : The most common adverse reactions in adult patients (≥5% in either the cIAI or cUTI indication) are nausea, diarrhea, headache, and pyrexia. ( 6.1 ) The most common adverse reactions (≥5% in the HABP/VABP indication) are increase in hepatic transaminases, renal impairment/renal failure, and diarrhea. ( 6.1 ) Pediatric cIAI, cUTI and HABP/VABP Patients: The most common adverse reactions in pediatric patients (≥7% in cIAI, cUTI, or HABP/VABP) are thrombocytosis, diarrhea, pyrexia, leukopenia, abdominal pain, vomiting, increased aspartate aminotransferase, increased alanine aminotransferase, and anemia. ( 6.1 ) 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 also may not reflect rates observed in practice. Adult Patients Complicated Intra-abdominal Infections and Complicated Urinary Tract Infections, Including Pyelonephritis ZERBAXA was evaluated in Phase 3 comparator-controlled clinical trials of cIAI (Trial 1) and cUTI (Trial 2), which included a total of 1015 patients treated with ZERBAXA (1.5 g every 8 hours, adjusted based on renal function where appropriate) and 1032 patients treated with comparator (levofloxacin 750 mg daily in cUTI or meropenem 1 g every 8 hours in cIAI) for up to 14 days. The mean age of treated patients was 48 to 50 years (range 18 to 92 years), across treatment arms and indications. In both indications, about 25% of the subjects were 65 years of age or older. Most patients (75%) enrolled in the cUTI trial were female, and most patients (58%) enrolled in the cIAI trial were male. Most patients (>70%) in both trials were enrolled in Eastern Europe and were White. The most common adverse reactions (5% or greater in either indication) occurring in patients receiving ZERBAXA were nausea, diarrhea, headache, and pyrexia. Table 7 lists adverse reactions occurring in 1% or greater of patients receiving ZERBAXA in Phase 3 cIAI and cUTI clinical trials. Table 7: Adverse Reactions Occurring in 1% or Greater of Adult Patients Receiving ZERBAXA in Phase 3 cIAI and cUTI Clinical Trials (Trial 1 and Trial 2) Adverse Reaction Complicated Intra-abdominal Infections Complicated Urinary Tract Infections, Including Pyelonephritis ZERBAXA The ZERBAXA for injection dose was 1.5 g intravenously every 8 hours, adjusted to match renal function where appropriate. In the cIAI trials, ZERBAXA was given in conjunction with metronidazole. (N=482) n (%) Meropenem (N=497) n (%) ZERBAXA (N=533) n (%) Levofloxacin (N=535) n (%) Nausea 38 (7.9) 29 (5.8) 15 (2.8) 9 (1.7) Headache 12 (2.5) 9 (1.8) 31 (5.8) 26 (4.9) Diarrhea 30 (6.2) 25 (5) 10 (1.9) 23 (4.3) Pyrexia 27 (5.6) 20 (4) 9 (1.7) 5 (0.9) Constipation 9 (1.9) 6 (1.2) 21 (3.9) 17 (3.2) Insomnia 17 (3.5) 11 (2.2) 7 (1.3) 14 (2.6) Vomiting 16 (3.3) 20 (4) 6 (1.1) 6 (1.1) Hypokalemia 16 (3.3) 10 (2) 4 (0.8) 2 (0.4) ALT increased 7 (1.5) 5 (1) 9 (1.7) 5 (0.9) AST increased 5 (1) 3 (0.6) 9 (1.7) 5 (0.9) Anemia 7 (1.5) 5 (1) 2 (0.4) 5 (0.9) Thrombocytosis 9 (1.9) 5 (1) 2 (0.4) 2 (0.4) Abdominal pain 6 (1.2) 2 (0.4) 4 (0.8) 2 (0.4) Anxiety 9 (1.9) 7 (1.4) 1 (0.2) 4 (0.7) Dizziness 4 (0.8) 5 (1) 6 (1.1) 1 (0.2) Hypotension 8 (1.7) 4 (0.8) 2 (0.4) 1 (0.2) Atrial fibrillation 6 (1.2) 3 (0.6) 1 (0.2) 0 Rash 8 (1.7) 7 (1.4) 5 (0.9) 2 (0.4) Treatment discontinuation due to adverse events occurred in 2.0% (20/1015) of patients receiving ZERBAXA and 1.9% (20/1032) of patients receiving comparator drugs. Renal impairment (including the terms renal impairment, renal failure, and renal failure acute) led to discontinuation of treatment in 5/1015 (0.5%) subjects receiving ZERBAXA and none in the comparator arms. Increased Mortality In the cIAI trials (Phase 2 and 3), death occurred in 2.5% (14/564) of patients receiving ZERBAXA and in 1.5% (8/536) of patients receiving meropenem. The causes of death varied and included worsening and/or complications of infection, surgery, and underlying conditions. Less Common Adverse Reactions in Phase 3 cIAI and cUTI Clinical Trials The following selected adverse reactions were reported in ZERBAXA-treated subjects at a rate of less than 1%: Cardiac disorders: tachycardia, angina pectoris Gastrointestinal disorders: gastritis, abdominal distension, dyspepsia, flatulence, ileus paralytic General disorders and administration site conditions: infusion site reactions Infections and infestations: candidiasis including oropharyngeal and vulvovaginal, fungal urinary tract infection Investigations: increased serum gamma-glutamyl transpeptidase (GGT), increased serum alkaline phosphatase, positive Coombs’ test Metabolism and nutrition disorders: hyperglycemia, hypomagnesemia, hypophosphatemia Nervous system disorders: ischemic stroke Renal and urinary system: renal impairment, renal failure Respiratory, thoracic, and mediastinal disorders: dyspnea Skin and subcutaneous tissue disorders: urticaria Vascular disorders: venous thrombosis Hospital-acquired Bacterial Pneumonia and Ventilator-associated Bacterial Pneumonia ZERBAXA was evaluated in a Phase 3 comparator-controlled clinical trial for HABP/VABP (Trial 3), which included a total of 361 patients treated with ZERBAXA (3 g every 8 hours, adjusted based on renal function where appropriate) and 359 patients treated with comparator (meropenem 1 g every 8 hours) for up to 14 days. The mean age of treated patients was 60 years (range 18 to 98 years), across treatment arms. About 44% of the subjects were 65 years of age or older. Most patients (71%) enrolled in the trial were male. All subjects were mechanically ventilated at randomization and 92% were in an intensive care unit (ICU) at randomization. The median APACHE II score was 17, and 33% of subjects had a baseline APACHE II score of ≥20, indicating a high severity of illness for many patients enrolled in this trial. Table 8 lists adverse reactions occurring in 2% or greater of patients receiving ZERBAXA in a Phase 3 HABP/VABP clinical trial. Table 8: Adverse Reactions Occurring in 2% or Greater of Adult Patients Receiving ZERBAXA in a Phase 3 HABP/VABP Clinical Trial (Trial 3) Adverse Reactions ZERBAXA The ZERBAXA for injection dose was 3 g intravenously every 8 hours, adjusted to match renal function where appropriate. N=361 n (%) Meropenem N=359 n (%) Hepatic transaminase increased Includes alanine aminotransferase (ALT) increased, aspartate aminotransferase (AST) increased, hepatic enzyme increased, hypertransaminasemia, liver function test abnormal. 43 (11.9) 26 (7.2) Renal impairment/renal failure Includes acute renal failure, anuria, azotemia, oliguria, prerenal failure, renal failure, renal impairment. 32 (8.9) 22 (6.1) Diarrhea 23 (6.4) 25 (7.0) Intracranial hemorrhage Includes cerebellar hemorrhage, cerebral hematoma, cerebral hemorrhage, hemorrhage intracranial, hemorrhagic stroke, hemorrhagic transformation stroke, intraventricular hemorrhage, subarachnoid hemorrhage, subdural hematoma. 16 (4.4) 5 (1.4) Vomiting 12 (3.3) 10 (2.8) Clostridioides difficile colitis Includes Clostridioides difficile colitis , Clostridioides difficile infection, Clostridioides test positive . 10 (2.8) 2 (0.6) Treatment discontinuation due to adverse reactions occurred in 1.1% (4/361) of patients receiving ZERBAXA and 1.4% (5/359) of patients receiving meropenem. Less Common Adverse Reactions in a Phase 3 HABP/VABP Clinical Trial The following selected adverse reactions were reported in ZERBAXA-treated subjects at a rate of less than 2%: Investigations: blood alkaline phosphatase increased, gamma-glutamyltransferase increased, Coombs direct test positive Pediatric Patients Complicated Intra-abdominal Infections and Complicated Urinary Tract Infections, Including Pyelonephritis ZERBAXA was evaluated in two blinded, randomized, active-controlled clinical studies in pediatric patients from birth to less than 18 years of age, one in cIAI (Trial 4) and the other in cUTI (Trial 5), which included a total of 170 pediatric patients treated with ZERBAXA and 54 pediatric patients treated with the comparator. The ZERBAXA dosing regimen was the same in each trial [see Dosage and Administration (2.2) ] . Patients were randomized 3:1 to receive ZERBAXA plus metronidazole or meropenem plus placebo in the cIAI study and ZERBAXA or meropenem in the cUTI study [see Clinical Studies (14.1 , 14.2) ] . In these pediatric patients, the type of adverse reactions were generally comparable to those observed in adults. Table 9 lists adverse reactions occurring in 4% or greater of pediatric patients receiving ZERBAXA in either the pediatric cIAI or cUTI clinical trial. Table 9: Adverse Reactions Occurring in 4% or Greater of Pediatric Patients (birth to less than 18 years of age) Receiving ZERBAXA in either the cIAI or cUTI Clinical Trials (Trial 4 and Trial 5) Adverse Reaction Complicated Intra-abdominal Infections Complicated Urinary Tract Infections, Including Pyelonephritis ZERBAXA In the cIAI trials, ZERBAXA was given in conjunction with metronidazole. (N=70) n (%) Meropenem (N=21) n (%) ZERBAXA (N=100) n (%) Meropenem (N=33) n (%) Thrombocytosis Includes platelet count increased. 11 (16) 3 (14) 9 (9) 3 (9) Diarrhea 12 (17) 5 (24) 7 (7) 3 (9) Pyrexia Includes hyperthermia. 9 (13) 3 (14) 7 (7) 1 (3) Leukopenia Includes neutropenia and neutrophil count decreased. 3 (4) 0 (0) 8 (8) 0 (0) Abdominal pain Includes upper abdominal pain. 8 (11) 0 (0) 2 (2) 1 (3) AST increased 5 (7) 1 (5) 4 (4) 2 (6) Vomiting 7 (10) 1 (5) 1 (1) 1 (3) ALT increased 4 (6) 1 (5) 4 (4) 2 (6) Anemia 5 (7) 0 (0) 2 (2) 0 (0) Phlebitis Includes superficial phlebitis. 4 (6) 0 (0) 1 (1) 1 (3) Hypertension 3(4) 0 (0) 0 (0) 1 (3) Gastritis 3 (4) 0 (0) 0 (0) 0 (0) Hypokalemia Includes blood potassium decreased. 3 (4) 0 (0) 0 (0) 0 (0) Bradypnea Includes respiratory rate decreased. , 3 (4) 0 (0) 0 (0) 0 (0) Hospital-acquired Bacterial Pneumonia and Ventilator-associated Bacterial Pneumonia The safety of ZERBAXA was evaluated in an open-label, non-comparative, multicenter clinical study in pediatric patients from 33 weeks post-menstrual age to less than 18 years of age diagnosed with HABP/VABP (NCT04223752; Trial 6). A total of 40 pediatric patients ranging from 10 days of age up to 16 years and 7 months of age were enrolled in the study and received ZERBAXA 60 mg/kg (ceftolozane 40 mg/kg and tazobactam 20 mg/kg) every 8 hours, up to a maximum dose of 3 g, intravenously over 1 hour for a duration of 8 to 14 days [see Dosage and Administration (2.2) ]. The safety profile of ZERBAXA in pediatric patients with HABP/VABP was similar to that in pediatric patients with cIAI and cUTI and adult patients with HABP/VABP. The most common adverse reactions that occurred in greater than 7% of pediatric patients included thrombocytosis, pyrexia, increased AST and ALT, anemia, diarrhea, and leukopenia. Laboratory Values The development of a positive direct Coombs test may occur during treatment with ZERBAXA. The incidence of seroconversion to a positive direct Coombs test was 0.2% in patients receiving ZERBAXA and 0% in patients receiving the comparator in the adult cUTI and cIAI clinical trials. The incidence of seroconversion to a positive direct Coombs test was 31.2% in patients receiving ZERBAXA and 3.6% in patients receiving meropenem in the adult HABP/VABP clinical trial. The incidence of seroconversion to a positive direct Coombs test was 45.3% in patients receiving ZERBAXA and 33.3% in patients receiving meropenem in the pediatric cIAI clinical trial. The incidence of seroconversion to a positive direct Coombs test was 29.7% in patients receiving ZERBAXA and 8.7% in patients receiving meropenem in the pediatric cUTI clinical trial. In clinical trials, there was no evidence of hemolysis in patients who developed a positive direct Coombs test in any treatment group.
adverse reactions table
<table width="90%"><caption>Table 8: Adverse Reactions Occurring in 2% or Greater of Adult Patients Receiving ZERBAXA in a Phase 3 HABP/VABP Clinical Trial (Trial 3)</caption><col width="34%" align="left" valign="top"/><col width="33%" align="center" valign="top"/><col width="33%" align="center" valign="top"/><thead><tr><th styleCode="Lrule Rrule" align="center">Adverse Reactions</th><th styleCode="Rrule">ZERBAXA<footnote ID="t8f1">The ZERBAXA for injection dose was 3 g intravenously every 8 hours, adjusted to match renal function where appropriate. </footnote> N=361 n (%)</th><th styleCode="Rrule">Meropenem N=359 n (%)</th></tr></thead><tbody><tr styleCode="Botrule"><td styleCode="Lrule Rrule">Hepatic transaminase increased<footnote ID="foot6b">Includes alanine aminotransferase (ALT) increased, aspartate aminotransferase (AST) increased, hepatic enzyme increased, hypertransaminasemia, liver function test abnormal.</footnote></td><td styleCode="Rrule">43 (11.9)</td><td styleCode="Rrule">26 (7.2)</td></tr><tr styleCode="Botrule"><td styleCode="Lrule Rrule">Renal impairment/renal failure<footnote ID="foot6c">Includes acute renal failure, anuria, azotemia, oliguria, prerenal failure, renal failure, renal impairment.</footnote></td><td styleCode="Rrule">32 (8.9)</td><td styleCode="Rrule">22 (6.1)</td></tr><tr styleCode="Botrule"><td styleCode="Lrule Rrule">Diarrhea</td><td styleCode="Rrule">23 (6.4)</td><td styleCode="Rrule">25 (7.0)</td></tr><tr styleCode="Botrule"><td styleCode="Lrule Rrule">Intracranial hemorrhage<content styleCode="bold"><footnote ID="foot6d">Includes cerebellar hemorrhage, cerebral hematoma, cerebral hemorrhage, hemorrhage intracranial, hemorrhagic stroke, hemorrhagic transformation stroke, intraventricular hemorrhage, subarachnoid hemorrhage, subdural hematoma.</footnote></content></td><td styleCode="Rrule">16 (4.4)</td><td styleCode="Rrule">5 (1.4)</td></tr><tr styleCode="Botrule"><td styleCode="Lrule Rrule">Vomiting</td><td styleCode="Rrule">12 (3.3)</td><td styleCode="Rrule">10 (2.8)</td></tr><tr><td styleCode="Lrule Rrule"><content styleCode="italics">Clostridioides difficile</content> colitis<content styleCode="bold"><footnote ID="foot6e">Includes <content styleCode="italics">Clostridioides difficile</content> colitis<content styleCode="italics">,</content><content styleCode="italics"> Clostridioides difficile</content> infection, <content styleCode="italics">Clostridioides</content> test positive<content styleCode="italics">.</content></footnote></content></td><td styleCode="Rrule">10 (2.8)</td><td styleCode="Rrule">2 (0.6)</td></tr></tbody></table>