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warnings and cautions
5. WARNINGS AND PRECAUTIONS Serious hypersensitivity (anaphylactic) reactions have been reported with beta-lactam antibacterial drugs, including Teflaro. If a hypersensitivity reaction occurs, discontinue Teflaro. ( 5.1 ) Clostridioides difficile -associated diarrhea (CDAD) has been reported with nearly all systemic antibacterial agents, including Teflaro. Evaluate if diarrhea occurs. ( 5.2 ) Neurological adverse reactions have been reported in patients treated with cephalosporins, including Teflaro. If neurological adverse reactions occur, consider discontinuing Teflaro or making appropriate dosage adjustments in patients with renal impairment. ( 2.3 , 5.3 ) Direct Coombs’ test seroconversion has been reported with Teflaro. If anemia develops during or after therapy, a diagnostic workup for drug-induced hemolytic anemia should be performed and consideration given to discontinuation of Teflaro. ( 5.4 ) 5.1 Hypersensitivity Reactions Serious and occasionally fatal hypersensitivity (anaphylactic) reactions and serious skin reactions have been reported in patients receiving beta-lactam antibacterial drugs. Before therapy with Teflaro is instituted, careful inquiry about previous hypersensitivity reactions to other cephalosporins, penicillins, or carbapenems should be made. Maintain clinical supervision if this product is to be given to a penicillin- or other beta-lactam-allergic patient, because cross sensitivity among beta-lactam antibacterial agents has been clearly established. If an allergic reaction to Teflaro occurs, discontinue Teflaro and institute appropriate treatment and supportive measures. 5.2 Clostridioides difficile - Associated Diarrhea Clostridioides difficile -associated diarrhea (CDAD) has been reported for nearly all systemic antibacterial agents, including Teflaro, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon and may permit overgrowth of C. difficile . C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin-producing strains 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 antibiotic use. Careful medical history is necessary because CDAD has been reported to occur more than 2 months after the administration of antibacterial agents. If CDAD is suspected or confirmed, antibacterials not directed against C. difficile should be discontinued, if possible. Appropriate fluid and electrolyte management, protein supplementation, antibiotic treatment of C. difficile , and surgical evaluation should be instituted as clinically indicated [see Adverse Reactions ( 6.1 )]. 5.3 Neurological Adverse Reactions Neurological adverse reactions have been reported during postmarketing surveillance in patients treated with cephalosporins, including Teflaro. These reactions include encephalopathy and seizures [see Adverse Reactions ( 6.2 )] . Most cases occurred in patients with renal impairment who did not receive appropriate dosage adjustment. The neurological adverse reactions were reversible and resolved after discontinuation of Teflaro or after hemodialysis. If neurological adverse reactions associated with Teflaro therapy occur, consider discontinuing Teflaro or making appropriate dosage adjustments in patients with renal impairment [see Dosage and Administration ( 2.3 )] . 5.4 Direct Coombs ’ Test Seroconversion Seroconversion from a negative to a positive direct Coombs’ test result occurred in 120/1114 (10.8%) of adult patients receiving Teflaro and 49/1116 (4.4%) of patients receiving comparator drugs in the four pooled adult Phase 3 trials. In the pooled adult Phase 3 CABP trials, 51/520 (9.8%) of Teflaro-treated patients compared to 24/534 (4.5%) of ceftriaxone-treated patients seroconverted from a negative to a positive direct Coombs’ test result. No adverse reactions representing hemolytic anemia were reported in any treatment group. Seroconversion from a negative to a positive direct Coombs’ test result occurred in 42/234 (17.9%) of children receiving Teflaro and 3/93 (3.2%) of patients receiving comparator drugs in the three pooled pediatric trials. No adverse reactions representing hemolytic anemia were reported in any treatment group. If anemia develops during or after treatment with Teflaro, drug-induced hemolytic anemia should be considered. Diagnostic studies including a direct Coombs’ test, should be performed. If drug-induced hemolytic anemia is suspected, discontinuation of Teflaro should be considered and supportive care should be administered to the patient (i.e. transfusion) if clinically indicated. 5. 5 Development of Drug-Resistant Bacteria Prescribing Teflaro in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.
6. ADVERSE REACTIONS The following serious adverse reactions are described in greater detail in the Warnings and Precautions section Hypersensitivity Reactions [see Warnings and Precautions ( 5.1 )] Clostridioides difficile -Associated diarrhea [see Warnings and Precautions ( 5.2 )] Neurological Adverse Reactions [see Warnings and Precautions ( 5.3 )] Direct Coombs’ Test Seroconversion [see Warnings and Precautions ( 5.4 )] The most common adverse reactions occurring in >2% of adult patients and ≥3% of pediatric patients are diarrhea, nausea, and rash. Additional adverse reactions that occurred in ≥3% of pediatric patients include vomiting and pyrexia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact AbbVie Inc. at 1-800-678-1605 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 clinical trials of a drug cannot be compared directly to rates from clinical trials of another drug and may not reflect rates observed in practice. Adult Patients Teflaro was evaluated in four controlled comparative Phase 3 clinical trials (two in ABSSSI and two in CABP) which included 1300 adult patients treated with Teflaro (600 mg administered by IV over 1 hour every 12h) and 1297 patients treated with comparator (vancomycin plus aztreonam or ceftriaxone) for a treatment period up to 21 days. The median age of patients treated with Teflaro was 54 years, ranging between 18 and 99 years old. Patients treated with Teflaro were predominantly male (63%) and Caucasian (82%). Serious Adverse Reactions and Adverse Reactions Leading to Discontinuation In the four pooled adult Phase 3 clinical trials, serious adverse reactions (SARs) occurred in 98/1300 (7.5%) of patients receiving Teflaro and 100/1297 (7.7%) of patients receiving comparator drugs. Treatment discontinuation due to adverse reactions occurred in 35/1300 (2.7%) of patients receiving Teflaro and 48/1297 (3.7%) of patients receiving comparator drugs with the most common adverse reactions leading to discontinuation being hypersensitivity for both treatment groups at a rate of 0.3% in the Teflaro group and 0.5% in comparator group. Most Common Adverse Reactions No adverse reactions occurred in greater than 5% of adult patients receiving Teflaro. The most common adverse reactions occurring in > 2% of patients receiving Teflaro in the pooled adult phase 3 clinical trials were diarrhea, nausea, and rash. Table 6 lists adverse reactions occurring in ≥ 2% of patients receiving Teflaro in the pooled adult Phase 3 clinical trials. Table 6: Adverse Reactions Occurring in ≥ 2% of Patients Receiving Teflaro in the Pooled Adult Phase 3 Clinical Trials Adverse Reactions Pooled Phase 3 Clinical Trials (four trials, two in ABSSSI and two in CABP) Teflaro (N=1300) Pooled Comparators a (N=1297) Gastrointestinal D isorders Diarrhea 5 % 3 % Nausea 4 % 4 % Constipation 2 % 2 % Vomiting 2 % 2 % Laboratory Investigations Increased transaminases 2% 3 % Metabolism and N utrition disorders Hypokalemia 2 % 3 % Skin and S ubcutaneous T issue D isorders Rash 3% 2% Vascular D isorders Phlebitis 2% 1% a Comparators included vancomycin 1 gram IV every 12h plus aztreonam 1 gram IV every 12h in the Phase 3 ABSSSI trials, and ceftriaxone 1 gram IV every 24h in the Phase 3 CABP trials. Other Adverse Reactions Observed During Clinical Trials of Teflaro Following is a list of additional adverse reactions reported by the 1740 adult patients who received Teflaro in any clinical trial with incidences less than 2%. Blood and lymphatic system disorders - Anemia, Eosinophilia, Neutropenia, Thrombocytopenia Cardiac disorders - Bradycardia, Palpitations Gastrointestinal disorders - Abdominal pain General disorders and administration site conditions - Pyrexia Hepatobiliary disorders - Hepatitis Immune system disorders - Hypersensitivity, Anaphylaxis Infections and infestations - Clostridioides difficile colitis Metabolism and nutrition disorders - Hyperglycemia, Hyperkalemia Nervous system disorders - Dizziness, Convulsion Renal and urinary disorders - Renal failure Skin and subcutaneous tissue disorders - Urticaria Pediatric Patients Teflaro was evaluated in three clinical trials (one in ABSSSI and two in CABP) which included 257 pediatric patients 2 months to < 18 years of age treated with Teflaro, and 102 patients treated with comparator agents for a treatment period up to 21 days. In two trials, one in ABSSSI and one in CABP, the dose was selected to result in exposures comparable to adult exposure with 600 mg administered by IV infusion every 12h. In an additional pediatric trial in complicated CABP the dose was higher. The median age of pediatric patients treated with Teflaro was 5 years, ranging from 2 months to < 18 years of age. Patients treated with Teflaro were predominantly male (55%) and Caucasian (92%). A single study enrolled 11 pediatric patients with a gestational age of ≥34 weeks and a postnatal age of 12 days to less than 2 months of age. The safety findings were similar to those observed in adult and pediatric patients 2 months of age and older. Serious Adverse Reactions and Adverse Reactions Leading to Discontinuation In the three pooled pediatric clinical trials, SARs occurred in 10/257 (4%) of patients receiving Teflaro and 3/102 (3%) of patients receiving comparator drugs. Treatment discontinuation due to adverse reactions occurred in 10/257 (3.9%) of patients receiving Teflaro and 2/102 (2%) of patients receiving comparator drugs with the most common adverse reaction leading to discontinuation being rash in 2/257 (0.8%) of patients treated with Teflaro. Most Common Adverse Reactions No adverse reactions occurred in greater than 8% of pediatric patients receiving Teflaro. The most common adverse reactions occurring in ≥ 3% of patients receiving Teflaro in the pooled pediatric clinical trials were diarrhea, nausea, vomiting, pyrexia and rash. Table 7 lists adverse reactions occurring in ≥ 3% of patients receiving Teflaro in the pooled pediatric clinical trials. Table 7: Adverse Reactions Occurring in ≥ 3% of Patients Receiving Teflaro in the Pooled Pediatric Clinical Trials Adverse Reactions Pooled Pediatric Clinical Trials (three trials, one in ABSSSI and two in CABP) Teflaro (N= 257 ) Pooled Comparators a (N=102 ) Gastrointestinal D isorders Diarrhea 8 % 10 % Nausea 3 % 1 % Vomiting 5 % 12 % General and Administrative Site disorders Pyrexia 3% 2 % Skin and S ubcutaneous T issue D isorders Rash 7% 4% a Comparators included vancomycin or cefazolin with or without aztreonam in the ABSSSI trial and ceftriaxone alone or ceftriaxone plus vancomycin in the CABP trials Following is a list of additional adverse reactions reported by the 257 patients who received Teflaro in the pediatric clinical trials with incidences less than 3%. Investigations – Alanine aminotransferase increased, Aspartate aminotransferase increased Nervous system disorders – Headache Skin and subcutaneous tissue disorders - Pruritus 6.2 Postmarketing Experience The following adverse reactions have been identified during post approval use of Teflaro in adult patients. Because these adverse reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Blood and lymphatic system disorders : Agranulocytosis, leukopenia, eosinophilic pneumonia. Nervous system disorders: Encephalopathy, seizures [ s ee Warnings and Precautions ( 5.3 )]