Daptomycin

12.1 Mechanism of Action Daptomycin is an antibacterial drug [see Clinical Pharmacology ( 12.4 )] .

1 INDICATIONS AND USAGE Daptomycin for injection is a lipopeptide antibacterial indicated for the treatment of: • Complicated skin and skin structure infections (cSSSI) in adult and pediatric patients (1 to 17 years of age) ( 1.1 ) and, • Staphylococcus aureus bloodstream infections (bacteremia), in adult patients including those with right-sided infective endocarditis, ( 1.2 ) • Staphylococcus aureus bloodstream infections (bacteremia) in pediatric patients (1 to 17 years of age). ( 1.3 ) Limitations of Use : • Daptomycin for injection is not indicated for the treatment of pneumonia. ( 1.4 ) • Daptomycin for injection is not indicated for the treatment of left-sided infective endocarditis due to S. aureus . ( 1.4 ) • Daptomycin for Injection is not recommended in pediatric patients younger than one year of age due to the risk of potential effects on muscular, neuromuscular, and/or nervous systems (either peripheral and/or central) observed in neonatal dogs. ( 1.4 ) To reduce the development of drug-resistant bacteria and maintain the effectiveness of daptomycin for injection and other antibacterial drugs, daptomycin for injection should be used to treat or prevent infections that are proven or strongly suspected to be caused by bacteria. ( 1.5 ) 1.1 Complicated Skin and Skin Structure Infections (cSSSI) Daptomycin for injection is indicated for the treatment of adult and pediatric patients (1 to 17 years of age) with complicated skin and skin structure infections (cSSSI) caused by susceptible isolates of the following Gram-positive bacteria: Staphylococcus aureus (including methicillin-resistant isolates), Streptococcus pyogenes, Streptococcus agalactiae, Streptococcus dysgalactiae subsp. equisimilis, and Enterococcus faecalis (vancomycin-susceptible isolates only). 1.2 Staphylococcus aureus Bloodstream Infections (Bacteremia) in Adult Patients, Including Those with Right-Sided Infective Endocarditis, Caused by Methicillin-Susceptible and Methicillin-Resistant Isol

2 DOSAGE AND ADMINISTRATION Adult Patients · Administer to adult patients intravenously in 0.9% sodium chloride, either by injection over a 2-minute period or by infusion over a 30-minute period. ( 2.1 , 2.7 ) · Recommended dosage regimen for adult patients ( 2.2 , 2.4 , 2.6 ): Creatinine Clearance (CL CR ) Dosage Regimen cSSSI For 7 to 14 days S.aureus Bacteremia For 2 to 6 weeks ≥30 mL/min 4 mg/kg once every 24 hours 6 mg/kg once every 24 hours <30 mL/min, including hemodialysis and CAPD 4 mg/kg once every 48 hours* 6 mg/kg once every 48 hours* *Administered following hemodialysis on hemodialysis days. Pediatric Patients • Unlike in adults, do NOT administer by injection over a two (2) minute period to pediatric patients . ( 2.1 , 2.7 ) • Administer to pediatric patients intravenously in 0.9% sodium chloride, by infusion over a 30-or 60-minute period, based on age. ( 2.1 , 2.7 ) • Recommended dosage regimen for pediatric patients (1 to 17 years of age) with cSSSI, based on age ( 2.3 ): Age group Dosage* Duration of therapy 12 to 17 years 5 mg/kg once every 24 hours infused over 30 minutes Up to 14 days 7 to 11 years 7 mg/kg once every 24 hours infused over 30 minutes 2 to 6 years 9 mg/kg once every 24 hours infused over 60 minutes 1 to less than 2 years 10 mg/kg once every 24 hours infused over 60 minutes *Recommended dosage is for pediatric patients (1 to 17 years of age) with normal renal function. Dosage adjustment for pediatric patients with renal impairment has not been established. Recommended dosage regimen for pediatric patients (1 to 17 years of age) with S. aureus bacteremia, based on age ( 2.5 ): Age group Dosage* Duration of therapy 12 to 17 years 7 mg/kg once every 24 hours infused over 30 minutes Up to 42 days 7 to 11 years 9 mg/kg once every 24 hours infused over 30 minutes 1 to 6 years 12 mg/kg once every 24 hours infused over 60 minutes *Recommended dosage is for pediatric patients (1 to 17 years of age) with normal renal function. Dosage adjustment for pediatric patients with renal impairment has not been established. • There are other formulations of daptomycin that have differences concerning storage and reconstitution. Carefully follow the reconstitution and storage procedures in labeling. ( 2.7 ) • Do not use in conjunction with ReadyMED® elastomeric infusion pumps in adult and pediatric patients. ( 2.9 ) 2.1 Important Administration Duration Instructions Adults Administer the appropriate volume of the reconstituted daptomycin for injection (concentration of 50 mg per mL) to adult patients intravenously either by injection over a two (2) minute period or by intravenous infusion over a thirty (30) minute period [see Dosage and Administration ( 2.2 , 2.4 , 2.7 )] . Pediatric Patients (1 to 17 Years of Age) Unlike in adults, do NOT administer Daptomycin for Injection by injection over a two (2) minute period to pediatric patients. Pediatric Patients 7 to 17 years of Age : Administer daptomycin for injection intravenously by infusion over a 30-minute period [see Dosage and Administration ( 2.3 , 2.5 , 2.7 )] . Pediatric Patients 1 to 6 years of Age : Administer daptomycin for injection intravenously by infusion over a 60-minute period [see Dosage and Administration ( 2.3 , 2.5 , 2.7 )] . 2.2 Dosage in Adults for cSSSI Administer daptomycin for injection 4 mg/kg to adult patients intravenously in 0.9% sodium chloride injection once every 24 hours for 7 to 14 days. 2.3 Dosage in Pediatric Patients (1 to 17 Years of Age) for cSSSI The recommended dosage regimens based on age for pediatric patients with cSSSI are shown in Table 1. Administer daptomycin for injection intravenously in 0.9% sodium chloride injection once every 24 hours for up to 14 days. Table 1: Recommended Dosage of Daptomycin for Injection in Pediatric Patients (1 to 17 Years of Age) with cSSSI, Based on Age Age Range Dosage Regimen* Duration of therapy 12 to 17 years 5 mg/kg once every 24 hours infused over 30 minutes Up to 14 days 7 to 11 years 7 mg/kg once every 24 hours infused over 30 minutes 2 to 6 years 9 mg/kg once every 24 hours infused over 60 minutes 1 to less than 2 years 10 mg/kg once every 24 hours infused over 60 minutes *Recommended dosage regimen is for pediatric patients (1 to 17 years of age) with normal renal function. Dosage adjustment for pediatric patients with renal impairment has not been established. 2.4 Dosage in Adult Patients with Staphylococcus aureus Bloodstream Infections (Bacteremia), Including Those with Right-Sided Infective Endocarditis, Caused by Methicillin- Susceptible and Methicillin-Resistant Isolates Administer daptomycin for injection 6 mg/kg to adult patients intravenously in 0.9% sodium chloride injection once every 24 hours for 2 to 6 weeks. There are limited safety data for the use of daptomycin for injection for more than 28 days of therapy. In the Phase 3 trial, there were a total of 14 adult patients who were treated with daptomycin for more than 28 days. 2.5 Dosage in Pediat

6 ADVERSE REACTIONS The following adverse reactions are described, or described in greater detail, in other sections: Anaphylaxis/Hypersensitivity Reactions [see Warnings and Precautions ( 5.1 )] Myopathy and Rhabdomyolysis [see Warnings and Precautions ( 5.2 )] Eosinophilic Pneumonia [see Warnings and Precautions ( 5.3 )] Drug Reaction with Eosinophilia and Systemic Symptoms [see Warnings and Precautions ( 5.4 )] Tubulointerstitial Nephritis [see Warnings and Precautions ( 5.5 )] Peripheral Neuropathy [see Warnings and Precautions ( 5.6 )] Increased International Normalized Ratio (INR)/Prolonged Prothrombin Time [see Warnings and Precautions ( 5.11 ) and Drug Interactions ( 7.2 )] • Adult cSSSI Patients : The most common adverse reactions that occurred in ≥2% of adult cSSSI patients receiving daptomycin 4 mg/kg were diarrhea, headache, dizziness, rash, abnormal liver function tests, elevated creatine phosphokinase (CPK), urinary tract infections, hypotension, and dyspnea. ( 6.1 ) • Pediatric cSSSI Patients : The most common adverse reactions that occurred in ≥2% of pediatric patients receiving daptomycin were diarrhea, vomiting, abdominal pain, pruritus, pyrexia, elevated CPK, and headache. ( 6.1 ) • Adult S. aureus bacteremia/endocarditis Patients : The most common adverse reactions that occurred in ≥5% of S. aureus bacteremia/endocarditis patients receiving daptomycin 6 mg/kg were sepsis, bacteremia, abdominal pain, chest pain, edema, pharyngolaryngeal pain, pruritus, increased sweating, insomnia, elevated CPK, and hypertension. ( 6.1 ) • Pediatric S. aureus bacteremia Patients : The most common adverse reactions that occurred in ≥5% of pediatric patients receiving daptomycin were vomiting and elevated CPK. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact NorthStar Rx LLC at 1-800-206-7821 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 with rates in the clinical trials of another drug and may not reflect the rates observed in practice. Clinical Trial Experience in Adult Patients Clinical trials enrolled 1,864 adult patients treated with daptomycin and 1,416 treated with comparator. Complicated Skin and Skin Structure Infection Trials in Adults In Phase 3 complicated skin and skin structure infection (cSSSI) trials in adult patients, daptomycin was discontinued in 15/534 (2.8%) patients due to an adverse reaction, while comparator was discontinued in 17/558 (3.0%) patients. The rates of the most common adverse reactions, organized by body system, observed in adult patients with cSSSI (receiving 4 mg/kg daptomycin) are displayed in Table 6. Table 6: Incidence of Adverse Reactions that Occurred in ≥2% of Adult Patients in the Daptomycin Treatment Group and ≥ the Comparator Treatment Group in Phase 3 cSSSI Trials Adverse Reaction Adult Patients (%) Daptomycin 4 mg/kg (N=534) Comparator* (N=558) Gastrointestinal disorders Diarrhea 5.2 4.3 Nervous system disorders Headache 5.4 5.4 Dizziness 2.2 2.0 Skin/subcutaneous disorders Rash 4.3 3.8 Diagnostic investigations Abnormal liver function tests 3.0 1.6 Elevated CPK 2.8 1.8 Infections Urinary tract infections 2.4 0.5 Vascular disorders Hypotension 2.4 1.4 Respiratory disorders Dyspnea 2.1 1.6 * Comparator: vancomycin (1 g IV q12h) or an anti-staphylococcal semi-synthetic penicillin (i.e., nafcillin, oxacillin, cloxacillin, or flucloxacillin; 4 to 12 g/day IV in divided doses). Drug-related adverse reactions (possibly or probably drug-related) that occurred in <1% of adult patients receiving daptomycin in the cSSSI trials are as follows: Body as a Whole: fatigue, weakness, rigors, flushing, hypersensitivity Blood/Lymphatic System: leukocytosis, thrombocytopenia, thrombocytosis, eosinophilia, increased International Normalized Ratio (INR) Cardiovascular System: supraventricular arrhythmia Dermatologic System: eczema Digestive System: abdominal distension, stomatitis, jaundice, increased serum lactate dehydrogenase Metabolic/Nutritional System: hypomagnesemia, increased serum bicarbonate, electrolyte disturbance Musculoskeletal System: myalgia, muscle cramps, muscle weakness, arthralgia Nervous System: vertigo, mental status change, paresthesia Special Senses: taste disturbance, eye irritation S. aureus Bacteremia/Endocarditis Trial in Adults In the S. aureus bacteremia/endocarditis trial involving adult patients, daptomycin was discontinued in 20/120 (16.7%) patients due to an adverse reaction, while comparator was discontinued in 21/116 (18.1%) patients. Serious Gram-negative infections (including bloodstream infections) were reported in 10/120 (8.3%) daptomycin-treated patients and 0/115 comparator-treated patients. Comparator-treated patients received dual therapy that included initial gentamicin for 4 days. Infections were reported during treatment and during

7 DRUG INTERACTIONS 7.1 HMG-CoA Reductase Inhibitors In healthy adult subjects, concomitant administration of daptomycin and simvastatin had no effect on plasma trough concentrations of simvastatin, and there were no reports of skeletal myopathy [see Clinical Pharmacology ( 12.3 )] . However, inhibitors of HMG-CoA reductase may cause myopathy, which is manifested as muscle pain or weakness associated with elevated levels of creatine phosphokinase (CPK). In the adult Phase 3 S. aureus bacteremia/endocarditis trial, some patients who received prior or concomitant treatment with an HMG-CoA reductase inhibitor developed elevated CPK [see Adverse Reactions ( 6.1 )] . Experience with the coadministration of HMG-CoA reductase inhibitors and daptomycin in patients is limited; therefore, consideration should be given to suspending use of HMG-CoA reductase inhibitors temporarily in patients receiving daptomycin. 7.2 Drug-Laboratory Test Interactions Clinically relevant plasma concentrations of daptomycin have been observed to cause a significant concentration-dependent false prolongation of prothrombin time (PT) and elevation of International Normalized Ratio (INR) when certain recombinant thromboplastin reagents are utilized for the assay. The possibility of an erroneously elevated PT/INR result due to interaction with a recombinant thromboplastin reagent may be minimized by drawing specimens for PT or INR testing near the time of trough plasma concentrations of daptomycin. However, sufficient daptomycin concentrations may be present at trough to cause interaction. If confronted with an abnormally high PT/INR result in a patient being treated with daptomycin, it is recommended that clinicians: Repeat the assessment of PT/INR, requesting that the specimen be drawn just prior to the next daptomycin dose (i.e., at trough concentration). If the PT/INR value obtained at trough remains substantially elevated above what would otherwise be expected, consider evaluating PT/INR utilizing an alternative method. Evaluate for other causes of abnormally elevated PT/INR results.