Complete SPL Sections#
DESCRIPTION
DESCRIPTION SECTION
Sevoflurane USP, volatile liquid for inhalation, a nonflammable and nonexplosive liquid administered by vaporization, is a halogenated general inhalation anesthetic drug. Sevoflurane is fluoromethyl 2,2,2,-trifluoro-1-(trifluoromethyl) ethyl ether and its structural formula is: Sevoflurane, Physical Constants are: Molecular Weight 200.05 Boiling point at 760 mm Hg 58.6°C Specific gravity at 20°C 1.520-1.525 Vapor pressure in mm Hg 157 mm Hg at 20°C 197 mm Hg at 25°C 317 mm Hg at 36°C Distribution Partition Coefficients at 37°C: Blood/Gas 0.63 -0.69 Water/Gas 0.36 Olive Oil/Gas 47-54 Brain/Gas 1.15 Mean Component/Gas Partition Coefficients at 25°C for Polymers Used Commonly in Medical Applications: Conductive rubber 14.0 Butyl rubber 7.7 Polyvinylchloride 17.4 Polyethylene 1.3 Sevoflurane is nonflammable and nonexplosive as defined by the requirements of International Electrotechnical Commission 601-2-13. Sevoflurane is a clear, colorless, liquid containing no additives. Sevoflurane is not corrosive to stainless steel, brass, aluminum, nickel-plated brass, chrome-plated brass or copper beryllium. Sevoflurane is nonpungent. It is miscible with ethanol, ether, chloroform, and benzene, and it is slightly soluble in water. Sevoflurane is stable when stored under normal room lighting conditions according to instructions. No discernible degradation of sevoflurane occurs in the presence of strong acids or heat. When in contact with alkaline CO 2 absorbents (e.g., Baralyme ® and to a lesser extent soda lime) within the anesthesia machine, sevoflurane can undergo degradation under certain conditions. Degradation of sevoflurane is minimal, and degradants are either undetectable or present in non-toxic amounts when used as directed with fresh absorbents. Sevoflurane degradation and subsequent degradant formation are enhanced by increasing absorbent temperature increased sevoflurane concentration, decreased fresh gas flow and desiccated CO 2 absorbents (especially with potassium hydroxide containing absorbents e.g. Baralyme). Sevoflurane alkaline degradation occurs by two pathways. The first results from the loss of hydrogen fluoride with the formation of pentafluoroisopropenyl fluoromethyl ether, (PIFE, C 4 H 2 F 6 O), also known as Compound A, and trace amounts of pentafluoromethoxy isopropyl fluoromethyl ether, (PMFE, C 5 H 6 F 6 O), also known as Compound B. The second pathway for degradation of sevoflurane, which occurs primarily in the presence of desiccated CO 2 absorbents, is discussed later. In the first pathway, the defluorination pathway, the production of degradants in the anesthesia circuit results from the extraction of the acidic proton in the presence of a strong base (KOH and/or NaOH) forming an alkene (Compound A) from sevoflurane similar to formation of 2-bromo-2-chloro-1,1-difluoro ethylene (BCDFE) from halothane. Laboratory simulations have shown that the concentration of these degradants is inversely correlated with the fresh gas flow rate (See Figure 1). Figure 1. Fresh Gas Flow Rate versus Compound A Levels in a Circle Absorber System Since the reaction of carbon dioxide with absorbents is exothermic, the temperature increase will be determined by quantities of CO 2 absorbed, which in turn will depend on fresh gas flow in the anesthesia circle system, metabolic status of the patient, and ventilation. The relationship of temperature produced by varying levels of CO 2 and Compound A production is illustrated in the following in vitro simulation where CO 2 was added to a circle absorber system. Figure 2. Carbon Dioxide Flow versus Compound A and Maximum Temperature Compound A concentration in a circle absorber system increases as a function of increasing CO 2 absorbent temperature and composition (Baralyme producing higher levels than soda lime), increased body temperature, and increased minute ventilation, and decreasing fresh gas flow rates. It has been reported that the concentration of Compound A increases significantly with prolonged dehydration of Baralyme. Compound A exposure in patients also has been shown to rise with increased sevoflurane concentrations and duration of anesthesia. In a clinical study in which sevoflurane was administered to patients under low flow conditions for ≥ 2 hours at flow rates of 1 Liter/minute, Compound A levels were measured in an effort to determine the relationship between MAC hours and Compound A levels produced. The relationship between Compound A levels and sevoflurane exposure are shown in Figure 2a. Figure 2a. ppm·hr versus MAC·hr at Flow Rate of 1 L/min Compound A has been shown to be nephrotoxic in rats after exposures that have varied in duration from one to three hours. No histopathologic change was seen at a concentration of up to 270 ppm for one hour. Sporadic single cell necrosis of proximal tubule cells has been reported at a concentration of 114 ppm after a 3-hour exposure to Compound A in rats. The LC 50 reported at 1 hour is 1050-1090 ppm (male-female) and, at 3 hours, 350-490 ppm (male-female). An experiment was performed comparing sevoflurane plus 75 or 100 ppm Compound A with an active control to evaluate the potential nephrotoxicity of Compound A in non-human primates. A single 8-hour exposure of Sevoflurane in the presence of Compound A produced single-cell renal tubular degeneration and single-cell necrosis in cynomolgus monkeys. These changes are consistent with the increased urinary protein, glucose level and enzymic activity noted on days one and three on the clinical pathology evaluation. This nephrotoxicity produced by Compound A is dose and duration of exposure dependent. At a fresh gas flow rate of 1 L/min, mean maximum concentrations of Compound A in the anesthesia circuit in clinical settings are approximately 20 ppm (0.002%) with soda lime and 30 ppm (0.003%) with Baralyme in adult patients; mean maximum concentrations in pediatric patients with soda lime are about half those found in adults. The highest concentration observed in a single patient with Baralyme was 61 ppm (0.0061%) and 32 ppm (0.0032%) with soda lime. The levels of Compound A at which toxicity occurs in humans is not known. The second pathway for degradation of sevoflurane occurs primarily in the presence of desiccated CO 2 absorbents and leads to the dissociation of sevoflurane into hexafluoroisopropanol (HFIP) and formaldehyde. HFIP is inactive, non-genotoxic, rapidly glucuronidated and cleared by the liver. Formaldehyde is present during normal metabolic processes. Upon exposure to a highly desiccated absorbent, formaldehyde can further degrade into methanol and formate. Formate can contribute to the formation of carbon monoxide in the presence of high temperature that can be associated with desiccated Baralyme ® . Methanol can react with Compound A to form the methoxy addition product Compound B. Compound B can undergo further HF elimination to form Compounds C, D, and E. Sevoflurane degradants were observed in the respiratory circuit of an experimental anesthesia machine using desiccated CO 2 absorbents and maximum sevoflurane concentrations (8%) for extended periods of time (> 2 hours). Concentrations of formaldehyde observed with desiccated soda lime in this experimental anesthesia respiratory circuit were consistent with levels that could potentially result in respiratory irritation. Although KOH containing CO 2 absorbents are no longer commercially available, in the laboratory experiments, exposure of sevoflurane to the desiccated KOH containing CO 2 absorbent, Baralyme, resulted in the detection of substantially greater degradant levels.
CLINICAL PHARMACOLOGY
CLINICAL PHARMACOLOGY SECTION
Sevoflurane is an inhalational anesthetic agent for use in induction and maintenance of general anesthesia. Minimum alveolar concentration (MAC) of sevoflurane in oxygen for a 40-year-old adult is 2.1%. The MAC of sevoflurane decreases with age (see DOSAGE AND ADMINISTRATION for details).
CLINICAL STUDIES
CLINICAL STUDIES SECTION
Sevoflurane was administered to a total of 3185 patients. The types of patients are summarized as follows: Table 5. Patients Receiving Sevoflurane in Clinical Studies Type of Patients Number Studied ADULT 2223 Cesarean Delivery 29 Cardiovascular and patients at risk of myocardial ischemia 246 Neurosurgical 22 Hepatic impairment 8 Renal impairment 35 PEDIATRIC 962 Clinical experience with these patients is described below. Adult Anesthesia The efficacy of sevoflurane in comparison to isoflurane, enflurane, and propofol was investigated in 3 outpatient and 25 inpatient studies involving 3591 adult patients. Sevoflurane was found to be comparable to isoflurane, enflurane, and propofol for the maintenance of anesthesia in adult patients. Patients administered sevoflurane showed shorter times (statistically significant) to some recovery events (extubation, response to command, and orientation) than patients who received isoflurane or propofol. Mask Induction Sevoflurane has a nonpungent odor and does not cause respiratory irritability. Sevoflurane is suitable for mask induction in adults. In 196 patients, mask induction was smooth and rapid, with complications occurring with the following frequencies: cough, 6%; breathholding, 6%; agitation, 6%; laryngospasm, 5%. Ambulatory Surgery Sevoflurane was compared to isoflurane and propofol for maintenance of anesthesia supplemented with N 2 O in two studies involving 786 adult (18-84 years of age) ASA Class I, II, or III patients. Shorter times to emergence and response to commands (statistically significant) were observed with sevoflurane compared to isoflurane and propofol. Table 6. Recovery Parameters in Two Outpatient Surgery Studies: Least Squares Mean ± SEM Sevoflurane/N 2 O Isoflurane/N 2 O Sevoflurane/N 2 O Propofol/N 2 O Mean Maintenance 0.64 ± 0.03 0.66 ± 0.03 0.8 ± 0.5 7.3 ± 2.3 Anesthesia MAC·hr. MAC·hr. MAC·hr. mg/kg/hr. Exposure ± SD (n = 245) (n = 249) (n = 166) (n = 166) Time to Emergence (min) 8.2 ± 0.4 (n = 246) 9.3 ± 0.3 (n = 251) 8.3 ± 0.7 (n = 137) 10.4 ± 0.7 (n = 142) Time to Respond to Commands (min) 8.5 ± 0.4 (n = 246) 9.8 ± 0.4 (n = 248) 9.1 ± 0.7 (n = 139) 11.5 ± 0.7 (n = 143) Time to First Analgesia (min) 45.9 ± 4.7 (n = 160) 59.1 ± 6.0 (n = 252) 46.1 ± 5.4 (n = 83) 60.0 ± 4.7 (n = 88) Time to Eligibility for Discharge from Recovery Area (min) 87.6 ± 5.3 (n = 244) 79.1 ± 5.2 (n = 252) 103.1 ± 3.8 (n = 139) 105.1 ± 3.7 (n = 143) n = number of patients with recording of recovery events. Inpatient Surgery Sevoflurane was compared to isoflurane and propofol for maintenance of anesthesia supplemented with N 2 O in two multicenter studies involving 741 adult ASA Class I, II or III (18-92 years of age) patients. Shorter times to emergence, command response, and first post-anesthesia analgesia (statistically significant) were observed with sevoflurane compared to isoflurane and propofol. Table 7. Recovery Parameters in Two Inpatient Surgery Studies: Least Squares Mean ± SEM Sevoflurane/N 2 O Isoflurane/N 2 O Sevoflurane/N 2 O Propofol/N 2 O Mean Maintenance 0.64 ± 0.03 0.66 ± 0.03 0.8 ± 0.5 7.3 ± 2.3 Anesthesia MAC·hr. MAC·hr. MAC·hr. mg/kg/hr. Exposure ± SD (n = 245) (n = 249) (n = 166) (n = 166) Time to Emergence (min) 8.2 ± 0.4 (n = 246) 9.3 ± 0.3 (n = 251) 8.3 ± 0.7 (n = 137) 10.4 ± 0.7 (n = 142) Time to Respond to Commands (min) 8.5 ± 0.4 (n = 246) 9.8 ± 0.4 (n = 248) 9.1 ± 0.7 (n = 139) 11.5 ± 0.7 (n = 143) Time to First Analgesia (min) 45.9 ± 4.7 (n = 160) 59.1 ± 6.0 (n = 252) 46.1 ± 5.4 (n = 83) 60.0 ± 4.7 (n = 88) Time to Eligibility for Discharge from Recovery Area (min) 87.6 ± 5.3 (n = 244) 79.1 ± 5.2 (n = 252) 103.1 ± 3.8 (n = 139) 105.1 ± 3.7 (n = 143) n = number of patients with recording of recovery events. Pediatric Anesthesia The concentration of sevoflurane required for maintenance of general anesthesia is age-dependent (see DOSAGE AND ADMINISTRATION ). Sevoflurane or halothane was used to anesthetize 1620 pediatric patients aged 1 day to 18 years, and ASA physical status I or II (948 sevoflurane, 672 halothane). In one study involving 90 infants and children, there were no clinically significant decreases in heart rate compared to awake values at 1 MAC. Systolic blood pressure decreased 15%-20% in comparison to awake values following administration of 1 MAC sevoflurane; however, clinically significant hypotension requiring immediate intervention did not occur. Overall incidences of bradycardia [more than 20 beats/min lower than normal (80 beats/min)] in comparative studies was 3% for sevoflurane and 7% for halothane. Patients who received sevoflurane had slightly faster emergence times (12 vs. 19 minutes), and a higher incidence of post-anesthesia agitation (14% vs. 10%). Sevoflurane (n = 91) was compared to halothane (n = 89) in a single-center study for elective repair or palliation of congenital heart disease. The patients ranged in age from 9 days to 11.8 years with an ASA physical status of II, III, and IV (18%, 68%, and 13% respectively). No significant differences were demonstrated between treatment groups with respect to the primary outcome measures: cardiovascular decompensation and severe arterial desaturation. Adverse event data was limited to the study outcome variables collected during surgery and before institution of cardiopulmonary bypass. Mask Induction Sevoflurane has a nonpungent odor and is suitable for mask induction in pediatric patients. In controlled pediatric studies in which mask induction was performed, the incidence of induction events is shown below (see ADVERSE REACTIONS ). Table 8. Incidence of Pediatric Induction Events Sevoflurane (n = 836) Halothane (n = 660) Agitation 14% 11% Cough 6% 10% Breathholding 5% 6% Secretions 3% 3% Laryngospasm 2% 2% Bronchospasm 1.5 mg/dL. Fourteen patients who received sevoflurane were compared with 12 patients who received isoflurane. In another study, 21 patients who received sevoflurane were compared with 20 patients who received enflurane. Creatinine levels increased in 7% of patients who received sevoflurane, 8% of patients who received isoflurane, and 10% of patients who received enflurane. Because of the small number of patients with renal insufficiency (baseline serum creatinine greater than 1.5 mg/dL) studied, the safety of sevoflurane administration in this group has not yet been fully established. Therefore, sevoflurane should be used with caution in patients with renal insufficiency (see WARNINGS ).
INDICATIONS AND USAGE
INDICATIONS & USAGE SECTION
Sevoflurane is indicated for induction and maintenance of general anesthesia in adult and pediatric patients for inpatient and outpatient surgery. Sevoflurane should be administered only by persons trained in the administration of general anesthesia. Facilities for maintenance of a patent airway, artificial ventilation, oxygen enrichment, and circulatory resuscitation must be immediately available. Since level of anesthesia may be altered rapidly, only vaporizers producing predictable concentrations of sevoflurane should be used.
CONTRAINDICATIONS
CONTRAINDICATIONS SECTION
Known or suspected genetic susceptibility to malignant hyperthermia (see WARNINGS - Malignant Hyperthermia , CLINICAL PHARMACOLOGY - Pharmacogenomics ). Known or suspected sensitivity to sevoflurane or to other halogenated inhalational anesthetics.
WARNINGS
WARNINGS SECTION
Risk of Renal Injury Although data from controlled clinical studies at low flow rates are limited, findings taken from patient and animal studies suggest that there is a potential for renal injury which is presumed due to Compound A. Animal and human studies demonstrate that sevoflurane administered for more than 2 MAC·hours and at fresh gas flow rates of < 2 L/min may be associated with proteinuria and glycosuria. While a level of Compound A exposure at which clinical nephrotoxicity might be expected to occur has not been established, it is prudent to consider all of the factors leading to Compound A exposure in humans, especially duration of exposure, fresh gas flow rate, and concentration of sevoflurane. During sevoflurane anesthesia the clinician should adjust inspired concentration and fresh gas flow rate to minimize exposure to Compound A. To minimize exposure to Compound A, sevoflurane exposure should not exceed 2 MAC·hours at flow rates of 1 to < 2 L/min. Fresh gas flow rates < 1 L/min are not recommended. Because clinical experience in administering sevoflurane to patients with renal insufficiency (creatinine > 1.5 mg/dL) is limited, its safety in these patients has not been established. Sevoflurane may be associated with glycosuria and proteinuria when used for long procedures at low flow rates. The safety of low flow sevoflurane on renal function was evaluated in patients with normal preoperative renal function. One study compared sevoflurane (N = 98) to an active control (N = 90) administered for ≥ 2 hours at a fresh gas flow rate of ≤ 1 Liter/minute. Per study defined criteria, one patient in the sevoflurane group developed elevations of creatinine, in addition to glycosuria and proteinuria. This patient received sevoflurane at fresh gas flow rates of ≤ 800 mL/minute. Using these same criteria, there were no patients in the active control group who developed treatment emergent elevations in serum creatinine. Sevoflurane may present an increased risk in patients with known sensitivity to volatile halogenated anesthetic agents. KOH containing CO 2 absorbents are not recommended for use with sevoflurane. Risk of Respiratory Depression Sevoflurane may cause respiratory depression, which may be augmented by opioid premedication or other agents causing respiratory depression. Monitor respiration and, if necessary, assist with ventilation (see PRECAUTIONS ). Risk of QT Prolongation Reports of QT prolongation, associated with torsade de pointes (in exceptional cases, fatal), have been received. Caution should be exercised when administering sevoflurane to susceptible patients (e.g. patients with congenital Long QT Syndrome or patients taking drugs that can prolong the QT interval). Malignant Hyperthermia In susceptible individuals, volatile anesthetic agents, including sevoflurane, may trigger malignant hyperthermia, a skeletal muscle hypermetabolic state leading to high oxygen demand. Fatal outcomes of malignant hyperthermia have been reported. In clinical studies of sevoflurane, 1 case of malignant hyperthermia was reported. The risk of developing malignant hyperthermia increases with the concomitant administration of succinylcholine and volatile anesthetic agents. Sevoflurane can induce malignant hyperthermia in patients with known or suspected susceptibility based on genetic factors or family history, including those with certain inherited ryanodine receptor ( RYR1 ) or dihydropyridine receptor ( CACNA1S ) variants (see CONTRAINDICATIONS , CLINICAL PHARMACOLOGY - Pharmacogenomics ). Signs consistent with malignant hyperthermia may include hyperthermia, hypoxia, hypercapnia, muscle rigidity (e.g., jaw muscle spasm), tachycardia (e.g., particularly that unresponsive to deepening anesthesia or analgesic medication administration), tachypnea, cyanosis, arrhythmias, hypovolemia, and hemodynamic instability. Skin mottling, coagulopathies, and renal failure may occur later in the course of the hypermetabolic process. Successful treatment of malignant hyperthermia depends on early recognition of the clinical signs. If malignant hyperthermia is suspected, discontinue all triggering agents (i.e., volatile anesthetic agents and succinylcholine), administer intravenous dantrolene sodium, and initiate supportive therapies. Consult prescribing information for intravenous dantrolene sodium for additional information on patient management. Supportive therapies include administration of supplemental oxygen and respiratory support based on clinical need, maintenance of hemodynamic stability and adequate urinary output, management of fluid and electrolyte balance, correction of acid base derangements, and institution of measures to control rising temperature. Perioperative Hyperkalemia Use of inhaled anesthetic agents has been associated with rare increases in serum potassium levels that have resulted in cardiac arrhythmias and death in pediatric patients during the postoperative period. Patients with latent as well as overt neuromuscular disease, particularly Duchenne muscular dystrophy, appear to be most vulnerable. Concomitant use of succinylcholine has been associated with most, but not all, of these cases. These patients also experienced significant elevations in serum creatine kinase levels and, in some cases, changes in urine consistent with myoglobinuria. Despite the similarity in presentation to malignant hyperthermia, none of these patients exhibited signs or symptoms of muscle rigidity or hypermetabolic state. Early and aggressive intervention to treat the hyperkalemia and resistant arrhythmias is recommended as is subsequent evaluation for latent neuromuscular disease. Pediatric Neurotoxicity Published animal studies demonstrate that the administration of anesthetic and sedation drugs that block NMDA receptors and/or potentiate GABA activity increase neuronal apoptosis in the developing brain and result in long-term cognitive deficits when used for longer than 3 hours. The clinical significance of these findings is not clear. However, based on the available data, the window of vulnerability to these changes is believed to correlate with exposures in the third trimester of gestation through the first several months of life, but may extend out to approximately three years of age in humans (see PRECAUTIONS - Pregnancy , PRECAUTIONS - Pediatric Use , ANIMAL TOXICOLOGY AND/OR PHARMACOLOGY ). Some published studies in children suggest that similar deficits may occur after repeated or prolonged exposures to anesthetic agents early in life and may result in adverse cognitive or behavioral effects. These studies have substantial limitations, and it is not clear if the observed effects are due to the anesthetic/sedation drug administration or other factors such as the surgery or underlying illness. Anesthetic and sedation drugs are a necessary part of the care of children needing surgery, other procedures, or tests that cannot be delayed, and no specific medications have been shown to be safer than any other. Decisions regarding the timing of any elective procedures requiring anesthesia should take into consideration the benefits of the procedure weighed against the potential risks. Bradycardia in Down Syndrome Episodes of severe bradycardia and cardiac arrest, not related to underlying congenital heart disease, have been reported during anesthesia induction with sevoflurane in pediatric patients with Down syndrome. In most cases, bradycardia improved with decreasing the concentration of sevoflurane, manipulating the airway, or administering an anticholinergic or epinephrine. During induction, closely monitor heart rate, and consider incrementally increasing the inspired sevoflurane concentration until a suitable level of anesthesia is achieved. Consider having ananticholinergic and epinephrine available when administering sevoflurane for induction in this patient population. Risk of Driving and Operating Machinery Performance of activities requiring me...
PRECAUTIONS
PRECAUTIONS SECTION
During the maintenance of anesthesia, increasing the concentration of sevoflurane produces dose-dependent decreases in blood pressure. Due to sevoflurane's insolubility in blood, these hemodynamic changes may occur more rapidly than with other volatile anesthetics. Excessive decreases in blood pressure or respiratory depression may be related to depth of anesthesia and may be corrected by decreasing the inspired concentration of sevoflurane. Rare cases of seizures have been reported in association with sevoflurane use (see PRECAUTIONS - Pediatric Use , ADVERSE REACTIONS ). The recovery from general anesthesia should be assessed carefully before a patient is discharged from the post-anesthesia care unit.
ADVERSE REACTIONS
ADVERSE REACTIONS SECTION
Clinical Trials Experience Adverse events are derived from controlled clinical studies conducted in the United States, Canada, and Europe. The reference drugs were isoflurane, enflurane, and propofol in adults and halothane in pediatric patients. The studies were conducted using a variety of premedications, other anesthetics, and surgical procedures of varying length. Most adverse events reported were mild and transient, and may reflect the surgical procedures, patient characteristics (including disease) and/or medications administered. Of the 5182 patients enrolled in the clinical studies, 2906 were exposed to sevoflurane, including 118 adults and 507 pediatric patients who underwent mask induction. Each patient was counted once for each type of adverse event. Adverse events reported in patients in clinical studies and considered to be possibly or probably related to sevoflurane are presented within each body system in order of decreasing frequency in the following listings. One case of malignant hyperthermia was reported in pre-registration clinical studies. Adverse Events During the Induction Period (from Onset of Anesthesia by Mask Induction to Surgical Incision) Incidence > 1% Adult Patients (N = 118) Cardiovascular Bradycardia 5%, Hypotension 4%, Tachycardia 2% Nervous System Agitation 7% Respiratory System Laryngospasm 8%, Airway obstruction 8%, Breathholding 5%, Cough Increased 5% Pediatric Patients (N = 507) Cardiovascular Tachycardia 6%, Hypotension 4% Nervous System Agitation 15% Respiratory System Breathholding 5%, Cough Increased 5%, Laryngospasm 3%, Apnea 2% Digestive System Increased salivation 2% Adverse Events During Maintenance and Emergence Periods, Incidence > 1% (N = 2906) Body as a whole Fever 1%, Shivering 6%, Hypothermia 1%, Movement 1%, Headache 1% Cardiovascular Hypotension 11%, Hypertension 2%, Bradycardia 5%, Tachycardia 2% Nervous System Somnolence 9%, Agitation 9%, Dizziness 4%, Increased salivation 4% Digestive System Nausea 25%, Vomiting 18% Respiratory System Cough increased 11%, Breathholding 2%, Laryngospasm 2% Adverse Events, All Patients in Clinical Studies (N = 2906), All Anesthetic Periods, Incidence < 1% (Reported in 3 or More Patients) Body as a whole Asthenia, Pain Cardiovascular Arrhythmia, Ventricular Extrasystoles, Supraventricular Extrasystoles, Complete AV Block, Bigeminy, Hemorrhage, Inverted T Wave, Atrial Fibrillation, Atrial Arrhythmia, Second Degree AV Block, Syncope, S-T Depressed Nervous System Crying, Nervousness, Confusion, Hypertonia, Dry Mouth, Insomnia Respiratory System Sputum Increased, Apnea, Hypoxia, Wheezing, Bronchospasm, Hyperventilation, Pharyngitis, Hiccup, Hypoventilation, Dyspnea, Stridor Metabolism and Nutrition Increases in LDH, AST, ALT, BUN, Alkaline Phosphatase, Creatinine, Bilirubinemia, Glycosuria, Fluorosis, Albuminuria, Hypophosphatemia, Acidosis, Hyperglycemia Hemic and Lymphatic System Leucocytosis, Thrombocytopenia Skin and Special Senses Amblyopia, Pruritus, Taste Perversion, Rash, Conjunctivitis Urogenital Urination Impaired, Urine Abnormality, Urinary Retention, Oliguria See WARNINGS for information regarding malignant hyperthermia. Post-Marketing Experience The following adverse events have been identified during post-approval use of sevoflurane USP. Due to the spontaneous nature of these reports, the actual incidence and relationship of sevoflurane USP to these events cannot be established with certainty. Central Nervous System Seizures — Post-marketing reports indicate that sevoflurane use has been associated with seizures. The majority of cases were in children and young adults, most of whom had no medical history of seizures. Several cases reported no concomitant medications, and at least one case was confirmed by EEG. Although many cases were single seizures that resolved spontaneously or after treatment, cases of multiple seizures have also been reported. Seizures have occurred during, or soon after sevoflurane induction, during emergence, and during post-operative recovery up to a day following anesthesia. Delirium Cardiac Cardiac arrest QT prolongation associated with Torsade de Pointe Bradycardia in patients with Down syndrome Hepatic Cases of mild, moderate and severe post-operative hepatic dysfunction or hepatitis with or without jaundice have been reported. Histological evidence was not provided for any of the reported hepatitis cases. In most of these cases, patients had underlying hepatic conditions or were under treatment with drugs known to cause hepatic dysfunction. Most of the reported events were transient and resolved spontaneously (see PRECAUTIONS ). Hepatic necrosis Hepatic failure Other Malignant hyperthermia (see CONTRAINDICATIONS , WARNINGS ) Allergic reactions, such as rash, urticaria, pruritus, bronchospasm, and anaphylactic reactions (see CONTRAINDICATIONS ) Reports of hypersensitivity (including contact dermatitis, rash, dyspnea, wheezing, chest discomfort, swelling face, or anaphylactic reaction) have been received, particularly in association with long-term occupational exposure to inhaled anesthetic agents, including sevoflurane (see SAFETY AND HANDLING - Occupational Caution ). Laboratory Findings Transient elevations in glucose, liver function tests, and white blood cell count may occur as with use of other anesthetic agents.
OVERDOSAGE
OVERDOSAGE SECTION
In the event of overdosage, or what may appear to be overdosage, the following action should be taken: discontinue administration of sevoflurane, maintain a patent airway, initiate assisted or controlled ventilation with oxygen, and maintain adequate cardiovascular function.
DOSAGE AND ADMINISTRATION
DOSAGE & ADMINISTRATION SECTION
The concentration of sevoflurane being delivered from a vaporizer should be known. This may be accomplished by using a vaporizer calibrated specifically for sevoflurane. The administration of general anesthesia must be individualized based on the patient's response. Replacement of Desiccated CO 2 Absorbents When a clinician suspects that the CO 2 absorbent may be desiccated, it should be replaced. The exothermic reaction that occurs with sevoflurane and CO 2 absorbents is increased when the CO 2 absorbent becomes desiccated, such as after an extended period of dry gas flow through the CO 2 absorbent canisters (see PRECAUTIONS ). Pre-anesthetic Medication No specific premedication is either indicated or contraindicated with sevoflurane. The decision as to whether or not to premedicate and the choice of premedication is left to the discretion of the anesthesiologist. Induction Sevoflurane has a nonpungent odor and does not cause respiratory irritability; it is suitable for mask induction in pediatrics and adults. Maintenance Surgical levels of anesthesia can usually be achieved with concentrations of 0.5 -3% sevoflurane with or without the concomitant use of nitrous oxide. Sevoflurane can be administered with any type of anesthesia circuit. Table 9. MAC Values for Adults and Pediatric Patients According to Age Age of Patient (years) Sevoflurane in Oxygen Sevoflurane in 65% N 2 O/35% O 2 0 -1 months # 3.3% 1 -< 6 months 3.0% 6 months -< 3 years 2.8% 2.0% @ 3 -12 2.5% 25 2.6% 1.4% 40 2.1% 1.1% 60 1.7% 0.9% 80 1.4% 0.7% # Neonates are full-term gestational age. MAC in premature infants has not been determined. @ In 1 -< 3 year old pediatric patients, 60% N 2 O/40% O 2 was used.
HOW SUPPLIED
HOW SUPPLIED SECTION
Sevoflurane USP, Volatile Liquid for Inhalation, is packaged in type III amber glass bottles containing 250 mL sevoflurane USP, NDC # 58181-5200-1.
SAFETY AND HANDLING
SPL UNCLASSIFIED SECTION
Occupational Caution There is no specific work exposure limit established for sevoflurane. However, the National Institute for Occupational Safety and Health has recommended an 8 hour time-weighted average limit of 2 ppm for halogenated anesthetic agents in general (0.5 ppm when coupled with exposure to N 2 O) (see ADVERSE REACTIONS ). Storage Store at controlled room temperature, 15° -30°C (59° -86°F). See USP.
ANIMAL TOXICOLOGY AND/OR PHARMACOLOGY
ANIMAL PHARMACOLOGY & OR TOXICOLOGY SECTION
Published studies in animals demonstrate that the use of anesthetic agents during the period of rapid brain growth or synaptogenesis results in widespread neuronal and oligodendrocyte cell loss in the developing brain and alterations in synaptic morphology and neurogenesis. Based on comparisons across species, the window of vulnerability to these changes is believed to correlate with exposures in the third trimester through the first several months of life, but may extend out to approximately 3 years of age in humans. In primates, exposure to 3 hours of an anesthetic regimen that produced a light surgical plane of anesthesia did not increase neuronal cell loss; however, treatment regimens of 5 hours or longer increased neuronal cell loss. Data in rodents and in primates suggest that the neuronal and oligodendrocyte cell losses are associated with subtle but prolonged cognitive deficits in learning and memory. The clinical significance of these nonclinical findings is not known, and healthcare providers should balance the benefits of appropriate anesthesia in pregnant women, neonates and young children who require procedures against the potential risks suggested by the nonclinical data (see WARNINGS -Pediatric Neurotoxicity , PRECAUTIONS -Pregnancy , PRECAUTIONS -Pediatric Use ). Product of China Product inquiries should be directed to NextSource Pharma, Pompano Beach, Florida, 33069, USA. To report SUSPECTED ADVERSE REACTIONS , contact NextSource Pharma at 1-855-672-2468 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. Manufactured for: NextSource Pharma, Pompano Beach, Florida 33069, USA Manufactured by: Shandong New Time Pharmaceutical Co., Ltd., No. 1, North Outer Ring Road, Feixian, Shandong 273400, China. LBL116 September 2023
PRINCIPAL DISPLAY PANEL - NDC - 58181-5200-1 Box Label
PACKAGE LABEL.PRINCIPAL DISPLAY PANEL
NDC 58181-5200-1 Sevoflurane USP 250 mL Inhalation Anesthetic NextSource Pharma Contains Sevoflurane USP 250 mL. For inhalation anesthesia. Usual dosage: see package insert. Store at controlled room temperature 15° to 30°C (59° to 86°F). See USP. 3 58181 52001 6 Manufactured by: Shandong New Time Pharmaceutical Co., Ltd for: NextSource Pharma Pompano Beach, FL 33069 LBL116 REV092023 GTIN: 10358181520013 LOT EXP SN
PRINCIPAL DISPLAY PANEL - NDC - 58181-5200-1 - Container Label
PACKAGE LABEL.PRINCIPAL DISPLAY PANEL
NDC 58181-5200-1 Sevoflurane USP 250 mL Inhalation Anesthetic NextSource Pharma Rx only Contains sevoflurane USP 250 mL. For inhalation anesthesia. Usual dosage: see insert. Store at controlled room temperature 15° to 30°C (59° to 86°F). See USP. Manufactured by: Shandong New Time Pharmaceutical Co., Ltd. for: NextSource Pharma Pompano Beach, FL 33069 LBL116 REV092023 GTIN: 10358181520013 LOT EXP 3 58181 52001 6
