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SMOFLIPID
(lipid injectable emulsion)
WARNING
DEATH IN PRETERM INFANTS
Smoflipid is a sterile, nonpyrogenic, white, homogenous lipid emulsion for intravenous infusion. The lipid content of Smoflipid is 0.20 g/mL, and comprises a mixture of soybean oil, medium-chain triglycerides (MCTs), olive oil, and fish oil. The mean essential fatty acid content of Smoflipid is 35 mg/mL (range of 28 to 50 mg/mL) linoleic acid (omega-6) and 4.5 mg/mL (range of 3 to 7 mg/mL) α-linolenic acid (omega-3). The phosphate content is 15 mmol/L.
The total energy content, including fat, phospholipids, and glycerol is 2,000 kcal/L.
Each 100 mL of Smoflipid contains approximately 6 g soybean oil, 6 g MCT, 5 g olive oil, 3 g fish oil, 1.2 g egg phospholipids, 2.5 g glycerin, 16.3 to 22.5 mg all-rac-α-tocopherol, 0.3 g sodium oleate, water for injection, and sodium hydroxide for pH adjustment 3 (pH 6 to 9).
Smoflipid has an osmolality of approximately 380 mOsm/kg water (which represents an osmolarity of 270 mOsm/L).
The oils included in Smoflipid consist of a mixture of triglycerides of predominantly unsaturated fatty acids with the following structure:
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where
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and
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are saturated and unsaturated fatty acid residues. The major components of the fatty acids in Smoflipid are oleic acid (23% to 35%), linoleic acid (14% to 25%), caprylic acid (13% to 24%), palmitic acid (7% to 12%), capric acid (5% to 15%), stearic acid (1.5% to 4%), α-linolenic acid (1.5% to 3.5%), eicosapentaenoic acid (EPA; 1% to 3.5%), and docosahexaenoic acid (DHA; 1% to 3.5%).
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Smoflipid contains no more than 25 mcg/L of aluminum.
The container is not made with natural rubber latex, PVC, or DEHP.
Smoflipid is indicated in adults as a source of calories and essential fatty acids for parenteral nutrition when oral or enteral nutrition is not possible, insufficient, or contraindicated.
The omega-6: omega-3 fatty acid ratio and Medium Chain Triglycerides in Smoflipid have not been shown to improve clinical outcomes compared to other intravenous lipid emulsions [See Clinical Studies].
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Inspect the bag and contents prior to administration. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Inspect Smoflipid to ensure that the emulsion has not separated. The lipid emulsion should be a homogenous liquid with a milky appearance. Discard the bag if there appears to be a phase separation of the emulsion, or if any signs of discoloration, particulates, and/or leakage are observed.
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For Single Use Only
Discard unused portion.
Simultaneous transfer of amino acid injection, dextrose injection, and Smoflipid to the PN container is also permitted. Use gentle agitation during admixing to minimize localized concentration effects; shake bags gently after each addition.
Discard the admixture if any of these are observed.
Smoflipid is a lipid injectable emulsion with a lipid content of 0.2 g/mL available in 100 mL, 250 mL, and 500 mL.
Smoflipid is a sterile lipid injectable emulsion with a lipid content of 0.2 gram/mL available in the following sizes:
Smoflipid should be stored at 20° to 25°C (68° to 77°F). See USP Controlled Room Temperature. Avoid excessive heat. Do not freeze. If accidentally frozen, discard bag. Store in overpouch until ready for use.
After removing the overpouch, Smoflipid should be infused immediately. Chemical and physical in-use stability has been demonstrated for 24 hours at 25°C. If not used immediately, storage should not be longer than 24 hours at 2° to 8°C (36° to 46°F). After removal from storage, the product should be infused within 24 hours.
Admixtures containing Smoflipid should be infused immediately. If not used immediately, the product should not be stored longer than 24 hours at 2° to 8°C (36° to 46°F). After removal from storage, the emulsion should be infused within 24 hours.
REFERENCES
1. Mirtallo J, Canada T, Johnson D, Kumpf V, Petersen C, Sacks G, et al. Task Force for the Revision of Safe Practices for Parenteral Nutrition, Special Report: Safe practices for parenteral nutrition. JPEN. 2004:28 (6):S53-S55.
Manufactured by: FRESENIUS KABI, 6 Uppsala, Sweden. Revised May 2016
Adverse reactions described elsewhere in labeling:
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.
The safety database for Smoflipid reflects exposure in 229 patients exposed for 5 days to 4 weeks in 5 clinical trials. The pooled population exposed to Smoflipid was adult patients up to 89 years old (20 to 89 years of age), 43% female, and 99% Caucasian. The most frequently reported medical histories in the Smoflipid group were surgical and medical procedures (84%), neoplasms (57%), gastrointestinal disorders (53%), vascular disorders (37%), and infections and infestations (20%).
Smoflipid was used as a component of PN which also included dextrose, amino acids, vitamins, and trace elements. Two of the 5 studies were performed with Smoflipid as a component of PN delivered in a 3-chamber bag.
Adverse reactions occurring in at least 1% of patients who received Smoflipid are shown in Table 2.
Table 2: Adverse Reactions in > 1% of Patients Treated with Smoflipid
| Adverse Reaction | Number of Patients in Smoflipid Group (N=229) | Number of Patients in Comparator Group (N=230) |
| Nausea | 20 (9%) | 26 (11%) |
| Vomiting | 15 (7%) | 12 (5%) |
| Hyperglycemia | 12 (5%) | 5 (2%) |
| Flatulence | 10 (4%) | 4 (2%) |
| Pyrexia | 9 (4%) | 11 (5%) |
| Abdominal pain | 8 (4%) | 5 (2%) |
| Blood triglycerides increased | 6 (3%) | 4 (2%) |
| Hypertension | 6 (3%) | 9 (4%) |
| Sepsis | 5 (2%) | 4 (2%) |
| Dyspepsia | 5 (2%) | 1 (0%) |
| Urinary tract infection | 4 (2%) | 3 (1%) |
| Anemia | 4 (2%) | 2 (1%) |
| Device related infection | 4 (2%) | 2 (1%) |
Less common adverse reactions in ≤ 1% of patients who received Smoflipid were dyspnea, leukocytosis, diarrhea, pneumonia, cholestasis, dysgeusia, increased blood alkaline phosphatase, increased gamma-glutamyltransferase, increased C-reactive protein, tachycardia, liver function test abnormalities, headache, pruritis, dizziness, rash and thrombophlebitis.
The following adverse reactions have been identified during post-approval use of Smoflipid in countries where it is registered. Because these 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 product exposure.
Infections and Infestations: infection
Respiratory, Thoracic and Mediastinal Disorders: dyspnea
No drug interaction studies have been performed with Smoflipid. Soybean oil and olive oil have a natural content of vitamin K1 that may counteract the anticoagulant activity of coumarin and coumarin derivatives including warfarin. Monitor laboratory parameters for anticoagulant activity in patients who are on both Smoflipid 20% and coumarin or coumarin derivatives.
Included as part of the PRECAUTIONS section.
Deaths after infusion of soybean-based intravenous lipid emulsions have been reported in preterm infants. Autopsy findings included intravascular lipid accumulation in the lungs. Preterm and small-for-gestational-age infants have poor clearance of intravenous lipid emulsion and increased free fatty acid plasma levels following lipid emulsion infusion. The safe and effective use of Smoflipid in pediatric patients, including preterm infants, has not been established.
Smoflipid contains soybean oil, fish oil, and egg phospholipids, which may cause hypersensitivity reactions. Cross reactions have been observed between soybean and peanut oil. Signs or symptoms of a hypersensitivity reaction may include: tachypnea, dyspnea, hypoxia, bronchospasm, tachycardia, hypotension, cyanosis, vomiting, nausea, headache, sweating, dizziness, altered mentation, flushing, rash, urticaria, erythema, pyrexia, or chills. If a hypersensitivity reaction occurs, stop infusion of Smoflipid immediately and undertake appropriate treatment and supportive measures.
Lipid emulsions, such as Smoflipid, can support microbial growth and is an independent risk factor for the development of catheter-related bloodstream infections. The risk of infection is increased in patients with malnutrition-associated immunosuppression, long-term use and poor maintenance of intravenous catheters, or immunosuppressive effects of other concomitant conditions or drugs.
To decrease the risk of infectious complications, ensure aseptic techniques in catheter placement, catheter maintenance, and preparation and administration of Smoflipid. Monitor for signs and symptoms (fever and chills) of early infections, including laboratory test results that might indicate infection (including leukocytosis and hyperglycemia), and frequently checks of the parenteral access device and insertion site for edema, redness, and discharge.
Fat overload syndrome is a rare condition that has been reported with intravenous lipid emulsions. A reduced or limited ability to metabolize lipids accompanied by prolonged plasma clearance may result in a syndrome characterized by a sudden deterioration in the patient's condition including fever, anemia, leukopenia, thrombocytopenia, coagulation disorders, hyperlipidemia, liver fatty infiltration (hepatomegaly), deteriorating liver function, and central nervous system manifestations (e.g., coma). The cause of the fat overload syndrome is unclear. Although it has been most frequently observed when the recommended lipid dose was exceeded, cases have also been described where the lipid formulation was administered according to instructions. The syndrome is usually reversible when the infusion of the lipid emulsion is stopped.
Refeeding severely undernourished patients with PN may result in the refeeding syndrome, characterized by the intracellular shift of potassium, phosphorus, and magnesium as the patient becomes anabolic. Thiamine deficiency and fluid retention may also develop. To prevent these complications, monitor severely undernourished patients and slowly increase their nutrient intakes.
Smoflipid contains no more than 25 mcg/L of aluminum. However, with prolonged PN administration in patients with renal impairment, the aluminum levels in the patient may reach toxic levels. Preterm infants are at greater risk because their kidneys are immature, and they require large amounts of calcium and phosphate solutions, which contain aluminum.
Patients with renal impairment, including preterm infants, who receive parenteral levels of aluminum at greater than 4 to 5 mcg/kg/day accumulate aluminum to levels associated with central nervous system and bone toxicity. Tissue loading may occur at even lower rates of administration of PN products.
Parenteral nutrition-associated liver disease (PNALD) has been reported in patients who receive PN for extended periods of time, especially preterm infants, and can present as cholestasis or steatohepatitis. The exact etiology is unknown and is likely multifactorial. Intravenously administered phytosterols (plant sterols) contained in plant-derived lipid formulations have been associated with development of PNALD, although a causal relationship has not been established.
If Smoflipid-treated patients develop liver test abnormalities, consider discontinuation or dose reduction.
Impaired lipid metabolism with hypertriglyceridemia may occur in conditions such as inherited lipid disorders, obesity, diabetes mellitus, and metabolic syndrome.
To evaluate the patient’s capacity to eliminate and metabolize the infused lipid emulsion, measure serum triglycerides before the start of infusion (baseline value), at the time of each increase in dosage, and regularly throughout treatment.
In adult patients with levels > 400 mg/dL, reduce the dose of Smoflipid and monitor serum triglyceride levels to avoid the clinical consequences associated with hypertriglyceridemia. Serum triglyceride levels > 1,000 mg/dL, have been associated with an increased risk of pancreatitis.
Monitor serum triglycerides [see Hypertriglyceridemia], fluid and electrolyte status, blood glucose, liver and kidney function, blood count including platelets, and coagulation parameters throughout treatment.
Monitoring patients for signs and symptoms of essential fatty acid deficiency (EFAD) is recommended. Laboratory tests are available to determine serum fatty acids levels. Reference values should be consulted to help determine adequacy of essential fatty acid status. Increasing essential fatty acid intake (enterally or parenterally) is effective in treating and preventing EFAD.
In Smoflipid, the mean concentration of linoleic acid (an omega-6 essential fatty acid) is 35 mg/mL (range 28 to 50 mg/mL), and α-linolenic acid (an omega-3 essential fatty acid) is 4.5 mg/mL (range 3 to 7 mg/mL). There are insufficient long-term data to determine whether Smoflipid can supply essential fatty acids in adequate amounts in patients who may have increased requirements.
Content of vitamin K may counteract anticoagulant activity [seeDRUG INTERACTIONS]. The lipids contained in this emulsion may interfere with some laboratory blood tests (e.g., hemoglobin, lactate dehydrogenase [LDH], bilirubin, and oxygen saturation) if blood is sampled before lipids have cleared from the bloodstream. Lipids are normally cleared after a period of 5 to 6 hours once the lipid infusion is stopped.
Studies with Smoflipid have not been performed to evaluate the carcinogenic potential or effects on fertility.
No mutagenic effects were observed in the following in vitro studies with Smoflipid: bacterial gene mutation assay in Salmonella typhimurium, chromosomal aberration assay in human lymphocytes, and hypoxanthine phosphoribosyl transferase (HPRT) gene mutation assay in V79 cells.
In an in vivo bone marrow cytogenic study in rats, no mutagenic effect was observed.
There are no available data on risks associated with Smoflipid when used in pregnant women. Animal reproduction studies have not been conducted with Smoflipid. It is not known whether Smoflipid can cause fetal harm when administered to a pregnant woman. Consider the benefits and risks of Smoflipid when prescribing to a pregnant woman. In the US general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.
Disease-Associated Maternal And/Or Embryo/Fetal Risk
Severe malnutrition in a pregnant woman is associated with preterm delivery, low birth weight, intrauterine growth restriction, congenital malformations, and perinatal mortality. Parenteral nutrition should be considered if the pregnant woman’s nutritional requirements cannot be fulfilled by oral or enteral intake.
No data are available regarding the presence of Smoflipid in human milk, the effects on the breast fed infant, or the effects on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for Smoflipid, and any potential adverse effects on the breastfed infant from Smoflipid, or from the underlying maternal condition.
The safety and effectiveness of Smoflipid have not been established in pediatric patients. Deaths in preterm infants after infusion of intravenous lipid emulsion have been reported [see WARNINGS AND PRECAUTIONS]. Because of immature renal function, preterm infants receiving prolonged treatment with Smoflipid may be at risk of aluminum toxicity [see WARNINGS AND PRECAUTIONS]. Patients, including pediatric patients, may be at risk for PNALD [see WARNINGS AND PRECAUTIONS].
There are insufficient data from pediatric studies to establish that Smoflipid injection provides sufficient amounts of essential fatty acids (EFA) in pediatric patients. Pediatric patients may be particularly vulnerable to neurologic complications due to EFA deficiency if adequate amounts of EFA are not provided [see WARNINGS AND PRECAUTIONS]. In clinical trials of a soybean oil-based intravenous lipid emulsion product, thrombocytopenia in neonates occurred (less than 1%). Smoflipid contains soybean oil (30% of total lipids).
Energy expenditure and requirements may be lower for older adults than younger patients. Of the 354 patients in clinical studies of Smoflipid, 35% were > 65 years of age and 10% were > 75 years of age. No overall differences in the safety and efficacy of Smoflipid were observed between these patients and younger patients, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity in some older patients cannot be ruled out.
Parenteral nutrition should be used with caution in patients with hepatic impairment. Hepatobiliary disorders are known to develop in some patients without preexisting liver disease who receive parenteral nutrition, including cholestasis, hepatic steatosis, fibrosis and cirrhosis (parenteral nutrition associated liver disease), possibly leading to hepatic failure. Cholecystitis and cholelithiasis have also been observed. The etiology of these disorders is thought to be multifactorial and may differ between patients. Monitor liver function parameters closely. Patients developing signs of hepatobiliary disorders should be assessed early by a clinician knowledgeable in liver diseases in order to identify causative and contributory factors, and possible therapeutic and prophylactic interventions.
In the event of an overdose, fat overload syndrome may occur [see WARNINGS AND PRECAUTIONS]. Stop the Smoflipid infusion until triglyceride levels have normalized. The effects are usually reversible by stopping the lipid infusion. If medically appropriate, further intervention may be indicated. Lipids are not dialyzable from serum.
Use of Smoflipid is contraindicated in patients with:
Smoflipid administered intravenously provides a biologically utilizable source of calories and essential fatty acids.
Fatty acids serve as an important substrate for energy production. The most common mechanism of action for energy production derived from fatty acid metabolism is beta oxidation. Fatty acids are also important for membrane structure and function, precursors for bioactive molecules (such as prostaglandins), and as regulators of gene expression. Smoflipid causes an increase in heat production, decrease in respiratory quotient, and increase in oxygen consumption following its administration.
The efficacy of Smoflipid compared to soybean oil lipid emulsions was evaluated in three clinical trials. Of the 354 patients treated in these studies, (176 Smoflipid; 178 comparator), 62% were male, 99% were Caucasian, and ages ranged from 19 to 96 years. All patients received Smoflipid or the comparator as part of a PN regimen. Although Study 1, Study 2, and Study 3 were not adequately designed to demonstrate noninferiority of Smoflipid to the soybean oil comparator, they support Smoflipid as a source of calories and essential fatty acids in adults. The lipid dosage was variable in these studies and adjusted to the patient’s nutritional requirements. Nutritional efficacy was assessed by biomarkers of lipid metabolism, anthropometric indices (body weight, height, body mass index [BMI]), and/or biomarkers of protein metabolism (albumin) and mean changes in fatty acid parameters.
Study 1 was a double-blind, randomized, active-controlled, parallel-group, multicenter study in patients who required PN for at least 28 days. Seventy-five patients were enrolled, and 73 patients were treated with either Smoflipid or a soybean oil lipid emulsion. Changes in mean triglyceride levels from baseline values to Week 4 were similar in both the Smoflipid and comparator groups. Mean albumin levels demonstrated a comparable decrease in both groups. Mean changes in body weight (kg) and BMI (kg/m2) were similar in both the Smoflipid and comparator group.
Study 2 was a phase 3, randomized, double-blind, active-controlled, multicenter study. A total of 249 postoperative adult patients were randomized to receive either Smoflipid or a soybean oil intravenous lipid emulsion for at least 5 days as part of their total parenteral nutrition (TPN) regimen. From baseline to Day 6, mean triglyceride levels increased similarly in both the Smoflipid and comparator groups.
Study 3 was a double-blind randomized, active-controlled, parallel-group, single-centerstudy in 32 adult patients who required TPN for 10 to 14 days. Patients were treated with either Smoflipid or a soybean oil lipid emulsion. The increase in mean triglyceride levels from baseline to the final assessment was similar in both the Smoflipid and comparator groups.
Inform patients, their families, or caregivers of the following risks of Smoflipid:
