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Liposyn

Last reviewed on RxList: 11/22/2016
Drug Description

Liposyn® II
(Intravenous Fat Emulsion)

DESCRIPTION

Liposyn II (Intravenous Fat Emulsion) is a sterile, nonpyrogenic fat emulsion for intravenous administration. It is supplied in both a 10% and 20% concentration.

Liposyn II (intravenous fat emulsion) 10% contains 5% safflower oil, 5% soybean oil, up to 1.2% egg phosphatides added as an emulsifier and 2.5% glycerin in water for injection. May contain sodium hydroxide for pH adjustment. pH 8.0 (6.0 — 9.0). Liposyn II (intravenous fat emulsion) 10% has an osmolarity of 276 mOsmol/liter (actual). The total caloric value of Liposyn II (intravenous fat emulsion) 10% including fat, phospholipid and glycerol is 1.1 kcal/mL. Of this total, approximately 0.6 kcal/mL is supplied by linoleic acid.

Liposyn II (intravenous fat emulsion) 20% contains 10% safflower oil, 10% soybean oil, 1.2% egg phosphatides and 2.5% glycerin in water for injection. May contain sodium hydroxide for pH adjustment. pH 8.3 (6.0 _ 9.0). Liposyn II (intravenous fat emulsion) 20% has an osmolarity of 258 mOsmol/liter (actual). The total caloric value of Liposyn II (intravenous fat emulsion) 20% including fat, phospholipid and glycerol is 2 kcal/mL. Of this total, approximately 1.2 kcal/mL are supplied by linoleic acid.

Both Liposyn II (intravenous fat emulsion) 10% and Liposyn II (intravenous fat emulsion) 20% contain emulsified fat particles of approximately 0.4 micron in diameter, similar to naturally occurring chylomicrons.

Safflower oil and Soybean Oil, USP are mixtures of neutral triglycerides with the following structure:

Safflower oil Structural Formula Illustration

Soybean Oil Structural Formula Illustration

are saturated and unsaturated fatty acid residues. The major component fatty acids of the 50/50 safflower/soybean oil mixture are approximately 65.8% linoleic, 17.7% oleic, 8.8% palmitic, 3.4% stearic, and 4.2% linolenic acid. These fatty acids have the following chemical and structural formulas:

Major component fatty acids Structural Formula Illustration

Egg phosphatides, purified, are primarily a mixture of naturally occurring phospholipids which are isolated from the egg yolk. These phospholipids have the following general structure:

Egg phosphatides - Structural Formula Illustration

Egg phosphatides - Structural Formula Illustration

are the same saturated and unsaturated fatty acid residues that abound in neutral fats. R3 is primarily either the choline [HOCH2CH2N(CH3)3OH] ester or ethanolamine (HOCH2CH2NH2) ester of phosphoric acid (H3PO4).

Glycerin, USP is chemically designated C3H803 and is a clear colorless, hygroscopic syrupy liquid. It has the following structural formula:

Glycerin Structural Formula Illustration

For Consumers

What are the precautions when taking intravenous fat emulsion (Liposyn II)?

See also Warning section.

Before receiving the fat emulsion, tell your doctor or pharmacist if you are allergic to it; or to eggs, safflower oil, or soy/peanut found in some brands; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This product should not be used if you have certain medical conditions. Before using this product, consult your doctor or pharmacist if you have: high fat (lipid) levels in the blood.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: severe liver disease, kidney disease, lung disease, anemia, blood clotting disorder.

Kidney function declines as you grow...

Indications & Dosage

INDICATIONS

Liposyn II (intravenous fat emulsion) is indicated as a source of calories for patients requiring parenteral nutrition. Where such nutrition is required for extended periods of time (more than 5 days), Liposyn II (intravenous fat emulsion) is also indicated as a source of essential fatty acids to prevent or reverse biochemical changes in fatty acid composition of plasma lipids (elevated triene/tetraene ratio) and the clinical manifestations of EFAD.

DOSAGE AND ADMINISTRATION

Liposyn II (intravenous fat emulsion) (Intravenous Fat Emulsion) should be administered as part of an intravenous total nutrition program via peripheral vein or central venous catheter.

Adult Patients

Liposyn II (intravenous fat emulsion) can provide up to 60% of daily calories at a dose not to exceed 3 g/kg of body weight per day. The other 40% should be provided by carbohydrate and amino acids.

For the prevention of essential fatty acid deficiency, the recommended daily requirement is approximately 4% of the caloric intake as linoleate. In most adult patients, this can be supplied as 500 mL of Liposyn II (intravenous fat emulsion) 10% or 250 mL of Liposyn II (intravenous fat emulsion) 20% administered twice weekly.

The initial infusion rate for the first 15 minutes should be 1 mL/minute for Liposyn II (intravenous fat emulsion) 10% and 0.5 mL/minute for Liposyn II (intravenous fat emulsion) 20%. If no adverse effects are observed during this initial infusion, the rate can be increased to allow no more than 500 mL of Liposyn II (intravenous fat emulsion) 10% or 250 mL of Liposyn II (intravenous fat emulsion) 20% to be given over a period of four to six hours.

Pediatric Patients

Liposyn II (intravenous fat emulsion) can provide up to 60% of daily calories at a dose not to exceed 4 g/kg of body weight per day. The other 40% should be provided by carbohydrate and amino acids.

For the prevention of essential fatty acid deficiency, the recommended daily requirement is approximately 4% of the caloric intake as linoleate. The daily dosage of Liposyn II (intravenous fat emulsion) ranges from 5 mL to 10 mL per kilogram for the 10% emulsion and 2.5 mL to 5 mL per kilogram for the 20% emulsion, depending upon the size and maturity of the patient.

The infusion should be started at a rate of 0.1 mL/minute for the first 15 minutes. If no adverse effects are observed during this initial infusion, the rate can be increased to allow no more than 100 mL of Liposyn II (intravenous fat emulsion) 10% or 50 mL of Liposyn II (intravenous fat emulsion) 20% per hour.

Administration

With the exception of heparin at 1 to 2 units/mL of fat emulsion, additives to the Liposyn II (intravenous fat emulsion) bottle are contraindicated.

Partly used containers must not be stored for later use. Filters of less than 1.2 micron porosity must not be used with Liposyn II (intravenous fat emulsion) .

Do not use any bottle in which there appears to be an oiling out of the emulsion.

See CONTRAINDICATIONS regarding mixing this emulsion with other I.V. fluids or additives.

Liposyn II (intravenous fat emulsion) can be infused into the same central or peripheral vein as the carbohydrate/amino acid solutions by means of a short Y-connector near the infusion site. This allows for mixing of the solutions immediately before entering the vein or for alternation of each solution. Flow rates of each solution should be controlled separately by infusion pumps, if these are used. Fat emulsion may also be infused through a separate peripheral site. If desired, heparin may be added to Liposyn II (intravenous fat emulsion) at a concentration of 1 to 2 units per mL prior to administration. Alternatively, studies have documented the stability of Liposyn® II (intravenous fat emulsion) 10% and 20%, necessary Hospira electrolytes, Hospira trace metals, and Hospira 10% through 70% Dextrose Injection, USP in a TPN admixture container with the following Hospira amino acid solutions:

Concentrations Aminosyn (pH 6) Aminosyn II Aminosyn II w/Electrolytes
7% X X X
8.5% X X X
10% X X X

Admixtures were compounded in either a nonphthalate polyvinylchloride (PVC) or an ethylene vinyl acetate (EVA) container. (See NOTE). SEE Mixing Instructions For Combined Administration.

Compounded admixtures may be stored under refrigeration for up to 24 hours. Administration of admixtures should be completed within 24 hours after removal from refrigeration.

Conventional administration sets contain polyvinyl chloride (PVC) components that have DEHP (diethylhexyl phthalate) as a plasticizer. Fat-containing fluids such as Liposyn II (intravenous fat emulsion) extract DEHP from this PVC component, and it may be advisable to consider infusion of Liposyn II (intravenous fat emulsion) or the 3-in-1 admixture through a non-DEHP administration set.

A 1.2 micron air-eliminating filter can be used to deliver either a stable 3-in-1 admixture containing Liposyn II (intravenous fat emulsion) or the emulsion alone. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

Mixing Instructions For Combined Administration

Caution should be exercised when admixing Liposyn II (Intravenous Fat Emulsion).

It is absolutely essential that the admixture be prepared using strict aseptic techniques as this nutrient mixture is a good growth media for microorganisms.

Studies have documented the stability of Liposyn®II 10% and 20% with necessary Hospira electrolytes, Hospira trace metals, and Hospira 10% through 70% Dextrose Injection, USP in a TPN admixture container with the following Hospira amino acid solutions:

Concentrations Aminosyn (pH 6) Aminosyn II Aminosyn II w/Electrolytes
7% X X X
8.5% X X X
10% X X X

NOTE: The TPN admixture containers used in the stability studies were formulated to minimize lipid/container interactions. The principal bag materials were a nonphthalate polyvinylchloride (PVC) or ethylene vinyl acetate (EVA). The only significant leachable from EVA is acetate. Acetate is found in total parenteral nutrition (TPN) admixtures as acetic acid, used for adjusting the pH of amino acid solutions, and as lysine acetate. The level of leachable acetate from EVA is not sufficient to alter the final acetate concentration significantly. Compounded admixtures may be stored under refrigeration for up to 24 hours. Administration of admixtures should be completed within 24 hours after removal from refrigeration. Reference should be made to the individual package inserts for detailed information on each component.

The prime destabilizers of emulsions are excessive acidity (low pH) and inappropriate electrolyte content. Careful consideration should be given to the dosage levels of the divalent cations (Ca++ and Mg++) administered, as these have been shown to cause emulsion instability. Amino acid solutions exert a buffering effect, protecting the emulsion.

The following proper mixing sequence must be followed to minimize pH-related problems by ensuring that typically acidic dextrose injections are not mixed with lipid emulsion alone:

  1. Transfer Liposyn® II (Intravenous Fat Emulsion) to the TPN admixture container.
  2. Transfer Aminosyn® II (An Amino Acid Injection), Aminosyn II w/Electrolytes, or Aminosyn (pH 6).
  3. Transfer Hospira Dextrose Injection, USP.
  4. Perform addition of necessary Hospira electrolyte and Hospira trace metal additives.

Admixing should be accompanied by gentle agitation to avoid localized concentration effects. Simultaneous or sequential mixing of Liposyn II (intravenous fat emulsion) with other nutritional substrates using an automated, gravimetric pumping system is considered an acceptable method for admixture compounding, especially for institutions with a high volume of 3-in-1 admixtures.

HOW SUPPLIED

Liposyn II (Intravenous Fat Emulsion) 10% and 20% is a white to slightly off-white emulsion with no evidence of oiling out of the emulsion.

Liposyn II (intravenous fat emulsion) 10% (List No. 9786) is supplied in 200, 250 and 500 mL single-dose containers.
Liposyn II (intravenous fat emulsion) 20% (List No. 9789) is supplied in 200, 250 and 500 mL single-dose containers.

Store at 20 to 25°C (68 to 77°F). [See USP Controlled Room Temperature.] Protect from freezing.

Revised: August, 2005. Hospira, Inc., Lake Forest, IL 60045, USA. FDA Rev date: 4/14/2003

Side Effects & Drug Interactions

SIDE EFFECTS

Sepsis due to contamination of administration equipment and thrombophlebitis due to vein irritation from concurrently administered hypertonic solutions have been encountered. These are attributable to I.V. therapy in general or to the type of infusion administered.

Adverse reactions directly related to fat emulsions are of two types: (1) immediate (acute) and (2) long term (chronic). In studies of lipid products in general, the following immediate reactions have been noted: Allergic reactions, hyperlipemia, dyspnea, cyanosis, flushing, dizziness, headache, sleepiness, nausea, vomiting, hyperthermia, sweating, chest and back pain, thrombocytopenia (rarely in neonates), hypercoagulability and transient increases in liver enzymes.

The following reactions have been noted with long-term therapy with lipid infusions in general: Hepatomegaly, jaundice due to central lobular cholestasis, splenomegaly, thrombocytopenia, leucopenia, transient increases in liver function tests, overloading syndrome and deposition of brown pigment (''fat pigment'') in the reticuloendothelial tissue of the liver. The significance of this last occurrence and its cause are unknown.

DRUG INTERACTIONS

No information provided.

Warnings & Precautions

WARNINGS

Deaths in preterm infants after infusion of intravenous fat emulsions have been reported in the medical literature.1,2Autopsy findings included intravascular fat accumulation in the lungs. Treatment of premature and low birth weight infants with intravenous fat emulsion must be based upon careful benefit-risk assessment. Strict adherence to the recommended total daily dose is mandatory; hourly infusion rate should be as slow as possible in each case and should not in any case exceed 1 g/kg in four hours. Premature and small for gestational age infants have poor clearance of intravenous fat emulsion and increased free fatty acid plasma levels following fat emulsion infusion; therefore, serious consideration must be given to administration of less than the maximum recommended doses in these patients in order to decrease the likelihood of intravenous fat overload. The infant's ability to eliminate infused fat from the circulation must be carefully monitored (such as triglyceride and/or plasma free fatty acid levels). The lipemia must clear between daily infusions.

Caution should be exercised in administering Liposyn II (Intravenous Fat Emulsion) to patients with severe liver damage, pulmonary disease, anemia or blood coagulation disorders or when there is danger of fat embolism. The too rapid administration of Liposyn II (intravenous fat emulsion) can cause fluid and/or fat overloading resulting in dilution of serum electrolyte concentrations, overhydration, congested states, pulmonary edema, impaired pulmonary diffusion capacity or metabolic acidosis.

Caution should be exercised when admixing Liposyn II (Intravenous Fat Emulsion).

WARNING: This product contains aluminum that may be toxic. Aluminum may reach toxic levels with prolonged parenteral administration if kidney function is impaired. Premature neonates are particularly at risk because their kidneys are immature, and they require large amounts of calcium and phosphate solutions, which contain aluminum.

Research indicates that patients with impaired kidney function, including premature neonates, who receive parenteral levels of aluminum at greater than 4 to 5 mcg/kg/day accumulate aluminum at levels associated with central nervous system and bone toxicity. Tissue loading may occur at even lower rates of administration.

PRECAUTIONS

Because free fatty acids displace bilirubin bound to albumin, the use of lipid infusions in jaundiced or premature infants should be undertaken with caution.

During Liposyn II (intravenous fat emulsion) administration, the patient's hemogram, blood coagulation, liver function, platelet count and plasma lipid profile must be closely monitored. The lipemia must clear between daily infusions. Liposyn II (intravenous fat emulsion) should be discontinued should a significant abnormality in any one of these parameters be attributed to the infusion.

Pregnancy Category C

Animal reproduction studies have not been conducted with Liposyn II (intravenous fat emulsion) . It is also not known whether Liposyn II (intravenous fat emulsion) can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Liposyn II (intravenous fat emulsion) should be given to a pregnant woman only if clearly needed.

Nursing Mothers

It is not known whether the drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when Liposyn II (intravenous fat emulsion) is administered to a nursing woman.

Frequent (some advise daily) platelet counts should be done in neonatal patients receiving parenteral nutrition with Liposyn II (intravenous fat emulsion) .

Liposyn II (intravenous fat emulsion) is supplied in single-dose containers. Partially used containers must be discarded and should not be stored or resterilized for later use. Do not administer the contents of any container in which the emulsion appears to be oiling out.

This product contains no more than 25 mcg/L of aluminum.

REFERENCES

1. Levene M, Wigglesworth J, Desai R. Pulmonary fat accumulation after Intralipid infusion in the preterm infant.Lancet II: 815-818, (Oct. 18), 1980.

2. Dahms B, Halpin T. Pulmonary arterial lipid deposit in newborn infants receiving intravenous lipid infusion. J. Pediatrics: 97:800-805, (Nov.), 1980.

Overdosage & Contraindications

OVERDOSE

In the event of fat overload during therapy, stop the infusion of Liposyn II (Intravenous Fat Emulsion) until visual inspection of the plasma, determination of triglyceride concentrations, or measurement of plasma light-scattering activity by nephelometry indicates the lipid has cleared. Re-evaluate the patient and institute appropriate corrective measures. See WARNINGS and PRECAUTIONS.

CONTRAINDICATIONS

The administration of Liposyn II (Intravenous Fat Emulsion) is contraindicated in patients demonstrating disturbances in normal fat metabolism such as pathologic hyperlipemia, lipoid nephrosis or acute pancreatitis if accompanied by hyperlipemia.

Clinical Pharmacology

CLINICAL PHARMACOLOGY

Liposyn II (intravenous fat emulsion) (Intravenous Fat Emulsion) provides the patient requiring parenteral nutrition with a source of calories and the essential fatty acids normally obtained from a nutritionally complete oral diet. The supplemental polyunsaturated fat prevents biochemical changes of essential fatty acid deficiency (EFAD) and prevents and reverses EFAD clinical manifestations (e.g., scaliness of skin, growth retardation, poor wound healing and sparse hair growth).

The infused fat particles are cleared from the bloodstream in a manner thought to be similar to the clearing of chylomicrons. Following infusion, there is a transient increase in plasma triglycerides. The triglycerides are hydrolyzed to free fatty acids and glycerol by the enzyme, lipoprotein lipase. The free fatty acids either enter the tissues (where they may be oxidized or resynthesized into triglycerides and stored) or circulate in the plasma, bound to albumin. In the liver, circulating free fatty acids are oxidized or converted to very low density lipoproteins that re-enter the bloodstream.

Phosphatides are the hydrophobic components of membranes and provide electrically insulated layers. They are involved in the formation of membrane structures. Choline prevents the deposition of fat in the liver.

Glycerol is metabolized to carbon dioxide and glycogen or is used in the synthesis of body fats.

Medication Guide
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