EPINEPHRINE 1 mg/mL Injection, 10 syringes
Other active recalls for Epinephrine (different manufacturers) — 2 · tap to view
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the alpha-Adrenergic Agonist class.
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🏭 Manufacturer & labeler
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🩺 Clinical
Epinephrine injection is used along with emergency medical treatment to treat life-threatening allergic reactions caused by insect bites or stings, foods, medications, latex, and other causes. Epinephrine injection is also used to treat life-threatening low blood pressure associated with septic shock (a serious condition caused by a body-wide infection that can lead to dangerously low blood pressure and organ failure) in hospitalized patients. Epinephrine is in a class of medications called alpha- and beta-adrenergic agonists (sympathomimetic agents). It works by relaxing the muscles in the ai...
Read the full MedlinePlus article ↗- Epinephrine works fast but wears off quickly — sometimes in as little as 15 to 20 minutes. Anaphylaxis can come back (this is called a biphasic reaction), and you may need addition...
- Why do I need to go to the ER after using my EpiPen or Auvi-Q if I already feel better?
- Yes, it absolutely matters. Inject into the outer thigh — you can even go through your clothing if needed. Never inject into the buttocks (that spot carries a risk of serious infec...
- Where exactly do I inject it, and does it matter?
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Epinephrine — tap one for details:
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
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UNII QTT17582CB
A strong acid used to adjust and maintain the proper pH level in liquid medicines, ensuring stability and preventing breakdown of active ingredients.
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UNII 451W47IQ8X
Sodium chloride is common table salt. It's used in medicines as a buffer to maintain proper pH, as a filler to add bulk, or to adjust the osmotic balance in liquid formulations.
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UNII 4VON5FNS3C
Sodium metabisulfite is a preservative derived from sulfur compounds. It prevents microbial growth and oxidation in medicines, helping extend shelf life and maintain product stability.
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UNII 059QF0KO0R
Water is a liquid solvent that dissolves and mixes ingredients together in liquid medicines, syrups, and injections. It helps distribute the active drug evenly throughout the product.
4 inactive ingredients listed in the exact product block matched to this NDC.
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ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · quarterly | No Part D plan price is available for this NDC in our data. | |
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🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Epinephrine 1 mg/mLthis 54288-0117-10 | BPI | 10 syringes | — | AP | FDA listed | — |
| Epinephrine 1 mg/mL 71872-7117-01 | Medical | 1 ampule | — | AP | FDA listed | — |
| Epinephrine 1 mg/mL 00404-9857-01 | Henry | 1 ampule | — | AP | FDA listed | — |
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⏳ Availability & generic status
The FDA lists approved generic versions of this medicine, but that does not always mean a pharmacy can get one today. Patent rules, launch agreements, supply and pricing can affect when generics actually arrive.
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📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
🔬 Reported adverse events (FAERS)
Top reported reactions
Age at onset
Reporter sex
Serious outcomes
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📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 54288-0117-10 You're viewing this | 10 SYRINGE, GLASS in 1 CARTON (54288-117-10) / 1 mL in 1 SYRINGE, GLASS (54288-117-01) | 2023-05-24 | Active |
🧭 About this NDC listing & data coverage
What data is (and isn’t) available for this NDC — tap to expand
| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | ✓ Available |
| Inactive ingredients (structured) | ✓ Available |
| NADAC pharmacy acquisition price (CMS) | — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey. |
| Orange Book / therapeutic-equivalence data | ✓ Available |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
Questions about this listing
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📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
1 INDICATIONS AND USAGE Epinephrine is a non-selective alpha and beta adrenergic agonist indicated: To increase mean arterial blood pressure in adult patients with hypotension associated with septic shock. (1.1)
1.1Hypotension associated with Septic Shock Epinephrine Injection USP, 1 mg/mL is indicated to increase mean arterial blood pressure in adult patients with hypotension associated with septic shock.
⏱️ Dosage and Administration ▾
2 DOSAGE AND ADMINISTRATION Hypotension associated with septic shock (2.2): o Dilute epinephrine in dextrose solution prior to infusion. o Infuse epinephrine into a large vein. o Titrate 0.05 mcg/kg/min to 2 mcg/kg/min to achieve desired blood pressure. o Wean gradually.
2.1General Considerations Inspect visually for particulate matter and discoloration prior to administration, whenever solution and container permit. Do not use if the solution is colored or cloudy, or if it contains particulate matter. Discard any unused portion.
2.2Hypotension associated with Septic Shock Dilute epinephrine in 5% Dextrose Injection or 5 % Dextrose and 0.9% Sodium Chloride Injection. These dextrose containing fluids provide protection against significant loss of potency by oxidation. Administration in 0.9 % Sodium Chloride Injection alone is not recommended .
Whole blood or plasma, if indicated to increase blood volume, should be administered separately. Add 1 mL (1 mg) of epinephrine from its Syringe to 1,000 mL of a 5% Dextrose containing solution. Each mL of this dilution contains 1 mcg of epinephrine.
Correct blood volume depletion as fully as possible before any vasopressor is administered. When, as an emergency measure, intraaortic pressures must be maintained to prevent cerebral or coronary artery ischemia, epinephrine can be administered before and concurrently with blood volume replacement. Whenever possible, give infusions of epinephrine into a large vein.
Avoid using a catheter tie-in technique, because the obstruction to blood flow around the tubing may cause stasis and increased local concentration of the drug. Occlusive vascular diseases (for example, atherosclerosis, arteriosclerosis, diabetic endarteritis, Buerger’s disease) are more likely to occur in the lower than in the upper extremity; therefore, avoid the veins of the leg in elderly patients or in those suffering from such disorders. There is potential for gangrene in a lower extremity when infusions of catecholamine are given in an ankle vein.
To provide hemodynamic support in septic shock associated hypotension in adult patients, the suggested dosing infusion rate of intravenously administered epinephrine is 0.05 mcg/kg/min to 2 mcg/kg/min, and is titrated to achieve a desired mean arterial pressure (MAP). The dosage may be adjusted periodically, such as every 10 to 15 minutes, in increments of 0.05 mcg/kg/min to 0.2 mcg/kg/min, to achieve the desired blood pressure goal. Continuous epinephrine infusion is generally required over several hours or days until the patient’s hemodynamic status improves.
The duration of perfusion or total cumulative dose cannot be predicted. After hemodynamic stabilization, wean incrementally over time, such as by decreasing doses of epinephrine every 30 minutes over a 12- to 24-hour period.
💊 Dosage Forms and Strengths ▾
3 DOSAGE FORMS AND STRENGTHS Injection solution: 1 mg/mL epinephrine as a sterile solution in a 1 mL glass syringe, marked Epinephrine Injection USP, 1 mg/mL. Injection solution: 1 mg/mL Syringe.
⛔ Contraindications ▾
4 CONTRAINDICATIONS None None
⚠️ Warnings and Cautions ▾
5 WARNINGS AND PRECAUTIONS Monitor patient for acute severe hypertension. (5.1) Avoid extravasation into tissues, which can cause local necrosis. (5.2) Potential for pulmonary edema, which may be fatal.
(5.3) May constrict renal blood vessels and decrease urine formation. (5.4) May induce potentially serious cardiac arrhythmias or aggravate angina pectoris, particularly in patients with underlying heart disease. (5.5) Presence of sulfite in this product should not deter use.
(5.7)
5.1Hypertension When Epinephrine Injection is administered intravenously, titrate the infusion while monitoring vital signs. Invasive arterial blood pressure monitoring and central venous pressure monitoring are recommended. Because of varying response to epinephrine, dangerously high blood pressure may occur [ see Drug Interactions (7) ].
5.2Extravasation and Tissue Necrosis with Intravenous Infusion When Epinephrine Injection is administered intravenously, the infusion site should be checked frequently for free flow. Avoid extravasation of epinephrine into the tissues, to prevent local necrosis. Blanching along the course of the infused vein, sometimes without obvious extravasation, may be attributed to vasa vasorum constriction with increased permeability of the vein wall, permitting some leakage.
This also may progress on rare occasions to superficial slough. Hence, if blanching occurs, consider changing the infusion site at intervals to allow the effects of local vasoconstriction to subside. Antidote for Extravasation Ischemia: To prevent sloughing and necrosis in areas in which extravasation has taken place, infiltrate the area with 10 mL to 15 mL of saline solution containing from 5 mg to 10 mg of phentolamine, an adrenergic blocking agent.
Use a syringe with a fine hypodermic needle, with the solution being infiltrated liberally throughout the area, which is easily identified by its cold, hard, and pallid appearance. Sympathetic blockade with phentolamine causes immediate and conspicuous local hyperemic changes if the area is infiltrated within 12 hours.
5.3Pulmonary Edema When Epinephrine Injection is administered intravenously, there is risk of pulmonary edema because of the peripheral constriction and cardiac stimulation produced. Treatment of pulmonary edema consists of a rapidly acting alpha-adrenergic blocking drug (such as phentolamine mesylate) and respiratory support.
5.4Renal Impairment Intravenously administered epinephrine initially may produce constriction of renal blood vessels and decrease urine formation.
5.5Cardiac Arrhythmias and Ischemia Epinephrine may induce cardiac arrhythmias and angina pectoris in patients, especially patients suffering from coronary artery disease, organic heart disease, cerebrovascular disease, hypertension, or patients who are receiving drugs that sensitize the myocardium [see Adverse Reactions (6) and Drug Interactions (7) ]. Treatment of arrhythmias consists of administration of a beta-adrenergic blocking drug (such as propranolol).
5.6Other Disease Interactions Epinephrine should be administered with caution to patients with hyperthyroidism, Parkinson’s disease, diabetes mellitus, pheochromocytoma, elderly individuals, and pregnant women. Patients with Parkinson’s disease may experience psychomotor agitation or notice a temporary worsening of symptoms. Diabetic patients may experience transient increases in blood sugar.
Despite these concerns, the presence of these conditions is not a contraindication to epinephrine administration in an acute, life-threatening situation.
5.7Allergic Reactions Associated with Sulfite Epinephrine is the preferred treatment for serious allergic or other emergency situations even though this product contains sodium metabisulfite, a sulfite that may in other products cause allergic-type reactions including anaphylactic symptoms or life-threatening or less severe asthmatic episodes in certain susceptible persons. The alternatives to using epinephrine in a life-t…
🤒 Adverse Reactions ▾
6 ADVERSE REACTIONS Most common adverse reactions to systemically administered epinephrine are headache; anxiety; apprehensiveness; restlessness; tremor; weakness; dizziness; sweating; palpitations; pallor; peripheral coldness; nausea/vomiting; and/or respiratory difficulties. Arrhythmias, including fatal ventricular fibrillation, rapid rises in blood pressure producing cerebral hemorrhage, and angina have occurred. To report SUSPECTED ADVERSE REACTIONS, contact BPI Labs, LLC at (727) 471-0850 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
The following adverse reactions associated with the infusion of epinephrine were identified in the literature. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency reliably or to establish a causal relationship to drug exposure. Cardiovascular disorders : tachycardia, supraventricular tachycardia, ventricular arrhythmias, myocardial ischemia, myocardial infarction, limb ischemia, pulmonary edema Gastrointestinal disorders : Nausea, vomiting General disorders and administrative site conditions : Chest pain, extravasation, Metabolic : hypoglycemia, hyperglycemia, insulin resistance, hypokalemia, lactic acidosis Nervous system disorders : Headache, nervousness, paresthesia, tremor, stroke, central nervous system bleeding Psychiatric disorders : Excitability Renal disorders : Renal insufficiency Respiratory : Pulmonary edema, rales Skin and subcutaneous tissue disorders : Diaphoresis, pallor, piloerection, skin blanching, skin necrosis with extravasation
🔄 Drug Interactions ▾
7 DRUG INTERACTIONS Drugs antagonizing pressor effects of epinephrine α-blockers, such as phentolamine Vasodilators, such as nitrates Diuretics Antihypertensives Ergot alkaloids Drugs potentiating pressor effects of epinephrine Sympathomimetics β-blockers, such as propranolol Tricyclic anti-depressants Monoamine oxidase (MAO) inhibitors Catechol-O-methyl transferase (COMT) inhibitors, such as entacapone Clonidine Doxapram Oxytocin Drugs potentiating arrhythmogenic effects of epinephrine Patients who are concomitantly receiving any of the following drugs should be observed carefully for the development of cardiac arrhythmias [see Warnings and Precautions (5.5) and Adverse Reactions (6) ]. β-blockers, such as propranolol Cyclopropane or halogenated hydrocarbon anesthetics, such as halothane Antihistamines Thyroid hormones Diuretics Cardiac glycosides, such as digitalis glycosides Quinidine Drugs potentiating hypokalemic effects of epinephrine Potassium depleting diuretics Corticosteroids Theophylline Epinephrine should not be used to counteract circulatory collapse or hypotension caused by phenothiazines, as a reversal of the pressor effects of epinephrine may result in further lowering of blood pressure.
Epinephrine may antagonize the neuronal blockade produced by guanethidine resulting in decreased antihypertensive effect and requiring increased dosage of the latter. Drugs that counter the pressor effects of epinephrine include alpha blockers, vasodilators such as nitrates, diuretics, antihypertensives, and ergot alkaloids. (7) Drugs that potentiate the effects of epinephrine include sympathomimetics, beta blockers, tricyclic antidepressants, MAO inhibitors, COMT inhibitors, clonidine, doxapram, oxytocin, levothyroxine sodium, and certain antihistamines.
(7) Drugs that increase the arrhythmogenic potential of epinephrine include beta blockers, cyclopropane and halogenated hydrocarbon anesthetics, quinidine, antihistamines, exogenous thyroid hormones, diuretics, and cardiac glycosides. Observe for development of cardiac arrhythmias. (7) Potassium-depleting drugs, including corticosteroids, diuretics, and theophylline, potentiate the hypokalemic effects of epinephrine.
(7)
👥 Use in Specific Populations ▾
8 USE IN SPECIFIC POPULATIONS Pregnancy: May cause fetal harm (8.1) Elderly patients and pregnant women may be at greater risk of developing adverse reactions when epinephrine is administered parenterally. (8.1, 8.5)
8.1Pregnancy Risk Summary Prolonged experience with epinephrine use in pregnant women over several decades, based on published literature, does not identify a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. However, there are risks to the mother and fetus associated with epinephrine use during labor or delivery (see Clinical Considerations ). In animal reproduction studies, epinephrine administered by the subcutaneous route to pregnant rabbits, mice, and hamsters, during the period of organogenesis, resulted in adverse developmental effects (including gastroschisis, embryonic lethality, and delayed skeletal ossification) at doses approximately 2 times the maximum recommended daily intramuscular, subcutaneous, or intravenous dose (see Data ).
The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the United States 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.
Clinical Considerations Disease-associated maternal and/or embryo/fetal risk Hypotension associated with septic shock is a medical emergency in pregnancy which can be fatal if left untreated. Delaying treatment in pregnant women with hypotension associated with septic shock may increase the risk of maternal and fetal morbidity and mortality. Life-sustaining therapy for the pregnant woman should not be withheld due to potential concerns regarding the effects of epinephrine on the fetus.
Labor or Delivery Epinephrine usually inhibits spontaneous or oxytocin-induced contractions of the pregnant human uterus and may delay the second stage of labor. Avoid epinephrine during the second stage of labor. In dosage sufficient to reduce uterine contractions, the drug may cause a prolonged period of uterine atony with hemorrhage.
Avoid epinephrine in obstetrics when maternal blood pressure exceeds 130/80 mmHg. Although epinephrine may improve maternal hypotension associated with septic shock and anaphylaxis, it may result in uterine vasoconstriction, decreased uterine blood flow, and fetal anoxia. Data Animal Data In an embryofetal development study with pregnant rabbits dosed during the period of organogenesis (on days 3 to 5, 6 to 7, or 7 to 9 of gestation), epinephrine caused teratogenic effects (including gastroschisis) at doses approximately 15 times the maximum recommended intramuscular, subcutaneous, or intravenous dose (on a mg/m 2 basis at a maternal subcutaneous dose of 1.2 mg/kg/day for 2 to 3 days).
Animals treated on days 6 to 7 had decreased number of implantations. In an embryofetal development study, pregnant mice were administered epinephrine (0.1 to 10 mg/kg/day) on Gestation Days 6 to 15. Teratogenic effects, embryonic lethality, and delays in skeletal ossification were observed at approximately 3 times the maximum recommended intramuscular, subcutaneous, or intravenous dose (on a mg/m 2 basis at maternal subcutaneous dose of 1 mg/kg/day for 10 days).
These effects were not seen in mice at approximately 2 times the maximum recommended daily intramuscular or subcutaneous dose (on a mg/m 2 basis at a subcutaneous maternal dose of 0.5 mg/kg/day for 10 days). In an embryofetal development study with pregnant hamsters dosed during the period of organogenesis from gestation days 7 to 10, epinephrine produced reductions in litter size and delayed skeletal ossification at doses approximately 2 times the maximum recommended intramuscular, subcutaneous, or intravenous dose (on a mg/m 2 basis at a maternal subcutaneous dose of 0.5 mg/kg/day).
8.2 Lactat…
🆘 Overdosage ▾
10 OVERDOSAGE Overdosage of epinephrine may produce extremely elevated arterial pressure, which may result in cerebrovascular hemorrhage, particularly in elderly patients. Overdosage may also result in pulmonary edema because of peripheral vascular constriction together with cardiac stimulation. Epinephrine overdosage may also cause transient bradycardia followed by tachycardia and these may be accompanied by potentially fatal cardiac arrhythmias.
Premature ventricular contractions may appear within one minute after injection and may be followed by multifocal ventricular tachycardia (prefibrillation rhythm). Subsidence of the ventricular effects may be followed by atrial tachycardia and occasionally by atrioventricular block. Myocardial ischemia and infarction, cardiomyopathy, extreme pallor and coldness of the skin, metabolic acidosis due to elevated blood lactic acid levels, and renal insufficiency and failure have also been reported.
Epinephrine is rapidly inactivated in the body and treatment following overdose is primarily supportive. Treatment of pulmonary edema consists of a rapidly acting alpha-adrenergic blocking drug (such as phentolamine mesylate) and respiratory support. Treatment of arrhythmias consists of administration of a beta-adrenergic blocking drug (such as propranolol).
If necessary, pressor effects may be counteracted by rapidly acting vasodilators (such as nitrites) or alpha-adrenergic blocking drugs. If prolonged hypotension follows such measures, it may be necessary to administer another pressor drug.
🧬 Clinical Pharmacology ▾
12 CLINICAL PHARMACOLOGY
12.1Mechanism of Action Epinephrine acts on both alpha (α)- and beta (β)-adrenergic receptors. The mechanism of the rise in blood pressure is 3-fold: a direct myocardial stimulation that increases the strength of ventricular contraction (positive inotropic action), an increased heart rate (positive chronotropic action), and peripheral vasoconstriction.
12.2Pharmacodynamics Intravenous use for hypotension associated with septic shock Following intravenous administration of epinephrine, increases in systolic blood pressure and heart rate are observed. Decreases in systemic vascular resistance and diastolic blood pressure are observed at low doses of epinephrine because of β 2 -mediated vasodilation, but are overtaken by α 1 -mediated peripheral vasoconstriction at higher doses leading to increase in diastolic blood pressure. The onset of blood pressure increase following an intravenous dose of epinephrine is < 5 minutes and the time to offset blood pressure response occurs within 20 min.
Most vascular beds are constricted including renal, splanchnic, mucosal and skin.
12.3Pharmacokinetics When administered parenterally, epinephrine has a rapid onset and short duration of action. Following intravenous injection, epinephrine is rapidly cleared from the plasma with an effective half-life of < 5 min. A pharmacokinetic steady state following continuous intravenous infusion is achieved within 10-15 min.
In patients with septic shock, epinephrine displays dose-proportional pharmacokinetics in the infusion dose range of 0.03 to 1.7 mcg/kg/min. Epinephrine is extensively metabolized with only a small amount excreted unchanged. Epinephrine is rapidly degraded to vanillylmandelic acid, an inactive metabolite, by monoamine oxidase and catechol-O-methyltransferase that are abundantly expressed in the liver, kidneys and other extraneuronal tissues.
The tissues with the highest contribution to removal of circulating exogenous epinephrine are the liver (32%), kidneys (25%), skeletal muscle (20%), and mesenteric organs (12%). Special Populations Elderly In a pharmacokinetic study of 45-minute epinephrine infusions given to healthy men aged 20 to 25 years and healthy men aged 60 to 65 years, the mean plasma metabolic clearance rate of epinephrine at steady state was greater among the older men (144.8 versus 78 mL/kg/min for a 14.3 ng/kg/min infusion). Body Weight Body weight has been found to influence epinephrine pharmacokinetics.
Higher body weight was associated with a higher plasma epinephrine clearance and a lower concentration plateau.
📦 How Supplied / Storage and Handling ▾
16 HOW SUPPLIED/STORAGE AND HANDLING Epinephrine 1 mg/mL Injection is a clear, colorless solution available as follows : NDC 54288-117-10 10 Single-Dose Prefilled Syringes Containing 1 mL Epinephrine is light sensitive. Protect from light until ready to use. Do not refrigerate.
Protect from freezing. Store at room temperature, between 20°C to 25°C (68°F to 77°F). (See USP Controlled Room Temperature.) Protect from alkalis and oxidizing agents.
Revised: December 2024 Manufactured by: BPI Labs LLC 12393 Belcher Rd S, Suite 450, Largo, FL 33773 LI11I R-2412
📋 Description ▾
11 DESCRIPTION Epinephrine Injection USP is a clear, colorless, sterile solution containing 1 mg/mL epinephrine, packaged as a 1 mL solution in a 1 mL single dose syringe. Each mL of Epinephrine Injection, USP solution contains 1 mg epinephrine, 8.6 mg sodium chloride, 1.5 mg sodium metabisulfite, q.s hydrochloric acid as a dissolution and pH adjustment, and water for injection. The pH range is 2.2-5.0.
Solution must be diluted prior to intravenous use. Epinephrine is a sympathomimetic catecholamine. The chemical name of epinephrine is: 1,2- Benzenediol, 4-[(1R)-1-hydroxy-2-(methylamino)ethyl]-, or (-)-3,4-Dihydroxy- α -[2- (methylamino)ethyl]benzyl alcohol.
The chemical structure of epinephrine is: The molecular weight of epinephrine is 183.2. Epinephrine solution deteriorates rapidly on exposure to air or light, turning pink from oxidation to adrenochrome and brown from the formation of melanin. structure