EPINEPHRINE

RECENT MAJOR CHANGES Warnings and Precautions ( 5.8 ) 5/2016

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 ) • For emergency treatment of allergic reactions (Type 1), including anaphylaxis. ( 1.2 ) • For induction and maintenance of mydriasis during intraocular surgery. ( 1.3 ) 1.1 Hypotension 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. 1.2 Anaphylaxis Emergency treatment of allergic reactions (Type I), including anaphylaxis, which may result from allergic reactions to insect stings, biting insects, foods, drugs, sera, diagnostic testing substances and other allergens, as well as idiopathic anaphylaxis or exercise-induced anaphylaxis. The signs and symptoms associated with anaphylaxis include flushing, apprehension, syncope, tachycardia, thready or unobtainable pulse associated with hypotension, convulsions, vomiting, diarrhea and abdominal cramps, involuntary voiding, airway swelling, laryngospasm, bronchospasm, pruritus, urticaria or angioedema, swelling of the eyelids, lips, and tongue. 1.3 Induction and Maintenance of Mydriasis during Intraocular Surgery Induction and maintenance of mydriasis during intraocular surgery.

2 DOSAGE AND ADMINISTRATION • Hypotension associated with septic shock: Dilute epinephrine in dextrose solution prior to infusion. ( 2.2 ) Infuse epinephrine into a large vein. ( 2.2 ) Intravenous infusion rate of 0.05 mcg/kg/min to 2 mcg/kg/min, titrated to achieve desired mean arterial pressure ( 2.2 ) Wean gradually. ( 2.2 ) • Anaphylaxis: Adults and Children 30 kg (66 lbs) or more: 0.3 to 0.5 mg (0.3 to 0.5 mL) intramuscularly or subcutaneously into anterolateral aspect of the thigh every 5 to 10 minutes as necessary. ( 2.3 ) Children 30 kg (66 lbs) or less: 0.01 mg/kg (0.01 mL/kg), up to 0.3 mg (0.3 mL), intramuscularly or subcutaneously into anterolateral aspect of the thigh every 5 to 10 minutes as necessary. ( 2.3 ) • Intraocular surgery: Dilute 1 mL with 100 to 1000 mL of an ophthalmic irrigation fluid, for ophthalmic irrigation or intracameral injection. ( 2.4 ) 2.1 General 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. 2.2 Hypotension associated with Septic Shock Dilute epinephrine in 5 percent dextrose solution or 5 percent dextrose and sodium chloride solution. These dextrose containing fluids provide protection against significant loss of potency by oxidation. Administration in saline solution 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 ampule to 1,000 mL of a 5 percent 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 - 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. 2.3 Anaphylaxis Inject epinephrine intramuscularly or subcutaneously into the anterolateral aspect of the thigh, through clothing if necessary. When administering to a child, to minimize the risk of injection related injury, hold the leg firmly in place and limit movement prior to and during an injection. The injection may be repeated every 5 to 10 minutes as necessary. For intramuscular administration, use a needle long enough (at least 1/2 inch to 5/8 inch) to ensure the injection is administered into the muscle. Monitor the patient clinically for the sev …

3 DOSAGE FORMS AND STRENGTHS Injection: Epinephrine Injection, USP is a sterile, nonpyrogenic, clear and colorless solution supplied as 1 mg/mL in a single-dose clear glass vial and as 30 mg/30 mL (1 mg/mL) in a multiple-dose amber glass vial. Injection: 1 mg/mL, single-dose vial and 30 mg/30 mL (1 mg/mL), multiple-dose vial ( 3 )

4 CONTRAINDICATIONS None. None. ( 4 )

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. ( 6.1 , 6.2 ) 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 6.1 Adverse Reactions associated with Epinephrine Infusion (for Hypotension associated with Septic Shock) 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 6.2 Adverse Reactions associated with Intramuscular or Subcutaneous Use (for Anaphylaxis) Common adverse reactions to systemically administered epinephrine include anxiety, apprehensiveness, restlessness, tremor, weakness, dizziness, sweating, palpitations, pallor, nausea and vomiting, headache, and respiratory difficulties. These symptoms occur in some persons receiving therapeutic doses of epinephrine, but are more likely to occur in patients with heart disease, hypertension, or hyperthyroidism [see Warnings and Precautions (5.9) ]. Due to the lack of randomized, controlled clinical trials of epinephrine for the treatment of anaphylaxis, the true incidence of adverse reactions associated with the systemic use of epinephrine is difficult to determine. Adverse reactions reported in observational trials, case reports, and studies are listed below by body system: Cardiovascular: angina, arrhythmias, hypertension, pallor, palpitations, tachyarrhythmia, tachycardia, vasoconstriction, and ventricular ectopy. Angina may occur in patients with coronary artery disease [see Warnings and Precautions (5.6) ]. Arrhythmias, including fatal ventricular fibrillation, have occurred, particularly in patients with underlying organic heart disease or patients receiving drugs that sensitize the heart to arrhythmias [see Warnings and Precautions (5.6) ]. Rapid rises in blood pressure associated with epinephrine use have produced cerebral hemorrhage, particularly in elderly patients with cardiovascular disease [see Warnings and Precautions (5.6) ]. Respiratory: respiratory difficulties. Neurological: dizziness, disorientation, excitability, headache, impaired memory, lightheadedness, nervousness, panic, psychomotor agitation, sleepiness, tingling, tremor, and weakness. Psychiatric: anxiety, apprehensiveness, restlessness. Gastrointestinal: nausea, vomiting. Skin: sweating. Other: Patients with Parkinson’s disease may experience psychomotor agitation or a temporary worsening of symptoms [see Warnings and Precautions (5.9) ]. Diabetic patients may experience transient increases in blood sugar [see Warnings and Precautions (5.9) ]. Accidental injection into the digits, hands or feet may result in loss of blood flow to the affected area [see Warnings and Precautions (5.3) ]. …

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 (5.6) 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 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 (5.6) 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)

8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy 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 and delivery (see Clincial 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 During pregnancy, anaphylaxis can be catastrophic and can lead to hypoxicischemic encephalopathy and permanent central nervous system damage or death in the mother and, more commonly, in the fetus or neonate. The prevalence of anaphylaxis occurring during pregnancy is reported to be approximately 3 cases per 100,000 deliveries. Management of anaphylaxis during pregnancy is similar to managment in the general population. Epinephrine is the first line-medication of choice for treatment of anaphylaxis; it should be used in the same manner in pregnant and non-pregnant patients. In conjunction with the administration of epinephrine, the patient should seek immediate medical or hospital care. Hypotension associated with septic shock is a medical emergency in pregnancy which can be fatal if left untreated. Delaying treatment in pregnany women with hypotension associated with septic shock may increase the risk of maternal and fetal morbidity and mortality. Life-sustaining therapy for the pregnany 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 pregnany 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/m2 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 in …

12.1 Mechanism of Action Anaphylaxis Epinephrine acts on both alpha- and beta-adrenergic receptors. Through its action on alpha-adrenergic receptors, epinephrine lessens the vasodilation and increased vascular permeability that occurs during anaphylaxis, which can lead to loss of intravascular fluid volume and hypotension. Through its action on beta-adrenergic receptors, epinephrine causes bronchial smooth muscle relaxation and helps alleviate bronchospasm, wheezing and dyspnea that may occur during anaphylaxis. Epinephrine also alleviates pruritus, urticaria, and angioedema. It may also relieve gastrointestinal and genitourinary symptoms associated with anaphylaxis because of its relaxer effects on the smooth muscle of the stomach, intestine, uterus and urinary bladder. Hypotension Epinephrine acts on both alpha and beta-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.

11 DESCRIPTION Epinephrine is an alpha and beta adrenergic agonist. The chemical name of epinephrine is: 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]-, ( R )- or (−)-3,4-Dihydroxy-α-[(methylamino)methyl]benzyl alcohol. It is a white to practically white, odorless, microcrystalline powder or granules. The structural formula of epinephrine is: The molecular weight of epinephrine is 183.20 and molecular formula is C 9 H 13 NO 3 . It is very slightly soluble in water and in alcohol. Epinephrine Injection, USP is a clear, colorless, sterile solution containing 1 mg/mL epinephrine, packaged as 1 mL of solution in a single-dose clear glass vial and 30 mL of solution in a multiple-dose amber glass vial. The pH range of the solution is 3.0 to 4.0. Epinephrine Injection, USP, 1 mg/mL single-dose vial: Each mL contains 1 mg epinephrine, USP as the active ingredient and the following inactive ingredients: citric acid monohydrate 2.6 mg, edetate disodium (as dihydrate) 0.2 mg, hydrochloric acid for pH adjustment, L-methionine 1.5 mg, sodium chloride 7.59 mg, sodium citrate dihydrate 1 mg, sodium metabisulfite 0.05 mg, and water for injection q.s. Epinephrine Injection, USP, 30 mg/30 mL (1 mg/mL) multiple-dose vial: Each mL contains 1 mg epinephrine, USP as the active ingredient and the following inactive ingredients: chlorobutanol hemihydrate 5.52 mg as preservative, citric acid monohydrate 2.6 mg, edetate disodium (as dihydrate) 0.2 mg, hydrochloric acid for pH adjustment, L-methionine 1.5 mg, sodium chloride 6.39 mg, sodium citrate dihydrate 1 mg, sodium metabisulfite 0.05 mg, and water for injection q.s. Solution must be diluted prior to intravenous use. Epinephrine solution deteriorates rapidly on exposure to air or light, turning pink from oxidation to adrenochrome and brown from the formation of melanin. structural-formula-epinephrine-1

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 with epinephrine 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 epinephrine associated arrhythmias consists of administration of a beta-adrenergic blocking drug (such as propranolol). If necessary, pressor effects may be counteracted by rapidly acting vasodilators or alpha-adrenergic blocking drugs. If prolonged hypotension follows such measures, it may be necessary to administer another pressor drug.

16 HOW SUPPLIED/STORAGE AND HANDLING Epinephrine Injection USP, 1 mg/mL is a sterile solution containing 1 mg/1 mL epinephrine in a 2 mL clear glass ampule. Supplied in a box of 10 single-use ampules (NDC 54288-103-10). Epinephrine is light sensitive. Protect from light until ready to use. Do not refrigerate. Protect from freezing. Store at room temperature, between 20° to 25°C (68° to 77°F). (See USP Controlled Room Temperature.) Protect from alkalis and oxidizing agents. Inspect visually for particulate matter and discoloration prior to administration. Do not use the solution if it is colored or cloudy, or if it contains particulate matter. Product repackaged by: Henry Schein, Inc., Bastian, VA 24314 From Original Manufacturer/Distributor's NDC and Unit of Sale To Henry Schein Repackaged Product NDC and Unit of Sale Total Strength/Total Volume (Concentration) per unit NDC 54288-103-10 10 2 mL single-use ampules in a box NDC 0404-9857-01 1 2 mL single-use ampule in a bag (Vial bears NDC 54288-103-10) 1 mg/1 mL