Lidocaine Hydrochloride and Epinephrine

1 INDICATIONS AND USAGE Lidocaine Hydrochloride and Epinephrine Injection is indicated in adult and pediatric patients for the production of local or regional anesthesia or analgesia for surgery, dental, and oral surgery procedures, diagnostic and therapeutic procedures, and for obstetrical procedures. Specific concentrations and presentations of Lidocaine Hydrochloride and Epinephrine Injection are recommended for each type of block indicated to produce local or regional anesthesia or analgesia [see Dosage and Administration (2.2) ] . Lidocaine Hydrochloride and Epinephrine Injection is a combination of lidocaine, an amide local anesthetic, and epinephrine, an alpha and beta adrenergic agonist. Lidocaine Hydrochloride and Epinephrine Injection is indicated in adult and pediatric patients for the production of local or regional anesthesia or analgesia for surgery, dental, and oral surgery procedures, diagnostic and therapeutic procedures, and for obstetrical procedures. For each type of block indicated to produce local or regional anesthesia or analgesia, specific concentrations and presentations are recommended. ( 1 , 2.2 )

2 DOSAGE AND ADMINISTRATION See Full Prescribing Information for recommended dosages and administration information for adult and pediatric patients ( 2 ) 2.1 Important Dosage and Administration Information Lidocaine Hydrochloride and Epinephrine Injection is not recommended for intrathecal use. Avoid use of Lidocaine Hydrochloride and Epinephrine solutions containing antimicrobial preservatives (i.e., multiple-dose vials) for epidural or caudal anesthesia [see Warnings and Precautions (5.3) ] . Discard unused portions of solution not containing preservatives, i.e., those supplied in single-dose vials, following initial use. Visually inspect this product for particulate matter and discoloration prior to administration whenever solution and container permit. Lidocaine Hydrochloride and Epinephrine Injections are clear, colorless to slightly yellow solutions. Do not administer solutions which are discolored or contain particulate matter. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration whenever the solution and container permit. Solutions which are discolored (e.g., pinkish or darker than slightly yellow) or which contain particulate matter or precipitate should not be administered. Mixing or the prior or intercurrent use of any other local anesthetic with Lidocaine Hydrochloride and Epinephrine Injection is not recommended because of insufficient data on the clinical use of such mixtures. Administration Precautions Lidocaine Hydrochloride and Epinephrine Injection is to be administered in carefully adjusted dosages by or under the supervision of experienced clinicians who are well versed in the diagnosis and management of dose-related toxicity and other acute emergencies which might arise from the block to be employed. Use Lidocaine Hydrochloride and Epinephrine Injection only if the following are immediately available: oxygen, cardiopulmonary resuscitative equipment and drugs, and the personnel resources needed for proper management of toxic reactions and related emergencies [see Warnings and Precautions (5.1) , Adverse Reactions (6) , Overdosage (10) ] . The toxic effects of local anesthetics are additive. Monitor for neurologic and cardiovascular effects related to local anesthetic systemic toxicity when additional local anesthetics are administered with Lidocaine Hydrochloride and Epinephrine Injection [see Warnings and Precautions (5.1) , Drug Interactions (7.1) , Overdosage (10) ] . Aspirate for blood or cerebrospinal fluid (where applicable) prior to injecting Lidocaine Hydrochloride and Epinephrine Injection, both the initial dose and all subsequent doses, to avoid intravascular or intrathecal injection. However, a negative aspiration for blood or cerebrospinal fluid does not ensure against an intravascular or intrathecal injection [see Warnings and Precautions (5.7) ] . Avoid rapid injection of a large volume of Lidocaine Hydrochloride and Epinephrine Injection and use fractional (incremental) doses when feasible. During major regional nerve blocks, such as those of the brachial plexus or lower extremity, the patient should have an indwelling intravenous catheter to assure adequate intravenous access. The lowest dosage of Lidocaine Hydrochloride and Epinephrine Injection that results in effective anesthesia should be used to avoid high plasma levels and serious adverse reactions. Perform careful and constant monitoring of cardiovascular and respiratory (adequacy of oxygenation and ventilation) vital signs and the patient’s level of consciousness after each local anesthetic injection. Use Lidocaine Hydrochloride and Epinephrine Injection in carefully restricted quantities in areas of the body supplied by end arteries or having otherwise compromised blood supply such as digits, nose, external ear, or penis [see Warnings and Precautions (5.10) ] . 2.2 Recommended Concentrations and Dosages of Lidocaine Hydrochloride and Epinephrine Injection/Lidocaine H…

5 WARNINGS AND PRECAUTIONS Dose-Related Toxicity : Monitor cardiovascular and respiratory vital signs and patient’s state of consciousness after injection of Lidocaine Hydrochloride and Epinephrine. ( 5.1 ) Methemoglobinemia : Cases of methemoglobinemia have been reported in association with local anesthetics use. See full prescribing information for more details on managing these risks. ( 5.2 ) Chondrolysis with Intra-Articular Infusion : Avoid intra-articular infusions as there have been post-marketing reports of chondrolysis in patients receiving such infusion. ( 5.4 ) Allergic-Type Reactions to Sulfites in Lidocaine Hydrochloride and Epinephrine Injection and Anaphylactic Reactions : Lidocaine Hydrochloride and Epinephrine Injection contains sodium metabisulfite, a sulfite that may cause allergic-type reactions including anaphylactic symptoms and life-threatening or less severe asthmatic episodes in certain susceptible people. ( 5.6 ) Risk of Systemic Toxicities with Unintended Intravascular or Intrathecal Injection : Unintended intravascular or intrathecal injection may be associated with systemic toxicities, including CNS or cardiorespiratory depression and coma, progression ultimately to respiratory arrest. Aspirate for blood or cerebrospinal fluid (where applicable) prior to each dose and consider using a test dose of Lidocaine Hydrochloride and Epinephrine. ( 5.7 ) 5.1 Dose-Related Toxicity The safety and effectiveness of Lidocaine Hydrochloride and Epinephrine Injection depend on proper dosage, correct technique, adequate precautions, and readiness for emergencies. Careful and constant monitoring of cardiovascular and respiratory (adequacy of ventilation) vital signs and the patient's state of consciousness should be performed after injection of Lidocaine Hydrochloride and Epinephrine Injection solutions. Possible early warning signs of central nervous system (CNS) toxicity are restlessness, anxiety, incoherent speech, lightheadedness, numbness and tingling of the mouth and lips, metallic taste, tinnitus, dizziness, blurred vision, tremors, twitching, CNS depression, or drowsiness. Delay in proper management of dose-related toxicity, underventilation from any cause, and/or altered sensitivity may lead to the development of acidosis, cardiac arrest, and, possibly, death. During major regional nerve blocks, such as those of the brachial plexus or lower extremity, the patient should have an indwelling intravenous catheter to assure adequate intravenous access. Use the lowest dosage of Lidocaine Hydrochloride and Epinephrine Injection that results in effective anesthesia to avoid high plasma levels and serious adverse effects. Avoid rapid injection of a large volume of Lidocaine Hydrochloride and Epinephrine Injection solution and administer fractional (incremental) doses when feasible. Injection of repeated doses of Lidocaine Hydrochloride and Epinephrine Injection may cause significant increases in plasma levels with each repeated dose due to slow accumulation of the drug or its metabolites, or to slow metabolic degradation. Tolerance to elevated blood levels varies with the status of the patient. Debilitated, elderly patients and acutely ill patients should be given reduced doses commensurate with their age and physical status. 5.2 Methemoglobinemia Cases of methemoglobinemia have been reported in association with local anesthetic use. Although all patients are at risk for methemoglobinemia, patients with glucose-6-phosphate dehydrogenase deficiency, congenital or idiopathic methemoglobinemia, cardiac or pulmonary compromise, infants under 6 months of age, and concurrent exposure to oxidizing agents or their metabolites are more susceptible to developing clinical manifestations of the condition [see Drug Interactions (7.5)]. If local anesthetics must be used in these patients, close monitoring for symptoms and signs of methemoglobinemia is recommended. Signs of methemoglobinemia may occur immediately or may be delayed…

4 CONTRAINDICATIONS Lidocaine Hydrochloride and Epinephrine Injections are contraindicated in patients with a known hypersensitivity to lidocaine or to any local anesthetics of the amide-type or to other components of Lidocaine Hydrochloride and Epinephrine Injections. Known hypersensitivity to any local anesthetic agent of the amide-type or to other components of Lidocaine Hydrochloride and Epinephrine Injection. ( 4 )

7 DRUG INTERACTIONS Local Anesthetics : The toxic effects of local anesthetics are additive. Monitor for neurologic and cardiovascular effects when additional local anesthetics are administered. ( 7.1 ) Monoamine Oxidase Inhibitors and Tricyclic Antidepressants : Administration of Lidocaine Hydrochloride and Epinephrine Injection to patients receiving monoamine oxidase inhibitors or tricyclic antidepressants may produce severe, prolonged hypertension Concurrent use of these agents should generally be avoided. ( 5.5 , 7.2 ) Ergot-type Oxytocic drugs : Concurrent administration of Lidocaine Hydrochloride and Epinephrine Injection and ergot-type oxytocic drugs may cause severe, persistent hypertension or cerebrovascular accidents. ( 5.5 , 7.3 ) Nonselective Beta-Adrenergic Antagonists : Administration of Lidocaine Hydrochloride and Epinephrine Injection in patients receiving nonselective beta-adrenergic antagonist may cause severe hypertension and bradycardia. Concurrent use of these agents should generally be avoided. ( 5.5 , 7.4 ) Drugs Associated with Methemoglobinemia : Patients are at increased risk of developing methemoglobinemia when concurrently exposed to nitrates, nitrites, local anesthetics, antineoplastic agents, antibiotics, antimalarials, anticonvulsants and other drugs. ( 7.5 ) Potent Inhalation Anesthetics : Serious dose-related cardiac arrhythmias may occur if preparations containing epinephrine are used in patients during or following the administration of potent inhalation anesthetics. ( 5.11 , 7.6 ) 7.1 Local Anesthetics The toxic effects of local anesthetics are additive. If coadministration of other local anesthetics with Lidocaine Hydrochloride and Epinephrine Injection cannot be avoided, monitor patients for neurologic and cardiovascular effects related to local anesthetic systemic toxicity [see Warnings and Precautions (5.1) ] . 7.2 Monoamine Oxidase Inhibitors and Tricyclic Antidepressants The administration of Lidocaine Hydrochloride and Epinephrine Injection to patients receiving monoamine oxidase inhibitors or tricyclic antidepressants may produce severe, prolonged hypertension. Concurrent use of these agents should generally be avoided. In situations when concurrent therapy is necessary, careful monitoring of the patient’s hemodynamic status is essential [see Warnings and Precautions (5.5) ] . 7.3 Ergot-Type Oxytocic Drugs Concurrent administration of vasopressor drugs (for the treatment of hypotension related to obstetric blocks) and ergot-type oxytocic drugs may cause severe, persistent hypertension or cerebrovascular accidents. Avoid use of Lidocaine Hydrochloride and Epinephrine Injection concomitantly with ergot-type oxytocic drugs [see Warnings and Precautions (5.5) ] . 7.4 Nonselective Beta-Adrenergic Antagonists Administration of Lidocaine Hydrochloride and Epinephrine Injection in patients receiving nonselective beta-adrenergic antagonists may cause severe hypertension and bradycardia. Concurrent use of these agents should generally be avoided. In situations when concurrent therapy is necessary, careful monitoring of the patient's blood pressure and heart rate is essential [see Warnings and Precautions (5.5) ] . 7.5 Drugs Associated with Methemoglobinemia Patients that are administered local anesthetics may be at increased risk of developing methemoglobinemia when concurrently exposed to the following oxidizing agents: Class Examples Nitrates/Nitrites nitroglycerin, nitroprusside, nitric oxide, nitrous oxide Local anesthetics articaine, benzocaine, bupivacaine, lidocaine, mepivacaine, prilocaine, procaine, ropivacaine, tetracaine Antineoplastic agents cyclophosphamide, flutamide, rasburicase, ifosfamide, hydroxyurea Antibiotics dapsone, sulfonamides, nitrofurantoin, para- aminosalicylic acid Antimalarials chloroquine, primaquine Anticonvulsants phenytoin, sodium valproate, phenobarbital Other drugs acetaminophen, metoclopramide, quinine, sulfasalazine 7.6 Potent Inhalation Anesthetics Seriou…

8.1 Pregnancy Risk Summary Available published data and decades of clinical use with lidocaine hydrochloride in pregnant women have not identified any drug-associated risk for major birth defects, miscarriage, or other adverse maternal or fetal outcomes. Local anesthetics may cause varying degrees of toxicity to the mother and fetus and adverse reactions include alterations of the central nervous system, peripheral vascular tone and cardiac function (see Clinical Considerations ) . In a published animal reproduction study, pregnant rats administered lidocaine by continuous subcutaneous infusion at a dose approximately 9.6 times the maximum recommended human dose (MRHD) of 500 mg in lidocaine hydrochloride during the period of organogenesis resulted in lower fetal body weights [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 defects, loss, or other adverse outcomes. In the United States general population, the estimated background risks of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Clinical Considerations Maternal adverse reactions Maternal hypotension has resulted from regional anesthesia. Local anesthetics produce vasodilation by blocking sympathetic nerves. Therefore, during treatment of systemic toxicity, maternal hypotension or fetal bradycardia following regional block, the parturient should be maintained in the left lateral decubitus position if possible or manual displacement of the uterus off the great vessels be accomplished. Elevating the patient’s legs will also help prevent decreases in blood pressure. The fetal heart rate also should be monitored continuously, and electronic fetal monitoring is highly advisable. Labor or delivery Local anesthetics rapidly cross the placenta, and when used for epidural, paracervical, pudendal or caudal block anesthesia, can cause varying degrees of maternal, fetal and neonatal toxicity [see Clinical Pharmacology (12.3) ] . The incidence and degree of toxicity depend upon the procedure performed, the type and amount of drug used, and the technique of drug administration. Adverse reactions in the parturient, fetus and neonate involve alterations of the central nervous system, peripheral vascular tone and cardiac function. However, dosage recommendations for spinal anesthesia are much lower than dosage recommendations for other major blocks. Spinal anesthesia may alter the forces of parturition through changes in uterine contractility or maternal expulsive efforts. Spinal anesthesia has also been reported to prolong the second stage of labor by removing the parturient’s reflex urge to bear down or by interfering with motor function. The use of obstetrical anesthesia may increase the need for forceps assistance. The use of some local anesthetic drug products during labor and delivery may be followed by diminished muscle strength and tone for the first day or two of life. Data Animal Data Reproduction studies have been performed in rats at doses up to 6.6 times the human dose and have revealed no evidence of harm to the fetus caused by lidocaine hydrochloride. In a published study, lidocaine administered to pregnant rats by continuous subcutaneous infusion during the period of organogenesis at 100, 250, and 500 mg/kg/day, did not produce any structural abnormalities, but did result in lower fetal weights at 500 mg/kg/day dose (approximately 9.6 times the maximum recommended human dose [MRHD] of 500 mg lidocaine on a mg/m 2 basis) in the absence of maternal toxicity.

6 ADVERSE REACTIONS The following clinically significant adverse reactions have been reported and described in the Warnings and Precautions section of the labeling: Dose-Related Toxicity [see Warnings and Precautions (5.1) ] Methemoglobinemia [see Warnings and Precautions (5.2) ] Chondrolysis with Intra-Articular Infusion [see Warnings and Precautions (5.4) ] Severe, Persistent Hypertension, Cerebrovascular Accidents, and Bradycardia Due to Drug Interactions [see Warnings and Precautions (5.5) ] Allergic-Type Reactions [see Warnings and Precautions (5.6) ] Systemic Toxicities with Unintended Intravascular or Intrathecal Injection [see Warnings and Precautions (5.7) ] Respiratory Arrest Following Retrobulbar Block [see Warnings and Precautions (5.14) ] The following adverse reactions from voluntary reports or clinical studies have been reported with lidocaine or lidocaine and epinephrine. Because many of these reactions were reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Adverse reactions to Lidocaine Hydrochloride are characteristic of those associated with other amide-type local anesthetic. A major cause of adverse reactions to this group of drugs is excessive plasma levels, which may be due to overdosage, unintentional intravascular injection, or slow metabolic degradation. The most commonly encountered acute adverse reactions that demand immediate counter measures were related to the CNS and the cardiovascular system. These adverse reactions were generally dose-related and due to high plasma levels which may have resulted from overdosage, rapid absorption from the injection site, diminished tolerance, or from unintentional intravascular injection of the local anesthetic solution. In addition to systemic dose-related toxicity, unintentional intrathecal injection of drug during the intended performance of caudal or lumbar epidural block or nerve blocks near the vertebral column (especially in the head and neck region) has resulted in underventilation or apnea (“Total or High Spinal”). Also, hypertension due to loss of sympathetic tone and respiratory paralysis or underventilation due to cephalad extension of the motor level of anesthesia have occurred. This has led to secondary cardiac arrest when untreated. When used for dental injections, paresthesia of the lips, tongue, and oral tissues have been reported. Persistent paresthesia lasting weeks to months and, in some instances, lasting greater than one year, have also been reported. Nervous System Disorders Adverse reactions were characterized by excitation and/or depression of the central nervous system and included lightheadedness, nervousness, apprehension, euphoria, confusion, dizziness, drowsiness, tinnitus, blurred or double vision, vomiting, sensations of heat, cold or numbness, twitching, tremors, convulsions, unconsciousness, respiratory depression and arrest. The incidences of adverse reactions associated with the use of local anesthetics may be related to the total dose of local anesthetic administered and are also dependent upon the particular drug used, the route of administration and the physical status of the patient. In a prospective review of 10,440 patients who received lidocaine hydrochloride for spinal anesthesia, the incidences of adverse reactions were reported to be about 3 percent each for positional headaches, hypotension and backache; 2 percent for shivering; and less than 1 percent each for peripheral nerve symptoms, nausea, respiratory inadequacy and double vision. Persistent motor, sensory and/or autonomic (sphincter control) deficit of some lower spinal segments with slow recovery (several months) or incomplete recovery have been reported in rare instances when caudal or lumbar epidural block has been attempted. Backache and headache have also been noted following use of these anesthetic procedures. There have been repor…