Insulin Lispro

See Full Prescribing Information for important preparation and administration instructions. ( 2.1 , 2.2 , 2.3 , 2.4 ) Rotate injection sites to reduce risk of lipodystrophy and localized cutaneous amyloidosis. ( 2.2 ) Subcutaneous injection ( 2.2 ): Administer ADMELOG by subcutaneous injection into the abdominal wall, thigh, upper arm, or buttocks within 15 minutes before a meal or immediately after a meal. Rotate injection sites to reduce risk of lipodystrophy and localized cutaneous amyloidosis. Continuous subcutaneous infusion (Insulin Pump) ( 2.2 ): Refer to the insulin infusion pump user manual to see if ADMELOG can be used. Use in accordance with the insulin pump instructions for use. Administer ADMELOG by continuous subcutaneous infusion using an insulin pump in a region recommended in the instructions from the pump manufacturer. Rotate infusion sites to reduce risk of lipodystrophy and localized cutaneous amyloidosis. Do not mix with other insulins or diluents in the pump. Intravenous Infusion: Administer ADMELOG by intravenous infusion ONLY after dilution and under medical supervision. ( 2.2 ) The dosage of ADMELOG must be individualized based on the route of administration and the patient's metabolic needs, blood glucose monitoring results and glycemic control goal. ( 2.3 )

2.1 Important Preparation and Administration Instructions Always check insulin labels before administration [see Warnings and Precautions (5.4) ] . Inspect ADMELOG visually before use. It should appear clear and colorless. Do not use ADMELOG if particulate matter or coloration is seen. Use ADMELOG SoloStar prefilled pen with caution in patients with visual impairment who may rely on audible clicks to dial their dose. Do NOT mix ADMELOG with other insulins when administering using a continuous subcutaneous infusion pump.

2.2 Preparation and Administration Instructions for the Approved Routes of Administration Subcutaneous Injection Administer the dose of ADMELOG subcutaneously within fifteen minutes before a meal or immediately after a meal into the abdominal wall, thigh, upper arm, or buttocks. Rotate injection site within the same region from one injection to the next to reduce the risk of lipodystrophy and localized cutaneous amyloidosis. Do not inject into areas of lipodystrophy or localized cutaneous amyloidosis [see Warnings and Precautions (5.2) , Adverse Reactions (6) ] . During changes to a patient's insulin regimen, increase the frequency of blood glucose monitoring [see Warnings and Precautions (5.2) ] . ADMELOG administered by subcutaneous injection should generally be used in regimens with intermediate or long-acting insulin. The ADMELOG SoloStar prefilled pen dials in 1-unit increments. Prior to subcutaneous use, ADMELOG may be diluted with sterile 0.9% Sodium Chloride Injection. Dilute one-part ADMELOG to one-part 0.9% Sodium Chloride Injection to yield a concentration one-half that of ADMELOG (equivalent to U-50). If diluted ADMELOG is not used immediately, refrigerate at 2°C to 8°C (36°F to 46°F) for no more than 24 hours or store at room temperature up to 30°C (86°F) for 4 hours. Discard the unused diluted ADEMLOG after 24 hours if refrigerated or after 4 hours if stored at room temperature. Continuous Subcutaneous Infusion (Insulin Pump) Refer to the continuous subcutaneous insulin infusion pump user manual to see if ADMELOG can be used with the insulin pump. Use ADMELOG in accordance with the insulin pump system's instructions for use. Administer ADMELOG by continuous subcutaneous infusion in a region recommended in the instructions from the pump manufacturer. Rotate infusion sites within the same region to reduce the risk of lipodystrophy and localized cutaneous amyloidosis. Do not inject into areas of lipodystrophy or localized cutaneous amyloidosis [see Warnings and Precautions (5.2) , Adverse Reactions (6) ] . Train patients using continuous subcutaneous insulin infusion therapy to administer insulin by injection and have alternate insulin therapy available in case of insulin pump failure [see Warnings and Precautions (5.8) ]. During changes to a patient's insulin regimen, increase the frequency of blood glucose monitoring [see Warnings and Precautions (5.2) ] . Change ADMELOG in the pump reservoir at least every 7 days or according to the pump user manual, whichever is shorter. Change the infusion sets and the infusion set insertion site according to the manufacturer's user manual. Do NOT dilute or mix ADMELOG when administering by continuous subcutaneous infusion. Do NOT expose ADMELOG in the pump reservoir to temperatures greater than 98.6°F (37°C). Intravenous Administration Administer ADMELOG intravenously ONLY under medical supervision [see Warnings and Precautions (5.3 , 5.6) ] . Dilute ADMELOG to concentrations from 0.1 unit/mL to 1 unit/mL using 0.9% Sodium Chloride Injection, USP [see How Supplied/Storage and Handling (16.2) ] . Closely monitor of blood glucose and potassium levels to avoid hypoglycemia and hypokalemia [see Warnings and Precautions (5.3 , 5.6) ].

2.3 Dosage Recommendations Individualize and adjust the dosage of ADMELOG based on the route of administration, the patient's metabolic needs, blood glucose monitoring results, and glycemic control goal. Dosage modifications may be needed with changes in physical activity, changes in meal patterns (i.e., macronutrient content or timing of food intake), changes in renal or hepatic function, or during acute illness [see Warnings and Precautions (5.2 , 5.3) and Use in Specific Populations (8.6 , 8.7) ] . When switching from another insulin lispro product to ADMELOG, the dose of ADMELOG should be the same as the other insulin lispro product [see Warnings and Precautions (5.2) ]. When switching from other insulins to ADMELOG, the ADMELOG dosage may need to be adjusted [see Warnings and Precautions (5.2) ] .

2.4 Dosage Adjustment for Drug Interactions Dosage modification may be needed when ADMELOG is coadministered with certain drugs [see Drug Interactions (7) ]. Do NOT mix ADMELOG with any other insulin.

5 WARNINGS AND PRECAUTIONS Never share an ADMELOG SoloStar disposable prefilled pen or syringe between patients, even if the needle is changed. ( 5.1 ) Hyperglycemia or Hypoglycemia with Changes in Insulin Regimen: Make changes to a patient's insulin regimen (e.g., insulin strength, manufacturer, type, injection site or method of administration) under close medical supervision with increased frequency of blood glucose monitoring. ( 5.2 ) Hypoglycemia: May be life-threatening. Monitor blood glucose and increase monitoring frequency with changes to insulin dosage, use of glucose lowering medications, meal pattern, physical activity; in patients with renal or hepatic impairment; and in patients with hypoglycemia unawareness. ( 5.3 , 6 , 7 , 8.6 , 8.7 ) Hypoglycemia Due to Medication Errors: Accidental mix-ups between insulin products can occur. Instruct patients to check insulin labels before injection. ( 5.4 ) Hypersensitivity Reactions: May be life-threatening. Discontinue ADMELOG, monitor and treat if indicated. ( 5.5 ) Hypokalemia: May be life-threatening. Monitor potassium levels in patients at risk of hypokalemia and treat if indicated. ( 5.6 ) Fluid Retention and Heart Failure with Concomitant Use of Thiazolidinediones (TZDs): Observe for signs and symptoms of heart failure; consider dosage reduction or discontinuation if heart failure occurs. ( 5.7 ) Hyperglycemia and Ketoacidosis Due to Insulin Pump Device Malfunction: Monitor glucose and administer ADMELOG by subcutaneous injection if pump malfunction occurs. ( 5.8 )

5.1 Never Share an ADMELOG SoloStar Pen or Syringe Between Patients ADMELOG SoloStar prefilled pen must never be shared between patients, even if the needle is changed. Patients using ADMELOG vials must never share needles or syringes with another person. Sharing poses a risk for transmission of blood-borne pathogens.

5.2 Hyperglycemia or Hypoglycemia with Changes in Insulin Regimen Changes in an insulin regimen (e.g., insulin strength, manufacturer, type, injection site or method of administration) may affect glycemic control and predispose to hypoglycemia [see Warnings and Precautions (5.3) ] or hyperglycemia. Repeated insulin injections into areas of lipodystrophy or localized cutaneous amyloidosis have been reported to result in hyperglycemia; and a sudden change in the injection site (to unaffected area) has been reported to result in hypoglycemia [see Adverse Reactions (6) ] . Make any changes to a patient's insulin regimen under close medical supervision with increased frequency of blood glucose monitoring. Advise patients who have repeatedly injected into areas of lipodystrophy or localized cutaneous amyloidosis to change the injection site to unaffected areas and closely monitor for hypoglycemia. For patients with type 2 diabetes, dosage adjustments of concomitant anti-diabetic products may be needed.

5.3 Hypoglycemia Hypoglycemia is the most common adverse reaction associated with insulins, including ADMELOG. Severe hypoglycemia can cause seizures, may be life-threatening, or cause death. Hypoglycemia can impair concentration ability and reaction time; this may place an individual and others at risk in situations where these abilities are important (e.g., driving or operating other machinery). Hypoglycemia can happen suddenly, and symptoms may differ in each individual and change over time in the same individual. Symptomatic awareness of hypoglycemia may be less pronounced in patients with longstanding diabetes, in patients with diabetic nerve disease, in patients using medications that block the sympathetic nervous system (e.g., beta-blockers) [see Drug Interactions (7) ] , or in patients who experience recurrent hypoglycemia. Risk Factors for Hypoglycemia The risk of hypoglycemia after an injection is related to the duration of action of the insulin and, in general, is highest when the glucose lowering effect of the insulin is maximal. As with all insulins, the glucose lowering effect time course of ADMELOG may vary in different individuals or at different times in the same individual and depends on many conditions, including the area of injection as well as the injection site blood supply and temperature [see Clinical Pharmacology (12.2) ] . Other factors which may increase the risk of hypoglycemia include changes in meal pattern (e.g., macronutrient content or timing of meals), changes in level of physical activity, or changes to co-administered medication [see Drug Interactions (7) ] . Patients with renal or hepatic impairment may be at higher risk of hypoglycemia [see Use in Specific Populations (8.6 , 8.7) ] . Risk Mitigation Strategies for Hypoglycemia Patients and caregivers must be educated to recognize and manage hypoglycemia. Self-monitoring of blood glucose plays an essential role in the prevention and management of hypoglycemia. In patients at higher risk for hypoglycemia and patients who have reduced symptomatic awareness of hypoglycemia, increased frequency of blood glucose monitoring is recommended.

5.4 Hypoglycemia Due to Medication Errors Accidental mix-ups between insulin products have been reported. To avoid medication errors between ADMELOG and other insulins, instruct patients to always check the insulin label before each injection.

5.5 Hypersensitivity Reactions Severe, life-threatening, generalized allergy, including anaphylaxis, can occur with insulins, including ADMELOG. If hypersensitivity reactions occur, discontinue ADMELOG; treat per standard of care and monitor until symptoms and signs resolve [see Adverse Reactions (6.1) ] . ADMELOG is contraindicated in patients who have had hypersensitivity reactions to insulin lispro or any of the excipients in ADMELOG [see Contraindications (4) ] .

5.6 Hypokalemia All insulins, including ADMELOG, cause a shift in potassium from the extracellular to intracellular space, possibly leading to hypokalemia. Untreated hypokalemia may cause respiratory paralysis, ventricular arrhythmia, and death. Monitor potassium levels in patients at risk for hypokalemia if indicated (e.g., patients using potassium-lowering medications, patients taking medications sensitive to serum potassium concentrations).

5.7 Fluid Retention and Heart Failure with Concomitant Use of PPAR-gamma Agonists Thiazolidinediones (TZDs), which are peroxisome proliferator-activated receptor (PPAR)-gamma agonists, can cause dose-related fluid retention, particularly when used in combination with insulin. Fluid retention may lead to or exacerbate heart failure. Patients treated with insulin, including ADMELOG, and a PPAR-gamma agonist should be observed for signs and symptoms of heart failure. If heart failure develops, it should be managed according to current standards of care, and discontinuation or dose reduction of the PPAR-gamma agonist must be considered.

5.8 Hyperglycemia and Ketoacidosis Due to Insulin Pump Device Malfunction Malfunction of the insulin pump or insulin infusion set or insulin degradation can rapidly lead to hyperglycemia and ketoacidosis. Prompt identification and correction of the cause of hyperglycemia or ketosis is necessary. Interim subcutaneous injections with ADMELOG may be required. Patients using continuous subcutaneous insulin infusion pump therapy must be trained to administer insulin by injection and have alternate insulin therapy available in case of pump failure [see How Supplied/Storage and Handling (16.2) and Patient Counseling Information (17) ] .

The following adverse reactions are discussed elsewhere: Hypoglycemia [see Warnings and Precautions (5.3) ] Hypoglycemia Due to Medication Errors [see Warnings and Precautions (5.4) ] Hypersensitivity Reactions [see Warnings and Precautions (5.5) ] Hypokalemia [see Warnings and Precautions (5.6) ] Adverse reactions associated with ADMELOG include hypoglycemia, allergic reactions, injection site reactions, lipodystrophy, pruritus, and rash. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact sanofi-aventis at 1-800-633-1610 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Adverse Reactions with Subcutaneous Injections of ADMELOG Two clinical trials with ADMELOG were conducted: one in patients with type 1 diabetes and one in patients with type 2 diabetes [see Clinical Studies (14) ] . The data in Table 1 reflect the exposure of 252 patients with type 1 diabetes to ADMELOG with mean exposure duration of 49 weeks. The type 1 diabetes population had the following characteristics: Mean age was 43 years and mean duration of diabetes was 20 years. Fifty-nine percent were male, 80% were White, 6% were Black or African American and 7% were Hispanic. At baseline, the mean eGFR was 90 mL/min/1.73 m 2 and 49% of patients had eGFR ≥90 mL/min/1.73 m 2 . The mean BMI was 26 kg/m 2 . The mean HbA1c at baseline was 8.07%. Two hundred fifty-three patients with type 2 diabetes were exposed to ADMELOG with mean exposure duration of 25 weeks. The type 2 diabetes population had the following characteristics: Mean age was 62 years and mean duration of diabetes was 17 years. Fifty-four percent were male, 90% were White, 6% were Black or African American and 17% were Hispanic. At baseline, the mean eGFR was 77 mL/min/1.73 m 2 and 27% of patients had eGFR ≥90 mL/min/1.73 m 2 . The mean BMI was 32 kg/m 2 . The mean HbA1c at baseline was 7.99%. Common adverse reactions were defined as reactions that occurred in ≥5% of the population studied. Common adverse reactions (other than hypoglycemia) during a clinical trial in patients with type 1 diabetes mellitus are listed in Table 1. In a 26-week clinical trial in patients with type 2 diabetes mellitus, no adverse reactions (other than hypoglycemia) occurred in ≥5% of ADMELOG-treated patients (n=253) were observed. Table 1: Adverse Reactions that Occurred in ≥5% of ADMELOG-Treated Patients with Type 1 Diabetes in a 52-Week Trial ADMELOG + Insulin Glargine (100 units/mL), % (n=252) Nasopharyngitis 13% Upper respiratory tract infection 6% Severe Hypoglycemia Hypoglycemia is the most commonly observed adverse reaction in patients using insulin, including ADMELOG [see Warnings and Precautions (5.3) ] . The rates of reported hypoglycemia depend on the definition of hypoglycemia used, diabetes type, insulin dose, intensity of glucose control, background therapies, and other intrinsic and extrinsic patient factors. For these reasons, comparing rates of hypoglycemia in clinical trials for ADMELOG with the incidence of hypoglycemia for other products may be misleading and also, may not be representative of hypoglycemia rates that will occur in clinical practice. In the ADMELOG trials, severe hypoglycemia was defined as an event requiring assistance of another person to actively administer carbohydrate, glucagon, or other resuscitative actions. The incidence of severe hypoglycemia in patients receiving ADMELOG with type 1 diabetes mellitus and type 2 diabetes mellitus was 13.5% at 52 weeks and 2.4% at 26 weeks, respectively [see Clinical Studies (14) ] . Adverse Reactions Associated with Insulin Initiation and Intensification of Glucose Control Intensification or rapid improvement in glucose control has been associated with a transitory, reversible ophthalmologic refraction disorder, worsening of diabetic retinopathy, and acute painful peripheral neuropathy. However, long-term glycemic control decreases the risk of diabetic retinopathy and neuropathy. Lipodystrophy Long-term use of insulin, including ADMELOG, can cause lipodystrophy at the site of repeated insulin injections or infusion. Lipodystrophy includes lipohypertrophy (thickening of adipose tissue) and lipoatrophy (thinning of adipose tissue) and may affect insulin absorption [see Dosage and Administration (2.2) ] . Weight Gain Weight gain can occur with insulins, including ADMELOG, and has been attributed to the anabolic effects of insulin and the decrease in glucosuria. Peripheral Edema Insulins, including ADMELOG, may cause sodium retention and edema, particularly if previously poor metabolic control is improved by intensified insulin therapy. Adverse Reactions with Continuous Subcutaneous Insulin Infusion (CSII) of ADMELOG In a randomized, open-label crossover study in adult patients with type 1 diabetes treated over two 4-week periods, the incidence of infusion set occlusions (defined as failure to correct hyperglycemia [plasma glucose ≥300 mg/dL] by insulin bolus via insulin pump) in ADMELOG-treated patients (n=25) was evaluated. Infusion set occlusions were reported by 24% of patients. In a randomized, 16-week, open-label, parallel design study of pediatric patients with type 1 diabetes, adverse reactions related to infusion site-related reactions for another insulin lispro product, 100 units/mL, occurred in 21% of patients. The most frequently reported infusion site-related reactions were infusion site erythema and infusion site reaction. Allergic Reactions Local Allergy As with any insulin therapy, patients taking ADMELOG may experience redness, swelling, or itching at the site of the injection. These minor reactions usually resolve in a few days to a few weeks, but in some occasions may require discontinuation of ADMELOG. In some instances, these reactions may be related to factors other than insulin, such as irritants in a skin cleansing agent or poor injection technique. Systemic Allergy Severe, life-threatening, generalized allergy, including anaphylaxis, may occur with any insulin, including ADMELOG. Generalized allergy to insulin may cause whole body rash (including pruritus), dyspnea, wheezing, hypotension, tachycardia, or diaphoresis. Localized reactions and generalized myalgias have been reported with injected metacresol, which is an excipient in ADMELOG [see Contraindications (4) ] .

6.2 Immunogenicity As with all therapeutic proteins, there is potential for immunogenicity. The detection of antibody formation is highly dependent on the sensitivity and specificity of the assay. Additionally, the observed incidence of antibody (including neutralizing antibody) positivity in an assay may be influenced by several factors including assay methodology, sample handling, timing of sample collection, concomitant medication, and underlying disease. For these reasons, comparison of the incidence of antibodies to ADMELOG in the studies described below with the incidence of antibodies in other studies or to other insulin products may be misleading. In a 52-week study of ADMELOG in type 1 diabetes patients, 49.4% were positive at baseline and 22.6% had treatment-emergent ADA (i.e., either new ADA, or increase in titer of at least 4-fold). In a 26-week study of ADMELOG in type 2 diabetes patients, 26.4% were positive at baseline and 18.8% had treatment-emergent ADA (i.e., either new ADA, or increase in titer of at least 4-fold).

6.3 Postmarketing Experience The following additional adverse reactions have been identified during post approval use of another insulin lispro product, 100 units/mL. 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 drug exposure. Medication errors in which other insulins have been accidentally substituted for another insulin lispro product, 100 units/mL, have been identified during post approval use. Localized cutaneous amyloidosis at the injection site has occurred. Hyperglycemia has been reported with repeated insulin injections into areas of localized cutaneous amyloidosis; hypoglycemia has been reported with a sudden change to an unaffected injection site.

8.1 Pregnancy Risk Summary Published studies with another insulin lispro product used during pregnancy have not reported an association between insulin lispro and the induction of major birth defects, miscarriage, or adverse maternal or fetal outcomes [see Data ] . There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy [see Clinical Considerations ] . Pregnant rats and rabbits were exposed to another insulin lispro product in animal reproduction studies during organogenesis. Fetal growth retardation was observed in offspring of rats exposed to insulin lispro at a dose approximately 3 times the human subcutaneous dose of 1.0 unit/kg/day. No adverse effects on embryo-fetal development were observed in offspring of rabbits exposed to insulin lispro at doses up to approximately 0.24 times the human subcutaneous dose of 1.0 unit/kg/day [see Data ] . The estimated background risk of major birth defects is 6%–10% in women with pregestational diabetes with a HbA1c >7% and has been reported to be as high as 20%–25% in women with a HbA1c >10%. The estimated background risk of miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2%–4% and 15%–20%, respectively. Clinical Considerations Disease-associated maternal and/or embryo-fetal risk Poorly controlled diabetes in pregnancy increases the maternal risk for diabetic ketoacidosis, preeclampsia, spontaneous abortions, preterm delivery, and delivery complications. Poorly controlled diabetes increases the fetal risk for major birth defects, stillbirth, and macrosomia related morbidity. Data Human data Published data from retrospective studies and meta-analyses do not report an association with another insulin lispro product and major birth defects, miscarriage, or adverse maternal or fetal outcomes when insulin lispro is used during pregnancy. However, these studies cannot definitely establish or exclude the absence of any risk because of methodological limitations including small sample size, selection bias, confounding by unmeasured factors, and some lacking comparator groups. Animal data In a combined fertility and embryo-fetal development study with another insulin lispro product, female rats were given subcutaneous insulin lispro injections of 5 and 20 units/kg/day (0.8 and 3 times the human subcutaneous dose of 1 unit/kg/day, based on units/body surface area, respectively) from 2 weeks prior to cohabitation through Gestation Day 19. There were no adverse effects on female fertility, implantation, or fetal viability and morphology. However, fetal growth retardation was observed at the 20 units/kg/day dose as indicated by decreased fetal weight and an increased incidence of fetal runts/litter. In an embryo-fetal development study in pregnant rabbits with another insulin lispro product, insulin lispro doses of 0.1, 0.25, and 0.75 unit/kg/day (0.03, 0.08, and 0.24 times the human subcutaneous dose of 1 unit/kg/day, based on units/body surface area, respectively) were injected subcutaneously on Gestation Days 7 through 19. There were no adverse effects on fetal viability, weight, and morphology at any dose.

8.2 Lactation Risk Summary Available data from published literature suggest that exogenous human insulin products, including insulin lispro, are transferred into human milk. There are no adverse reactions reported in breastfed infants in the literature. There are no data on the effects of exogenous human insulin products, including insulin lispro, on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for ADMELOG and any potential adverse effects on the breastfed child from ADMELOG or from the underlying maternal condition.

8.4 Pediatric Use The safety and effectiveness of ADMELOG to improve glycemic control have been established in pediatric patients with diabetes mellitus. Use of ADMELOG for this indication is supported by evidence from an adequate and well-controlled study with another insulin lispro product, 100 units/ml, in 60 pediatric patients 3 years of age and older with type 1 diabetes mellitus and studies in adult patients with diabetes mellitus [see Clinical Studies (14) ] .

8.5 Geriatric Use Of the total number of patients (n=2,834) in eight clinical studies of another insulin lispro product, 100 units/mL, 12% (n=338) were 65 years of age or over. The majority of these patients had type 2 diabetes. HbA1c values and hypoglycemia rates did not differ by age. Of the total number of patients (n=1,011) in clinical studies of ADMELOG or another insulin lispro product, 100 units/mL, 26.5% (n=268) were 65 years of age or over. The majority of these patients had type 2 diabetes. HbA1c values and hypoglycemia rates did not differ by age. Pharmacokinetic/pharmacodynamic studies to assess the effect of age on the onset of ADMELOG action have not been performed.

8.6 Renal Impairment Patients with renal impairment may be at increased risk of hypoglycemia and may require more frequent ADMELOG dose adjustment and more frequent blood glucose monitoring [see Clinical Pharmacology (12.3) ] .

8.7 Hepatic Impairment Patients with hepatic impairment may be at increased risk of hypoglycemia and may require more frequent ADMELOG dose adjustment and more frequent blood glucose monitoring [see Clinical Pharmacology (12.3) ] .

12.1 Mechanism of Action Regulation of glucose metabolism is the primary activity of insulins and insulin analogs, including insulin lispro products. Insulins lower blood glucose by stimulating peripheral glucose uptake by skeletal muscle and fat, and by inhibiting hepatic glucose production. Insulins inhibit lipolysis and proteolysis and enhance protein synthesis.

12.2 Pharmacodynamics Pharmacodynamics of ADMELOG After Subcutaneous Injection The pharmacodynamic profile of a single 0.3 unit/kg dose of ADMELOG administered subcutaneously was evaluated in a euglycemic clamp study enrolling 30 patients with type 1 diabetes. In this study, the mean (SD) time to maximum effect of ADMELOG (measured by the peak rate of glucose infusion) was approximately 2.1 (0.8) hours. The mean (SD) area under the glucose infusion rate curves (measure of overall pharmacodynamic effect) and mean (SD) maximum glucose infusion rate were 1953.5 (547.3) mg/kg and 9.97 (2.37) mg/min/kg, respectively (see Figure 1 ). Figure 1: Mean Smoothed Glucose Infusion Rate Body Weight Standardized after Subcutaneous Injection of ADMELOG (0.3 unit/kg) in Patients with Type 1 Diabetes The time course of action of insulin and insulin analogs, including insulin lispro products, may vary considerably in different individuals or within the same individual. The rate of insulin absorption and, consequently, the onset of activity are known to be affected by the site of injection, exercise, and other variables [see Warnings and Precautions (5.2) ] . Figure 1 Pharmacodynamics of AMELOG after Intravenous Administration The glucose lowering effect of intravenous administration of another insulin lispro product, 100 units/mL, was tested in 21 patients with type 1 diabetes. For the study, the patients' usual doses of insulin were held, and blood glucose concentrations were allowed to reach a stable range of 200 to 260 mg/dL during a one to three-hour run-in phase. The run-in phase was followed by a 6-hour assessment phase. During the assessment phase, patients received intravenous infusion of another insulin lispro product, 100 units/mL, at an initial infusion rate of 0.5 units/hour. The infusion rate could be adjusted at regular timed intervals to achieve and maintain blood glucose concentrations between 100 to 160 mg/dL. The mean blood glucose levels during the assessment phase for patients on another insulin lispro product, 100 units/mL, therapy are summarized below in Table 3. All patients achieved the targeted glucose range at some point during the 6-hour assessment phase. At the endpoint, blood glucose was within the target range (100 to 160 mg/dL) for 17 of 20 patients treated with another insulin lispro product, 100 units/mL. The average time (±SE) required to attain near normoglycemia was 129 ± 14 minutes for another insulin lispro product, 100 units/mL. Table 3: Mean Blood Glucose Concentrations (mg/dL) During Intravenous Infusions of Another Insulin Lispro Product, 100 units/mL in Patients with Type 1 Diabetes Time from Start of Infusion (minutes) Mean Blood Glucose (mg/dL) Intravenous Results shown as mean ± SD. 0 224 ± 16 30 205 ± 21 60 195 ± 20 120 165 ± 26 180 140 ± 26 240 123 ± 20 300 120 ± 27 360 122 ± 25 12.3 Pharmacokinetics Absorption The pharmacokinetic profile of a single 0.3 unit/kg dose of ADMELOG administered subcutaneously was evaluated in a study enrolling 30 patients with type 1 diabetes. In this study, the mean observed area under the plasma insulin lispro concentration-time curve from time zero to infinity and peak plasma insulin lispro concentration were 12800 pg∙hr/mL and 5070 pg/mL, respectively. The median time to maximum plasma insulin lispro concentration was 0.83 hours after injection (see Figure 2 ). Figure 2: Mean Plasma Concentrations of ADMELOG after a Single Subcutaneous Administration of ADMELOG (0.3 unit/kg) in Patients with Type 1 Diabetes The absolute bioavailability of another insulin lispro product, 100 units/mL, after subcutaneous injection ranges from 55% to 77% with doses between 0.1 to 0.2 unit/kg, inclusive. Figure 2 Distribution When administered intravenously as bolus injections of 0.1 and 0.2 unit/kg dose in two separate groups of healthy subjects, the mean volume of distribution of another insulin lispro product, 100 units/mL, appeared to decrease with increase in dose (1.55 and 0.72 L/kg, respectively). Elimination Metabolism Human metabolism studies have not been conducted. However, animal studies indicate that the metabolism of another insulin lispro product, 100 units/mL, is identical to that of regular human insulin. Excretion When administered intravenously, another insulin lispro product, 100 units/mL demonstrated dose-dependent clearance, with a mean clearance of 21.0 mL/min/kg (0.1 unit/kg dose), and 9.6 mL/min/kg (0.2 unit/kg dose). Another insulin lispro product, 100 units/mL, demonstrated a mean t 1/2 of 0.85 hours (51 minutes) and 0.92 hours (55 minutes), respectively for 0.1 unit/kg and 0.2 unit/kg doses. Specific Populations The effects of age, gender, race, obesity, pregnancy, or smoking on the pharmacokinetics of ADMELOG have not been studied. Patients with Renal Impairment Type 2 diabetic patients with varying degrees of renal impairment showed no difference in pharmacokinetics of another insulin lispro product, 100 units/mL. However, the sensitivity of the patients to insulin did change, with an increased response to insulin as the renal function declined. Some studies with human insulin have shown increased circulating levels of insulin in patients with renal impairment [see Use in Specific Populations (8.6) ] . Patients with Hepatic Impairment Type 2 diabetic patients with impaired hepatic function showed no effect on the pharmacokinetics of another insulin lispro product, 100 units/mL, as compared to patients with no hepatic dysfunction. However, some studies with human insulin have shown increased circulating levels of insulin in patients with liver failure [see Use in Specific Populations (8.7) ] .