Label: AFREZZA- insulin human powder, metered
AFREZZA- insulin human kit

These highlights do not include all the information needed to use AFREZZA ® safely and effectively. See full prescribing information for AFREZZA.

AFREZZA ® (insulin human) inhalation powder, for oral inhalation use
Initial U.S. Approval: 2014

WARNING: RISK OF ACUTE BRONCHOSPASM IN PATIENTS WITH CHRONIC LUNG DISEASE

See full prescribing information for complete boxed warning.

INDICATIONS AND USAGE

AFREZZA ® is a rapid acting inhaled human insulin indicated to improve glycemic control in adult patients with diabetes mellitus. (1)

Limitations of Use:

DOSAGE AND ADMINISTRATION

DOSAGE FORMS AND STRENGTHS

Inhalation powder in single-use cartridges of: 4 units, 8 units, or 12 units (3)

CONTRAINDICATIONS

WARNINGS AND PRECAUTIONS

ADVERSE REACTIONS

The most common adverse reactions associated with AFREZZA (2% or greater incidence) are hypoglycemia, cough, and throat pain or irritation (6)

To report SUSPECTED ADVERSE REACTIONS, contact MannKind at 1-877-323-8505 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

DRUG INTERACTIONS

See 17 for PATIENT COUNSELING INFORMATION and Medication Guide.

FULL PRESCRIBING INFORMATION: CONTENTS*

WARNING: RISK OF ACUTE BRONCHOSPASM IN PATIENTS WITH CHRONIC LUNG DISEASE

1 INDICATIONS AND USAGE

2 DOSAGE AND ADMINISTRATION

2.1 Lung Function Assessment Prior to Administration

2.2 Important Administration and Discard Instructions

2.3 Recommended Starting Mealtime Dosage

2.4 Mealtime Dosage Modification

2.5 Dosage Modifications for Drug Interactions

2.6 Administration Instructions

3 DOSAGE FORMS AND STRENGTHS

4 CONTRAINDICATIONS

5 Warnings and Precautions

5.1 Acute Bronchospasm in Patients with Chronic Lung Disease

5.2 Hypoglycemia or Hyperglycemia with Changes in Insulin Regimen

5.3 Hypoglycemia

5.4 Decline in Pulmonary Function

5.5 Lung Cancer

5.6 Diabetic Ketoacidosis

5.7 Hypersensitivity Reactions

5.8 Hypokalemia

5.9 Fluid Retention and Heart Failure with Concomitant Use of PPAR-gamma Agonists

6 ADVERSE REACTIONS

6.1 Clinical Trials Experience

6.2 Postmarketing Experience

7 DRUG INTERACTIONS

7.1 Drugs That May Increase the Risk of Hypoglycemia

7.2 Drugs That May Decrease the Blood Glucose Lowering Effect of AFREZZA

7.3 Drugs That May Increase or Decrease the Blood Glucose Lowering Effect of AFREZZA

7.4 Drugs That May Affect Hypoglycemia Signs and Symptoms

8 USE IN SPECIFIC POPULATIONS

8.1 Pregnancy

8.2 Lactation

8.4 Pediatric Use

8.5 Geriatric Use

8.6 Hepatic Impairment

8.7 Renal Impairment

10 OVERDOSAGE

11 DESCRIPTION

11.1 AFREZZA Cartridges

11.2 AFREZZA Inhaler

12 CLINICAL PHARMACOLOGY

12.1 Mechanism of Action

12.2 Pharmacodynamics

12.3 Pharmacokinetics

12.6 Immunogenicity

13 NONCLINICAL TOXICOLOGY

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

14 CLINICAL STUDIES

14.1 Overview of Clinical Studies of AFREZZA in Adults for Diabetes Mellitus

14.2 Adults with Type 1 Diabetes

14.3 Adults with Type 2 Diabetes

16 HOW SUPPLIED/STORAGE AND HANDLING

17 PATIENT COUNSELING INFORMATION

* Sections or subsections omitted from the full prescribing information are not listed.

WARNING: RISK OF ACUTE BRONCHOSPASM IN PATIENTS WITH CHRONIC LUNG DISEASE

2.1 Lung Function Assessment Prior to Administration

AFREZZA is contraindicated in patients with chronic lung disease because of the risk of acute bronchospasm in these patients. Before initiating AFREZZA, perform a medical history, physical examination and spirometry (FEV 1 ) in all patients to identify potential lung disease [see Contraindications (4) and Warnings and Precautions (5.1)].

2.2 Important Administration and Discard Instructions

Only administer AFREZZA via oral inhalation using the AFREZZA Inhaler. Administer AFREZZA at the beginning of each meal. Administer AFREZZA using a single inhalation per cartridge (if the dose is greater than the contents of a single cartridge, more than one cartridge is needed) [see Dosage and Administration (2.3)]. For additional administration instructions on how to use the AFREZZA Inhaler [see Dosage and Administration (2.6)] and see the Instructions for Use. The AFREZZA Inhaler can be used for up to 15 days from the date of first use. After 15 days of use, the inhaler must be discarded and replaced with a new inhaler.

2.3 Recommended Starting Mealtime Dosage

For patients using subcutaneous, pre-mixed insulin :

For AFREZZA doses exceeding the contents of a single cartridge at mealtime, inhalations from more than one cartridge are necessary. To achieve the required total mealtime dose, use a combination of 4 unit, 8 unit, and 12 unit cartridges. Examples of cartridge combinations for doses of up to 24 units are shown in Figure 1. For doses above 24 units, use combinations of different multiple cartridges.

Figure 1. Mealtime AFREZZA Starting Dose Conversion Table

Figure 1

2.4 Mealtime Dosage Modification

2.5 Dosage Modifications for Drug Interactions

Dosage modification may be needed when:

2.6 Administration Instructions

Refer patients to the Instructions for Use for detailed instructions and visuals on how to prepare, administer, and store AFREZZA; use the AFREZZA cartridges; and use the AFREZZA inhaler. Critical administration instructions are as follows:

Inhalation Powder: single-use cartridges containing 4 units, 8 units or 12 units of insulin human as white powder to be administered via oral inhalation with the AFREZZA inhaler only [see How Supplied/Storage and Handling (16)] .

5.1 Acute Bronchospasm in Patients with Chronic Lung Disease

Because of the risk of acute bronchospasm, AFREZZA is contraindicated in patients with chronic lung disease such as asthma or COPD [see Contraindications (4)] . Before initiating therapy with AFREZZA, evaluate all patients with a medical history, physical examination, and spirometry (FEV 1 ) to identify potential underlying lung disease. Acute bronchospasm has been observed in AFREZZA-treated patients with asthma and COPD. In a study of patients with asthma whose bronchodilators were temporarily withheld for assessment, bronchoconstriction and wheezing following AFREZZA dosing was reported in 29% (5 out of 17) and 0% (0 out of 13) of patients with and without a diagnosis of asthma, respectively. In this study, a mean decline in FEV 1 of 400 mL was observed 15 minutes after a single AFREZZA dose in patients with asthma. In a subset study of patients with COPD (n=8), a mean decline in FEV 1 of 200 mL was observed 18 minutes after a single AFREZZA dose.

5.2 Hypoglycemia or Hyperglycemia with Changes in Insulin Regimen

Glucose monitoring is essential for patients receiving insulin therapy. Changes in insulin strength, manufacturer, type, or method of administration may affect glycemic control and predispose to hypoglycemia [see Warnings and Precautions (5.3)] or hyperglycemia. These changes should be made under close medical supervision and the frequency of blood glucose monitoring should be increased. For patients with type 2 diabetes, dosage modifications of concomitant oral antidiabetic treatment may be needed [see Drug Interactions (7.1, 7.2, and 7.3)] .

5.3 Hypoglycemia

Glucose monitoring is essential for patients receiving insulin therapy. Hypoglycemia is the most common adverse reaction associated with insulins, including AFREZZA. 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). The timing of hypoglycemia usually reflects the time-action profile of the administered insulin formulation. AFREZZA has a distinct time action profile [see Clinical Pharmacology (12)] , which impacts the timing of hypoglycemia. Hypoglycemia can happen suddenly, and symptoms may differ across patients and change over time in the same patient. Symptomatic awareness of hypoglycemia may be less pronounced in patients with longstanding diabetes, in patients with diabetic nerve disease, in patients using certain medications [see Drug Interactions (7.4)] , or in patients who experience recurrent hypoglycemia. 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 should 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 Decline in Pulmonary Function

AFREZZA causes a decline in pulmonary function over time as measured by FEV 1 . In clinical trials excluding patients with chronic lung disease and lasting up to 2 years, AFREZZA-treated patients experienced a small [40 mL (95% CI: -80, -1)] but greater FEV 1 decline than comparator-treated patients. The FEV 1 decline was noted within the first 3 months, and persisted for the entire duration of therapy (up to 2 years of observation). In this population, the annual rate of FEV 1 decline did not appear to worsen with increased duration of use. The effects of AFREZZA on pulmonary function for treatment duration longer than 2 years has not been established. There are insufficient data in long term studies to draw conclusions regarding reversal of the effect on FEV 1 after discontinuation of AFREZZA. The observed changes in FEV 1 were similar in patients with type 1 and type 2 diabetes. Assess pulmonary function (e.g., spirometry) at baseline, after the first 6 months of therapy, and annually thereafter, even in the absence of pulmonary symptoms. In patients who have a decline of ≥ 20% in FEV 1 from baseline, consider discontinuing AFREZZA. Consider more frequent monitoring of pulmonary function in patients with pulmonary symptoms such as wheezing, bronchospasm, breathing difficulties, or persistent or recurring cough. If symptoms persist, discontinue AFREZZA [see Adverse Reactions (6)] .

5.5 Lung Cancer

In clinical trials, two cases of lung cancer, one in controlled trials and one in uncontrolled trials (2 cases in 2,750 patient-years of exposure), were observed in patients exposed to AFREZZA while no cases of lung cancer were observed in patients exposed to comparators (0 cases in 2,169 patient-years of exposure). In both cases, a prior history of heavy tobacco use was identified as a risk factor for lung cancer. Two additional cases of lung cancer (squamous cell and lung blastoma) occurred in non-smokers exposed to AFREZZA and were reported by investigators after clinical trial completion. These data are insufficient to determine whether AFREZZA has an effect on lung or respiratory tract tumors. In patients with active lung cancer, a prior history of lung cancer, or in patients at risk for lung cancer, consider whether the benefits of AFREZZA use outweigh this potential risk.

5.6 Diabetic Ketoacidosis

In clinical trials enrolling patients with type 1 diabetes, diabetic ketoacidosis (DKA) was more common in AFREZZA-treated patients (0.43%; n=13) than in comparator-treated patients (0.14%; n=3). Patients with type 1 diabetes should always use AFREZZA in combination with basal insulin. In patients at risk for DKA, such as those with an acute illness or infection, increase the frequency of glucose monitoring and consider discontinuing AFREZZA and giving insulin using an alternate route of administration.

5.7 Hypersensitivity Reactions

Severe, life-threatening, generalized allergy, including anaphylaxis, can occur with insulin products, including AFREZZA. If hypersensitivity reactions occur, discontinue AFREZZA, treat per standard of care and monitor until symptoms and signs resolve [see Adverse Reactions (6)] . AFREZZA is contraindicated in patients who have had hypersensitivity reactions to AFREZZA or any of its excipients [see Contraindications (4)] .

5.8 Hypokalemia

All insulin products, including AFREZZA, 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 AFREZZA-treated patients at risk for hypokalemia (e.g., patients using potassium-lowering medications, patients taking medications sensitive to serum potassium concentrations and patients receiving intravenously administered insulin).

5.9 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 AFREZZA, 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 should be considered.

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.

The data described below reflect exposure of 3,017 patients to AFREZZA and include 1,026 patients with type 1 diabetes and 1,991 patients with type 2 diabetes. The mean exposure duration was 8.2 months for patients with type 1 diabetes and those with type 2 diabetes. In the overall population:

AFREZZA was studied in placebo and active-controlled trials (n = 3 and n = 10, respectively).

The mean age of the population was 50.2 years and 20 patients were older than 75 years of age; 51% of the population were males; 83% were White, 5% were Black or African American, and 2% were Asian; 10% were Hispanic. At baseline, the type 1 diabetes population had diabetes for an average of 16.6 years and had a mean HbA1c of 8.3%, and the type 2 diabetes population had diabetes for an average of 10.7 years and had a mean HbA1c of 8.8%. At baseline, 33% of the population reported peripheral neuropathy, 32% reported retinopathy and 20% had a history of cardiovascular disease.

Table 1 shows the frequency of common adverse reactions, excluding hypoglycemia, associated with the use of AFREZZA in the pool of controlled trials in type 2 diabetes patients. These adverse reactions were not present at baseline, occurred more commonly on AFREZZA than on placebo and/or comparator and occurred in at least 2% of patients treated with AFREZZA.

*Carrier particle without insulin was used as placebo [see Description (11.1)] .

Table 2 shows the frequency of common adverse reactions, excluding hypoglycemia, associated with the use of AFREZZA in the pool of active-controlled trials in type 1 diabetes patients. These adverse reactions were not present at baseline, occurred more commonly on AFREZZA than on comparator, and occurred in at least 2% of patients treated with AFREZZA.

Table 2. Common Adverse Reactions That Occurred in ≥ 2% in Patients with Type 1 Diabetes Mellitus (excluding Hypoglycemia) Treated with AFREZZA
AFREZZA
(n=1026)
Subcutaneous Insulin
(n = 835)
Cough 29.4% 4.9%
Throat pain or irritation 5.5% 1.9%
Headache 4.7% 2.8%
Pulmonary function test decreased 2.8% 1.0%
Bronchitis 2.5% 2.0%
Urinary tract infection 2.3% 1.9%

Hypoglycemia is the most commonly observed adverse reaction in patients using insulin, including AFREZZA [see Warnings and Precautions (5.3)] . The incidence of severe and non-severe hypoglycemia in AFREZZA-treated patients versus placebo-treated patients with type 2 diabetes is shown in Table 3. A hypoglycemic episode was recorded if a patient reported symptoms of hypoglycemia with or without a blood glucose value consistent with hypoglycemia. Severe hypoglycemia was defined as an event with symptoms consistent with hypoglycemia requiring the assistance of another person and associated with either a blood glucose value consistent with hypoglycemia or prompt recovery after treatment for hypoglycemia.

Table 3. Incidence of Severe and Non-Severe Hypoglycemia in a Placebo-Controlled Study of Patients with Type 2 Diabetes
AFREZZA
(N=177)
Placebo
(N=176)
Severe Hypoglycemia 5.1% 1.7%
Non-Severe Hypoglycemia 67% 30%

Approximately 27% of patients treated with AFREZZA reported cough, compared to approximately 5% of patients treated with comparator. In clinical trials, cough was the most common reason for discontinuation of AFREZZA therapy (3% of AFREZZA-treated patients).

Pulmonary Function Decline

In clinical trials lasting up to 2 years, excluding patients with chronic lung disease, patients treated with AFREZZA had a 40 mL (95% CI: -80, -1) greater decline from baseline in forced expiratory volume in one second (FEV 1 ) compared to patients treated with comparator anti-diabetes treatments. The decline occurred during the first 3 months of therapy and persisted over 2 years (Figure 2). A decline in FEV 1 of ≥ 15% occurred in 6% of AFREZZA-treated patients compared to 3% of comparator-treated patients [see Warnings and Precautions (5.4)].

Figure 2. Mean (+/-SE) Change in FEV 1 (Liters) from Baseline for Type 1 and Type 2 Diabetes Patients

Figure 2

Weight gain has occurred with some insulin therapies, including AFREZZA. Weight gain has been attributed to the anabolic effects of insulin and the decrease in glycosuria. In a clinical trial of patients with type 2 diabetes [see Clinical Studies (14.3)] , there was a mean 0.49 kg weight gain among AFREZZA-treated patients compared with a mean 1.13 kg weight loss among placebo-treated patients.

6.2 Postmarketing Experience

The following adverse reaction has been identified during post approval use of AFREZZA. 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: bronchospasm.

7.1 Drugs That May Increase the Risk of Hypoglycemia

The risk of hypoglycemia associated with AFREZZA use may be increased with antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analogs (e.g., octreotide), and sulfonamide antibiotics. Dose modification and increased frequency of glucose monitoring may be required when AFREZZA is given concomitantly with these drugs.

7.2 Drugs That May Decrease the Blood Glucose Lowering Effect of AFREZZA

The glucose lowering effect of AFREZZA may be decreased when given concomitantly with atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline) and thyroid hormones. Dose adjustment and increased frequency of glucose monitoring may be required when AFREZZA is given concomitantly with these drugs.

7.3 Drugs That May Increase or Decrease the Blood Glucose Lowering Effect of AFREZZA

The glucose lowering effect of AFREZZA may be increased or decreased when co-administered with alcohol, beta-blockers, clonidine, and lithium salts. Pentamidine may cause hypoglycemia, which may sometimes be followed by hyperglycemia. Dose modification and increased frequency of glucose monitoring may be required when AFREZZA is given concomitantly with these drugs.

7.4 Drugs That May Affect Hypoglycemia Signs and Symptoms

The signs and symptoms of hypoglycemia may be blunted when beta-blockers, clonidine, guanethidine, and reserpine are given concomitantly with AFREZZA.

8.1 Pregnancy

Risk Summary Limited available data with AFREZZA use in pregnant women are insufficient to determine drug-associated risks for adverse developmental outcomes. Available information from published studies with human insulin use during pregnancy has not reported a clear association with human insulin and adverse developmental outcomes ( see Data ). There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy ( see Clinical Considerations ). In animal reproduction studies, there were no adverse developmental outcomes with subcutaneous administration of carrier particles (vehicle without insulin) to pregnant rats during organogenesis at doses 21 times the human daily dose of 99 mg AFREZZA, based on AUC (see Data) . The estimated background risk of major birth defects is 6-10% in women with pre-gestational diabetes with HbA1c >7 and has been reported to be as high as 20-25% in women with 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, pre-eclampsia, spontaneous abortions, preterm delivery, stillbirth, and delivery complications. Poorly controlled diabetes increases the fetal risk for major birth defects, still birth, and macrosomia- related morbidity.

Human Data There are limited data with AFREZZA use in pregnant women. Published data do not report a clear association with human insulin and major birth defects, miscarriage, or adverse maternal or fetal outcomes when human insulin is used during pregnancy. However, these studies cannot definitely establish the absence of any risk because of methodological limitations including small sample size and lack of blinding.

Animal Data In pregnant rats given subcutaneous doses of 10, 30, and 100 mg/kg/day of carrier particles (vehicle without insulin) from gestation day 6 through 17 (organogenesis), no major malformations were observed at doses up to 100 mg/kg/day (21 times the human systemic exposure at a daily dose of 99 mg AFREZZA, based on AUC). In pregnant rabbits given subcutaneous doses of 2, 10, and 100 mg/kg/day of carrier particles (vehicle without insulin) from gestation day 7 through 19 (organogenesis), adverse maternal effects were observed in all dose groups (at human systemic exposure following a daily dose of 99 mg AFREZZA, based on AUC). In pregnant rats given subcutaneous doses of 10, 30, and 100 mg/kg/day of carrier particles (vehicle without insulin) from gestation day 7 through lactation day 20 (weaning), decreased epididymis and testes weights were observed in F1 male offspring, however, no decrease in fertility was noted, and impaired learning were observed in F1 pups at ³ 30 mg/kg/day (6 times the human systemic exposure at a daily dose of 99 mg AFREZZA, based on AUC).

8.2 Lactation

Risk Summary There are no data on the presence of AFREZZA in human milk, the effects on the breastfed infant, or the effects on milk production. One small published study reported that exogenous subcutaneous insulin was present in human milk. No adverse effects in infants were noted. The carrier particles are present in rat milk ( see Data ). Potential adverse reactions that are related to inhalational administration of AFREZZA are unlikely to be associated with potential exposure of AFREZZA through breast milk. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for AFREZZA and any potential adverse effects on the breastfed infant from AFREZZA or from the underlying maternal condition.

Data Subcutaneous administration of the carrier particle in lactating rats resulted in excretion of the carrier particle in rat milk at levels that were approximately 10% of the maternal exposure. Given the results of the rat study, it is highly likely that the insulin and carrier in AFREZZA are excreted in human milk.

8.4 Pediatric Use

The safety and effectiveness of AFREZZA to improve glycemic control in pediatric patients with diabetes mellitus has not been established. AFREZZA has not been studied in pediatric patients.

8.5 Geriatric Use

In the AFREZZA clinical studies , 671 (12%) patients were 65 years of age or older, of which 42 (0.8%) were 75 years of age or older. In these studies, 381 (13%) of AFREZZA-treated patients were 65 years of age or older, of which 20 (0.7%) were 75 years of age or older. No overall differences in effectiveness of AFREZZA have been observed between patients 65 years of age and older and younger adult patients [see Clinical Studies (14)] . Clinical studies of AFREZZA did not include sufficient numbers of patients 65 years of age and older to determine whether there were differences in safety between these patients and younger adult patients. Pharmacokinetic and pharmacodynamic studies to assess the effect of age on pharmacokinetics or pharmacodynamics on insulin human, respectively, have not been conducted.

8.6 Hepatic Impairment

The effect of hepatic impairment on the pharmacokinetics of AFREZZA has not been studied. Frequent glucose monitoring and a lower dosage may be necessary in AFREZZA-treated patients with hepatic impairment [see Warnings and Precautions (5.3)] .

8.7 Renal Impairment

The effect of renal impairment on the pharmacokinetics of AFREZZA has not been studied. Some studies with human insulin have shown increased circulating levels of insulin in patients with renal failure. Frequent glucose monitoring and a lower dosage may be necessary in AFREZZA-treated patients with renal impairment [see Warnings and Precautions (5.3)] .

Excess insulin administration may cause hypoglycemia and hypokalemia [see Warnings and Precautions (5.3, 5.8)] . Mild episodes of hypoglycemia due to insulin overdose can usually be treated with oral glucose. Adjustments in drug dosage, meal patterns, or exercise, may be needed. Severe episodes of hypoglycemia (due to insulin overdose) with coma, seizure, or neurologic impairment may be treated with intramuscular or subcutaneous glucagon or concentrated intravenous glucose. After apparent clinical recovery from hypoglycemia, continued observation and additional carbohydrate intake may be necessary to avoid recurrence of hypoglycemia. Hypokalemia should be corrected appropriately.

11.1 AFREZZA Cartridges

Human insulin is a rapid acting human insulin produced by recombinant DNA technology utilizing a non-pathogenic laboratory strain of Escherichia coli (K12). Chemically, human insulin has the empirical formula C 257 H 383 N 65 O 77 S 6 and a molecular weight of 5808. Human insulin has the following primary amino acid sequence:

Primary Amino Acid Sequence

AFREZZA (human insulin) inhalation powder is available in single-use plastic cartridges filled with a white powder containing insulin (human), which is administered via oral inhalation using the AFREZZA Inhaler only. Insulin is adsorbed onto carrier particles consisting of fumaryl diketopiperazine (FDKP) and polysorbate 80. AFREZZA Inhalation Powder is a dry powder supplied as 4 unit, 8 unit or 12 unit cartridges.

11.2 AFREZZA Inhaler

The AFREZZA Inhaler is breath-powered by the patient. When the patient inhales through the device, the powder is aerosolized and delivered to the lung. The amount of AFREZZA delivered to the lung will depend on individual patient factors.

12.1 Mechanism of Action

Insulin lowers blood glucose levels in adult patients with diabetes mellitus by stimulating peripheral glucose uptake by skeletal muscle and fat, and by inhibiting hepatic glucose production. Insulin inhibits lipolysis in adipocytes, inhibits proteolysis, and enhances protein synthesis.

12.2 Pharmacodynamics

The time course of insulin action (i.e., glucose lowering) may vary considerably in different patients or within the same patient. The average pharmacodynamic profile [i.e., glucose lowering effect measured by glucose infusion rate (GIR) over time in a euglycemic clamp study] after administration of a single AFREZZA dose of 4, 12, and 48 units in 30 patients with type 1 diabetes is shown in Figure 3(A), and key characteristics regarding the timing of the effects are described in Table 4:

Table 4. Timing of Insulin Effect (i.e., mean pharmacodynamics effect) After Administration of a Single AFREZZA Dose in Patients (N=30) with Type 1 Diabetes Mellitus
Parameter for Insulin Effect AFREZZA 4 units AFREZZA 12 units AFREZZA 48 units
Time to first measurable effect ~12 minutes ~12 minutes ~12 minutes
Time to peak effect ~35 minutes ~45 minutes ~55 minutes
Time for effect to return to baseline ~90 minutes ~180 minutes ~270 minutes

Figure 3. Results After Administration of AFREZZA 4, 12, and 48 Units in Patients with T1DM (N=30) A) Mean Insulin Effect (Baseline-Corrected Glucose Infusion Rate); and B) Pharmacokinetic (Baseline-Corrected Serum Insulin Concentration Profiles)

Figure 3

On average, the pharmacodynamics effect of AFREZZA, measured as area under the glucose infusion rate – time curve (AUC GIR) increased linearly with doses up to 48 units (106, 387, and 1581 mg/kg for 4, 12, and 48 units doses, respectively). Intrapatient variability in AUC GIR and GIR max was approximately 28% (95% CI 21-42%) and 27% (95% CI 20-40%), respectively.

12.3 Pharmacokinetics

The area under the plasma concentration versus time curve (AUC) of insulin increased dose proportionally up to 48 units. Intrapatient variability of AUC and peak concentration (C max ) of insulin was approximately 16% (95% CI 12-23%) and 21% (95% CI 16-30%), respectively.

Absorption The pharmacokinetic profiles for orally inhaled AFREZZA 4, 12, and 48 units from a study in 30 patients with type 1 diabetes are shown in Figure 5(B). The time to maximum serum insulin concentration (t max ) ranged from 10-20 minutes after oral inhalation of 4 to 48 units of AFREZZA.

Elimination The apparent terminal half-life ranged from 120 to 206 minutes. Serum insulin concentrations declined to baseline by approximately 60 to 240 minutes.

Metabolism and Excretion The metabolism and excretion of AFREZZA are comparable to regular human insulin.

Carrier Particles Clinical pharmacology studies showed that carrier particles [see Description (11.1)] are not metabolized and are eliminated unchanged in the urine following the lung absorption. Following oral inhalation of AFREZZA, a mean of 39% of the inhaled dose of carrier particles was distributed to the lungs and a mean of 7% of the dose was swallowed. The swallowed fraction was not absorbed from the GI tract and was eliminated unchanged in the feces.

Drug Interaction Studies

Bronchodilators and Inhaled Steroids Albuterol increased the AUC insulin after AFREZZA administration by 25% in patients with asthma [see Drug Interactions (7.2)]. AFREZZA is contraindicated in patients with asthma. In a study in healthy volunteers no significant change in insulin exposure was observed when fluticasone was administered following AFREZZA administration.

12.6 Immunogenicity

The observed incidence of anti-drug antibodies is highly dependent on the sensitivity and specificity of the assay. Differences in assay methods preclude meaningful comparisons of the incidence of anti-drug antibodies in the studies described below with the incidence of anti-drug antibodies in other studies, including those of insulin human or of other insulin human products. Increases in anti-insulin antibody concentrations were observed in patients treated with AFREZZA. Increases in anti-insulin antibodies were observed more frequently in patients treated with AFREZZA than in patients treated with subcutaneously injected mealtime insulin. There was no clinically significant effect of anti-drug antibodies on safety or effectiveness (as measured by HbA1c and fasting plasma glucose) of AFREZZA over the treatment duration of the studies which spanned 3 to 24 months.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

In a 104 week carcinogenicity study, rats were given doses up to 46 mg/kg/day of the carrier and up to 1.23 mg/kg/day of insulin, by nose-only inhalation. No increased incidence of tumors was observed at systemic exposures equivalent to the insulin at a daily AFREZZA dose of 99 mg, based on a comparison of relative body surface areas across species. No increased incidence of tumors was observed in a 26 week carcinogenicity study in transgenic mice (Tg-ras-H2) given doses up to 75 mg/kg/day of carrier and up to 5 mg/kg/day of AFREZZA. AFREZZA was not genotoxic in Ames bacterial mutagenicity assay and in the chromosome aberration assay, using human peripheral lymphocytes with or without metabolic activation. The carrier alone was not genotoxic in the in vivo mouse micronucleus assay. In fertility study in male and female rats at subcutaneous doses of 10, 30, and 100 mg/kg/day of carrier (vehicle without insulin), there were no adverse effects on male fertility at doses up to 100 mg/kg/day. In female rats dosed 2 weeks prior to mating until gestation day 7, there was increased pre- and post-implantation loss at 100 mg/kg/day but not at 30 mg/kg/day (21 times and 6 times, respectively the human systemic exposure at a daily dose of 99 mg AFREZZA, based on AUC).

14.1 Overview of Clinical Studies of AFREZZA in Adults for Diabetes Mellitus

AFREZZA has been studied in adults with type 1 diabetes in combination with basal insulin. The efficacy of AFREZZA, in combination with basal insulin, in type 1 diabetes patients was compared to insulin aspart in combination with basal insulin. AFREZZA has been studied in adults with type 2 diabetes in combination with oral antidiabetic drugs. The efficacy of AFREZZA in type 2 diabetes patients was compared to placebo inhalation.

14.2 Adults with Type 1 Diabetes

Patients with inadequately controlled type 1 diabetes participated in a 24-week, open-label, active-controlled study to evaluate the glucose lowering effect of mealtime AFREZZA used in combination with a basal insulin. Following a 4-week basal insulin optimization period, 344 patients were randomized to AFREZZA by oral inhalation (n=174) or insulin aspart given subcutaneously (n=170) at each meal of the day. All patients received basal insulin. Mealtime insulin doses were titrated to glycemic goals for the first 12 weeks and kept stable for the last 12 weeks of the study.

Results At Week 24, treatment with mealtime AFREZZA and basal insulin provided a mean reduction in HbA1c that met the pre-specified non-inferiority margin of 0.4%. AFREZZA and basal insulin provided less HbA1c reduction than insulin aspart and basal insulin, and the difference was statistically significant. More patients in the insulin aspart and basal insulin group achieved the HbA1c target of ≤7% (Table 5).

Table 5. Results at Week 24 in an Active-Controlled Study of Mealtime AFREZZA plus Basal Insulin in Adults with Type 1 Diabetes
a Adjusted mean was obtained using a Mixed Model Repeated Measures (MMRM) approach with HbA1c or FPG as the dependent variable and treatment, visit, region, basal insulin stratum, and treatment by visit interaction as fixed factors, and corresponding baseline as a covariate. An autoregression (1) [AR(1)] covariance structure was used.
b Data at 24 weeks were available from 131 (75%) and 150 (88%) patients randomized to the AFREZZA and insulin aspart groups, respectively.
c The percentage was calculated based on the number of patients randomized to the trial.
Efficacy Parameter AFREZZA + Basal Insulin (N=174) Insulin Aspart + Basal Insulin
(N=170)
HbA1c (%)
Baseline (adjusted mean a ) 7.94 7.92
Change from baseline (adjusted mean a,b ) -0.21 -0.40
Difference from insulin aspart (adjusted mean a,b )
(95% CI)
0.19
(0.02, 0.36)
Percentage of patients achieving HbA1c ≤ 7% c 14% 27%
Fasting Plasma Glucose (mg/dL)
Baseline (adjusted mean a ) 153.9 151.6
Change from baseline (adjusted mean a, b ) -25.3 10.2
Difference from insulin aspart (adjusted mean a, b )
(95% CI)
-35.4
(-56.3, -14.6)

14.3 Adults with Type 2 Diabetes

A total of 479 adult patients with type 2 diabetes inadequately controlled on optimal/maximally tolerated doses of metformin only, or 2 or more oral antidiabetic (OAD) agents participated in a 24-week, double-blind, placebo-controlled study. Following a 6-week run-in period, 353 patients were randomized to AFREZZA by oral inhalation (n=177) or an inhaled placebo powder without insulin (n=176). Insulin doses were titrated for the first 12 weeks and kept stable for the last 12 weeks of the study. OADs doses were kept stable in the study.

Results At Week 24, treatment with AFREZZA plus OADs provided a mean reduction in HbA1c that was statistically significantly greater compared to the HbA1c reduction observed in the placebo plus OADs group (Table 6).

Table 6. Results at Week 24 in a Placebo-Controlled Study of AFREZZA in Adults with Type 2 Diabetes Inadequately Controlled on Oral Antidiabetic Agents
a Adjusted mean was obtained using a Mixed Model Repeated Measures (MMRM) approach with HbA1c or FPG as the dependent variable and treatment, visit, region, and treatment by visit interaction as fixed factors, and corresponding baseline as a covariate. An autoregression (1) [AR(1)] covariance structure was used.
b Data at 24 weeks without rescue therapy were available from 139 (79%) and 129 (73%) patients randomized to the AFREZZA and placebo groups, respectively.
c The percentage was calculated based on the number of patients randomized to the trial.
Efficacy Parameter AFREZZA + Oral Anti-Diabetic Agents
(N=177)
Placebo + Oral Anti-Diabetic Agents
(N=176)
HbA1c (%)
Baseline (adjusted mean a ) 8.25 8.27
Change from baseline (adjusted mean a,b ) -0.82 -0.42
Difference from placebo (adjusted mean a,b )
(95% CI)
-0.40
(-0.57, -0.23)
Percentage (%) of patients achieving HbA1C ≤7% c 32% 15%
Fasting Plasma Glucose (mg/dL)
Baseline (adjusted mean a ) 175.9 175.2
Change from baseline (adjusted mean a,b ) -11.2 -3.8
Difference from placebo (adjusted mean a,b )
(95% CI)
-7.4
(-18.0, 3.2)

AFREZZA (insulin human) Inhalation Powder is available as 4 unit, 8 unit and 12 unit single-use cartridges. Three cartridges are contained in a single cavity of a blister strip. Each card contains 5 blister strips (each containing three cartridges) separated by perforations for a total of 15 cartridges. Two cards of the same cartridge strength are packaged in a foil laminate overwrap (30 cartridges per foil package). The cartridges are color-coded, blue for 4 units, green for 8 units and yellow for 12 units. Each cartridge is marked with “afrezza” and “4 units”, “8 units” or “12 units”. The AFREZZA Inhaler is individually packaged in a clear overwrap. The inhaler is fully assembled with a removable mouthpiece cover. The AFREZZA Inhaler can be used for up to 15 days from the date of first use. After 15 days of use, the inhaler must be discarded and replaced with a new inhaler. AFREZZA (insulin human) Inhalation Powder is available in the following configurations:

NDC Cartridge Strength Quantity of Cartridges per Strength Total Quantity of Cartridges per Kit Total Units in Kit Number of Inhalers
47918-874-90 4 units 90 90 360 Units 2
47918-878-90 8 units 90 90 720 Units 2
47918-891-90 12 units 90 90 1080 Units 2
47918-898-18 8 units, 12 units 90 180 1800 Units 2
47918-880-18
(Titration Pack)
4 units, 8 units 90 180 1080 Units 2
47918-902-18
(Titration Pack)
4 units, 8 units, 12 units 60 180 1440 Units 2
Storage : Not in Use: Refrigerated Storage 2-8ºC (36-46ºF)
* If a foil package, blister card or strip is not refrigerated, the contents must be used within 10 days.
Sealed (Unopened) Foil Package May be stored until the Expiration Date*
Sealed (Unopened) Blister Cards + Strips Must be used within 1 month*
In Use: Room Temperature Storage 25ºC (77ºF), excursions permitted 15-30ºC (59-86ºF)
Sealed (Unopened) Blister Cards + Strips Must be used within 10 days
Opened Strips Must be used within 3 days

Do not put a blister card or strip back into the refrigerator after being stored at room temperature.

Inhaler Storage : Store refrigerated or at room temperature 2-25ºC (36-77ºF); excursions permitted. Inhaler may be stored refrigerated, but should be at room temperature before use.

Handling : Before use, cartridges should be at room temperature for 10 minutes.

Advise the patient to read the FDA-approved patient labeling (Medication Guide and Instructions for Use). Instruct patients to use AFREZZA only with the AFREZZA inhaler.

Common Adverse Reactions Inform patients that the most common adverse reactions associated with the use of AFREZZA are hypoglycemia, cough, and throat pain or irritation.

Pregnancy Advise women with diabetes to inform their physician if they are pregnant or are planning to become pregnant while using AFREZZA.

Acute Bronchospasm in Patients with Chronic Lung Disease Advise patients that if they experience any respiratory difficulty after inhalation of AFREZZA, they should report it to their healthcare provider immediately for assessment.

Hypoglycemia Instruct patients on self-management procedures including glucose monitoring, proper inhalation technique, and management of hypoglycemia and hyperglycemia especially at initiation of AFREZZA therapy. Instruct patients on handling of special situations such as intercurrent conditions (illness, stress, or emotional disturbances), an inadequate or skipped insulin dose, inadvertent administration of an increased insulin dose, inadequate food intake, or skipped meals. Instruct patients on the management of hypoglycemia. Inform patients that their ability to concentrate and react may be impaired as a result of hypoglycemia. Advise patients who have frequent hypoglycemia or reduced or absent warning signs of hypoglycemia to use caution when driving or operating machinery [see Warnings and Precautions (5.3)].

Decline in Pulmonary Function Inform patients that AFREZZA can cause a decline in lung function [see Warnings and Precautions (5.4)].

Lung Cancer Inform patients to promptly report any signs or symptoms potentially related to lung cancer [see Warnings and Precautions (5.5)].

Diabetic Ketoacidosis Instruct patients to carefully monitor their blood glucose during illness, infection, and other risk situations for diabetic ketoacidosis and to contact their healthcare provider if their blood glucose control worsens [see Warnings and Precautions (5.6)].

Hypersensitivity Reactions Advise patients that hypersensitivity reactions can occur with insulin therapy including AFREZZA. Inform patients on the symptoms of hypersensitivity reactions [see Warnings and Precautions (5.7)]. Manufactured by: MannKind Corporation, Danbury, CT 06810
US License No. #2190
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