Kitabis Pak

6 ADVERSE REACTIONS The following serious adverse reactions are described below and elsewhere in the labeling: Bronchospasm [see Warnings and Precautions ( 5.1 )] Ototoxicity [see Warnings and Precautions ( 5.2 )] The most common adverse reactions (> 5%) in patients treated with tobramycin inhalation solution were increased cough, pharyngitis, increased sputum, dyspnea, hemoptysis, decreased lung function, voice alteration, taste perversion and rash ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Pari Respiratory Equipment at 1-877-236-7239 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. Tobramycin inhalation solution was studied in two clinical studies in 258 cystic fibrosis patients ranging in age from 6 to 48 years. Patients received tobramycin inhalation solution in alternating periods of 28 days on and 28 days off drug in addition to their standard cystic fibrosis therapy for a total of 24 weeks. Adverse reactions reported in these studies are described below: The most frequent adverse reactions in the tobramycin inhalation arm were cough, pharyngitis, and increased sputum (see Table 1 ). Thirty-three patients (13%) treated with tobramycin inhalation solution complained of voice alteration compared to 17 (7%) placebo patients. Voice alteration was more common in the on-drug periods. Eight patients from the tobramycin inhalation solution group (3%) reported tinnitus compared to no placebo patients. All episodes were transient, resolved without discontinuation of the tobramycin inhalation solution treatment regimen, and were not associated with loss of hearing in audiograms. Table 1 lists the percent of patients with selected adverse reactions that occurred in > 5% of tobramycin inhalation solution patients during the two Phase III studies. Table 1: Percent of Patients with Selected Adverse Reactions Occurring in > 5% of Tobramycin Inhalation Solution Patients 1 Includes reported decreases in pulmonary function tests or decreased lung volume on chest radiograph associated with intercurrent illness or study drug administration. Adverse Reaction Tobramycin Inhalation Solution (n=258) % Placebo (n=262) % Cough Increased 46.1 47.3 Pharyngitis 38.0 39.3 Sputum Increased 37.6 39.7 Dyspnea 33.7 38.5 Hemoptysis 19.4 23.7 Lung Function Decrease 1 16.3 15.3 Voice Alteration 12.8 6.5 Taste Perversion 6.6 6.9 Rash 5.4 6.1 Selected adverse reactions that occurred in less than or equal to 5% of patients treated with tobramycin inhalation solution: Ear and labyrinth disorders Tinnitus Musculoskeletal and connective tissue disorders Myalgia Infections and infestations Laryngitis 6.2 Postmarketing Experience The following adverse reactions have been identified during post approval use of tobramycin inhalation solution. 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. Ear and labyrinth disorders Hearing loss: Some of these reports occurred in patients with previous or concomitant treatment with systemic aminoglycosides. Patients with hearing loss frequently reported tinnitus. [see Warnings and Precautions ( 5.2 )] Skin and subcutaneous tissue disorders Hypersensitivity, pruritus, urticaria, rash Nervous system disorders Aphonia, dysgeusia Respiratory, thoracic, and mediastinal disorders Bronchospasm [see Warnings and Precautions ( 5.1 )] , oropharyngeal pain

4 CONTRAINDICATIONS Tobramycin inhalation solution is contraindicated in patients with a known hypersensitivity to any aminoglycoside. Known hypersensitivity to any aminoglycoside ( 4 ).

11 DESCRIPTION KITABIS PAK contains tobramycin inhalation solution, USP and the PARI LC PLUS Reusable Nebulizer (PARI LC PLUS). Tobramycin inhalation solution is a sterile, clear, slightly yellow, non-pyrogenic, aqueous solution with the pH and salinity adjusted specifically for administration by a compressed air driven PARI LC PLUS Reusable Nebulizer. The chemical formula for tobramycin is C H N O and the molecular weight is 467.52. Tobramycin is O-3-amino-3-deoxy-α-D-glucopyranosyl-(1→4)-O-[2,6-diamino-2,3,6-trideoxy-a-D- ribo - hexopyranosyl-(1→6)]-2-deoxy-L-streptamine. The structural formula for tobramycin is: Each single-use 5 mL ampule contains 300 mg tobramycin and 11.25 mg sodium chloride in sterile water for injection. Sulfuric acid and sodium hydroxide are added to adjust the pH to 6.0. Nitrogen is used for sparging. The formulation contains no preservatives. The inhalation solution has an osmolality in the range 135 to 200 mOsmol/kg. The PARI LC PLUS Reusable Nebulizer has the following performance characteristics with tobramycin inhalation solution [measured using Next Generation Impactor (NGI) at 15 L/min continuous flow, standard conditions (50%RH, 23°C)]: (1) Delivered Dose: 174 mg; (2) Fine Particle Dose (< 5μm): 97 mg; (3) Nebulization Time: 13 min.; (4) Mass Median Aerodynamic Diameter: 4.3 μm; (5) Geometric Standard Deviation (GSD): 2.2 μm. Structural Formula

2 DOSAGE AND ADMINISTRATION KITABIS PAK is a co-packaging of tobramycin inhalation solution with a PARI LC PLUS ® Reusable Nebulizer ( 2.1 ). Administer tobramycin inhalation solution as one single–use ampule (300 mg/5 mL) twice a day by oral inhalation in alternating periods of 28 days on drug, followed by 28 days off drug ( 2.1 ). Dosage is not adjusted by weight ( 2.1 ). Take doses as close to 12 hours apart as possible; but not less than 6 hours apart ( 2.1 ). Administer each 300 mg dose using the PARI LC PLUS Reusable Nebulizer and DeVilbiss ® Pulmo-Aide ® compressor ( 2.2 ). 2.1 Dosing Information KITABIS PAK is a co-packaging of tobramycin inhalation solution ampules with a PARI LC PLUS Reusable Nebulizer. Administer as follows: One single-use ampule (300 mg/5 mL) of tobramycin inhalation solution twice a day by oral inhalation in alternating periods of 28 days on drug, followed by 28 days off drug. The 300 mg/5 mL dose of tobramycin inhalation solution is the same for all patients regardless of age or weight. The doses should be taken as close to 12 hours apart as possible; they should not be taken less than 6 hours apart. 2.2 Administration of Tobramycin Inhalation Solution Each dose of tobramycin inhalation solution is administered by oral inhalation using only the co-packaged PARI LC PLUS Reusable Nebulizer (Model No. 022B81-TA) included in the KITABIS PAK, along with a DeVilbiss Pulmo-Aide air compressor (Model No. 5650D). Tobramycin inhalation solution is not for subcutaneous, intravenous or intrathecal administration. Prior to administration, read the Patient Information / Instructions for Use for KITABIS PAK for detailed information on how to use KITABIS PAK and follow the manufacturer's instructions for use and care of the DeVilbiss Pulmo-Aide air compressor. The entire tobramycin inhalation solution treatment should take approximately 15 minutes to complete. Continue treatment until all the tobramycin inhalation solution has been delivered, and there is no longer any mist being produced. Tobramycin inhalation solution should not be diluted or mixed with other drugs including dornase alfa in the nebulizer. Instruct patients on multiple therapies to take their medications prior to inhaling the tobramycin inhalation solution, or as directed by their physician. Tobramycin inhalation solution should not be used if it is cloudy, if there are particles in the solution, or if it has been stored at room temperature for more than 28 days.

1 INDICATIONS AND USAGE KITABIS PAK (co-packaging of tobramycin inhalation solution and PARI LC PLUS Reusable Nebulizer) is indicated for the management of cystic fibrosis in adults and pediatric patients 6 years of age and older with P. aeruginosa . Safety and efficacy have not been demonstrated in patients under the age of 6 years, patients with FEV 1 < 25% or > 75% predicted, or patients colonized with Burkholderia cepacia [see Clinical Studies ( 14 )]. KITABIS PAK contains tobramycin, an aminoglycoside antibacterial drug indicated for the management of cystic fibrosis in adults and pediatric patients 6 years of age and older with Pseudomonas aeruginosa ( 1 ).

10 OVERDOSAGE Signs and symptoms of acute toxicity from overdosage of IV tobramycin might include dizziness, tinnitus, vertigo, loss of high-tone hearing acuity, respiratory failure, and neuromuscular blockade. Administration by inhalation results in low systemic bioavailability of tobramycin. Tobramycin is not significantly absorbed following oral administration. Tobramycin serum concentrations may be helpful in monitoring overdosage.

7 DRUG INTERACTIONS Concurrent and/or sequential use with other drugs with neurotoxic, nephrotoxic or ototoxic potential should be avoided ( 7.1 ). Concomitant administration with ethacrynic acid, furosemide, urea, or intravenous mannitol is not recommended due to possible enhancement of aminoglycoside toxicity ( 7.2 ). 7.1 Drugs with Neurotoxic, Nephrotoxic or Ototoxic Potential Concurrent and/or sequential use of tobramycin inhalation solution with other drugs with neurotoxic, nephrotoxic, or ototoxic potential should be avoided if possible. 7.2 Diuretics Some diuretics can enhance aminoglycoside toxicity by altering aminoglycoside concentrations in serum and tissue. Tobramycin inhalation solution should not be administered concomitantly with ethacrynic acid, furosemide, urea, or intravenous mannitol.

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Tobramycin is an aminoglycoside antibacterial [see Microbiology ( 12.4 ) ]. 12.3 Pharmacokinetics Absorption Tobramycin inhalation solution contains tobramycin, a cationic polar molecule that does not readily cross epithelial membranes. 1 The bioavailability of tobramycin inhalation solution may vary because of individual differences in nebulizer performance and airway pathology. 2 Following administration of tobramycin inhalation solution, tobramycin remains concentrated primarily in the airways. Sputum Concentrations Ten minutes after inhalation of the first 300 mg dose of tobramycin inhalation solution, the average concentration of tobramycin was 1237 mcg/g (ranging from 35 to 7414 mcg/g) in sputum. Tobramycin does not accumulate in sputum; after 20 weeks of therapy with the tobramycin inhalation solution regimen, the average concentration of tobramycin at ten minutes after inhalation was 1154 mcg/g (ranging from 39 to 8085 mcg/g) in sputum. High variability of tobramycin concentration in sputum was observed. Two hours after inhalation, sputum concentrations declined to approximately 14% of tobramycin levels at ten minutes after inhalation. Serum Concentrations The average serum concentration of tobramycin one hour after inhalation of a single 300 mg dose of tobramycin inhalation solution by cystic fibrosis patients was 0.95 mcg/mL. After 20 weeks of therapy on the tobramycin inhalation solution regimen, the average serum tobramycin concentration one hour after dosing was 1.05 mcg/mL. Distribution Following administration of tobramycin inhalation solution, tobramycin remains concentrated primarily in the airways. Binding of tobramycin to serum proteins is negligible. Elimination Metabolism Tobramycin is not metabolized. Excretion The elimination half-life of tobramycin from serum is approximately 2 hours after intravenous (IV) administration. Assuming tobramycin absorbed following inhalation behaves similarly to tobramycin following IV administration, systemically absorbed tobramycin is eliminated principally by glomerular filtration. Unabsorbed tobramycin, following tobramycin inhalation solution administration, is likely eliminated primarily in expectorated sputum. 12.4 Microbiology Mechanism of Action Tobramycin is an aminoglycoside antibacterial produced by Streptomyces tenebrarius . It acts primarily by disrupting protein synthesis, leading to altered cell membrane permeability, progressive disruption of the cell envelope, and eventual cell death. 3 ​ Tobramycin has in vitro activity against Gram-negative bacteria including P. aeruginosa . It is bactericidal in vitro at peak concentrations equal to or slightly greater than the minimum inhibitory concentration. Resistance Treatment for 6 months with tobramycin inhalation solution in two clinical studies did not affect the susceptibility of the majority of P. aeruginosa isolates tested; however, increased minimum inhibitory concentrations (MICs) were noted in some patients. The clinical significance of this information has not been clearly established in the treatment of P. aeruginosa in cystic fibrosis patients [see Clinical Studies ( 14 )] . Susceptibility Testing Interpretive criteria for inhaled antibacterial products are not defined. The in vitro antimicrobial susceptibility test methods used for parenteral tobramycin therapy can be used to monitor the susceptibility of P. aeruginosa isolated from cystic fibrosis patients. 4,5,6 If decreased susceptibility is noted, the results should be reported to the clinician. Susceptibility breakpoints established for parenteral administration of tobramycin do not apply to aerosolized administration of tobramycin inhalation solution. The relationship between in vitro susceptibility test results and clinical outcome with tobramycin inhalation solution therapy is not clear. A single sputum sample from a cystic fibrosis patient may contain multiple morphotypes of Pseudomonas aeruginosa and each morphotype may have a different level of in vitro susceptibility to tobramycin. For specific information regarding susceptibility test interpretive criteria and associated test methods and quality control standards recognized by FDA for this drug, please see: https://www.fda.gov/STIC.

12.1 Mechanism of Action Tobramycin is an aminoglycoside antibacterial [see Microbiology ( 12.4 ) ].

12.3 Pharmacokinetics Absorption Tobramycin inhalation solution contains tobramycin, a cationic polar molecule that does not readily cross epithelial membranes. 1 The bioavailability of tobramycin inhalation solution may vary because of individual differences in nebulizer performance and airway pathology. 2 Following administration of tobramycin inhalation solution, tobramycin remains concentrated primarily in the airways. Sputum Concentrations Ten minutes after inhalation of the first 300 mg dose of tobramycin inhalation solution, the average concentration of tobramycin was 1237 mcg/g (ranging from 35 to 7414 mcg/g) in sputum. Tobramycin does not accumulate in sputum; after 20 weeks of therapy with the tobramycin inhalation solution regimen, the average concentration of tobramycin at ten minutes after inhalation was 1154 mcg/g (ranging from 39 to 8085 mcg/g) in sputum. High variability of tobramycin concentration in sputum was observed. Two hours after inhalation, sputum concentrations declined to approximately 14% of tobramycin levels at ten minutes after inhalation. Serum Concentrations The average serum concentration of tobramycin one hour after inhalation of a single 300 mg dose of tobramycin inhalation solution by cystic fibrosis patients was 0.95 mcg/mL. After 20 weeks of therapy on the tobramycin inhalation solution regimen, the average serum tobramycin concentration one hour after dosing was 1.05 mcg/mL. Distribution Following administration of tobramycin inhalation solution, tobramycin remains concentrated primarily in the airways. Binding of tobramycin to serum proteins is negligible. Elimination Metabolism Tobramycin is not metabolized. Excretion The elimination half-life of tobramycin from serum is approximately 2 hours after intravenous (IV) administration. Assuming tobramycin absorbed following inhalation behaves similarly to tobramycin following IV administration, systemically absorbed tobramycin is eliminated principally by glomerular filtration. Unabsorbed tobramycin, following tobramycin inhalation solution administration, is likely eliminated primarily in expectorated sputum.

20230410

9

3 DOSAGE FORMS AND STRENGTH Inhalation solution: 300 mg/5 mL in a single-use ampule Inhalation Solution: 300 mg in a single-use 5 mL ampule ( 3 ).

Kitabis Pak Tobramycin Tobramycin Tobramycin Sodium Chloride Sulfuric Acid Water

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility A two-year rat inhalation toxicology study to assess carcinogenic potential of tobramycin inhalation solution has been completed. Rats were exposed to tobramycin inhalation solution for up to 1.5 hours per day for 95 weeks. The clinical formulation of the drug was used for this carcinogenicity study. Serum levels of tobramycin of up to 35 mcg/mL were measured in rats, in contrast to the average 1 mcg/mL levels observed in cystic fibrosis patients in clinical trials. There was no drug-related increase in the incidence of any variety of tumor. Additionally, tobramycin has been evaluated for genotoxicity in a battery of in vitro and in vivo tests. The Ames bacterial reversion test, conducted with 5 tester strains, failed to show a significant increase in revertants with or without metabolic activation in all strains. Tobramycin was negative in the mouse lymphoma forward mutation assay, did not induce chromosomal aberrations in Chinese hamster ovary cells, and was negative in the mouse micronucleus test. Subcutaneous administration of up to 100 mg/kg of tobramycin did not affect mating behavior or cause impairment of fertility in male or female rats.

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility A two-year rat inhalation toxicology study to assess carcinogenic potential of tobramycin inhalation solution has been completed. Rats were exposed to tobramycin inhalation solution for up to 1.5 hours per day for 95 weeks. The clinical formulation of the drug was used for this carcinogenicity study. Serum levels of tobramycin of up to 35 mcg/mL were measured in rats, in contrast to the average 1 mcg/mL levels observed in cystic fibrosis patients in clinical trials. There was no drug-related increase in the incidence of any variety of tumor. Additionally, tobramycin has been evaluated for genotoxicity in a battery of in vitro and in vivo tests. The Ames bacterial reversion test, conducted with 5 tester strains, failed to show a significant increase in revertants with or without metabolic activation in all strains. Tobramycin was negative in the mouse lymphoma forward mutation assay, did not induce chromosomal aberrations in Chinese hamster ovary cells, and was negative in the mouse micronucleus test. Subcutaneous administration of up to 100 mg/kg of tobramycin did not affect mating behavior or cause impairment of fertility in male or female rats.

NDA205433

Kitabis Pak

Tobramycin

24492-850

HUMAN PRESCRIPTION DRUG

RESPIRATORY (INHALATION)

12.4 Microbiology Mechanism of Action Tobramycin is an aminoglycoside antibacterial produced by Streptomyces tenebrarius . It acts primarily by disrupting protein synthesis, leading to altered cell membrane permeability, progressive disruption of the cell envelope, and eventual cell death. 3 ​ Tobramycin has in vitro activity against Gram-negative bacteria including P. aeruginosa . It is bactericidal in vitro at peak concentrations equal to or slightly greater than the minimum inhibitory concentration. Resistance Treatment for 6 months with tobramycin inhalation solution in two clinical studies did not affect the susceptibility of the majority of P. aeruginosa isolates tested; however, increased minimum inhibitory concentrations (MICs) were noted in some patients. The clinical significance of this information has not been clearly established in the treatment of P. aeruginosa in cystic fibrosis patients [see Clinical Studies ( 14 )] . Susceptibility Testing Interpretive criteria for inhaled antibacterial products are not defined. The in vitro antimicrobial susceptibility test methods used for parenteral tobramycin therapy can be used to monitor the susceptibility of P. aeruginosa isolated from cystic fibrosis patients. 4,5,6 If decreased susceptibility is noted, the results should be reported to the clinician. Susceptibility breakpoints established for parenteral administration of tobramycin do not apply to aerosolized administration of tobramycin inhalation solution. The relationship between in vitro susceptibility test results and clinical outcome with tobramycin inhalation solution therapy is not clear. A single sputum sample from a cystic fibrosis patient may contain multiple morphotypes of Pseudomonas aeruginosa and each morphotype may have a different level of in vitro susceptibility to tobramycin. For specific information regarding susceptibility test interpretive criteria and associated test methods and quality control standards recognized by FDA for this drug, please see: https://www.fda.gov/STIC.

Principal Display Panel - Kitabis Pak NDC: 24492-850-56 PARI Kitabis TM Pak Tobramycin Inhalation Solution, USP Store in Refrigerator Includes One PARI LC PLUS Nebulizer Set Rx only carton label

Warnings and Precautions, Ototoxicity (5.2) 2/2023

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling ( Patient Information and Instructions for Use ). Instructions for Administration Instruct patients to read the Instructions for Use before starting KITABIS PAK. Instruct patients to use the tobramycin inhalation solution in KITABIS PAK only with the PARI LC PLUS Reusable Nebulizer included in the KITABIS PAK. Difficulty Breathing Advise patients to inform their physicians if they experience shortness of breath or wheezing after administration of tobramycin inhalation solution. Tobramycin inhalation solution can cause a narrowing of the airway [see Warnings and Precautions ( 5.1 )]. Hearing Loss Advise patients to inform their physician if they experience ringing in the ears, dizziness, or any changes in hearing because tobramycin inhalation solution has been associated with hearing loss [see Warnings and Precautions ( 5.2 )]. Kidney Damage Advise patients to inform their physician if they have any history of kidney problems because tobramycin inhalation solution is in a class of drugs that have caused kidney damage [see Warnings and Precautions ( 5.3 )]. Embryo-Fetal Toxicity: Advise pregnant women that aminoglycosides can cause irreversible congenital deafness when administered to a pregnant woman [see Warnings and Precautions ( 5.5 ) and Use in Specific Populations ( 8.1 )]. Lactation: Advise a woman to monitor their breastfed infants for diarrhea and/or bloody stools [see Use in Specific Populations ( 8.2 )] . Additional Information PARI LC PLUS ® Reusable Nebulizer: 1-800-327-8632 DeVilbiss ® Pulmo-Aide ® Air Compressor: 1-800-338-1988 KITABIS PAK: 1-844-KITABIS (548-2247) Manufactured by: Catalent Pharma Solutions, LLC Woodstock, IL 60098 Distributed by: PARI Respiratory Equipment, Inc. 2412 PARI Way, Midlothian, VA 23112 850D5601 Rev. E 04/2023 © 2013-2023 PulmoFlow, Inc. All rights reserved. Pari logo

INSTRUCTIONS FOR USE KITABIS PAK (Ki TAH biss Pak) (tobramycin inhalation solution), for oral inhalation Follow the instructions below for using KITABIS PAK which contains tobramycin inhalation solution and the PARI LC PLUS Reusable Nebulizer (PARI LC PLUS). If you have any questions, ask your healthcare provider or pharmacist. Each KITABIS PAK carton (28-day supply) contains 56 tobramycin inhalation solution ampules packed in 14 foil pouches that each contain 4 singleuse tobramycin inhalation solution ampules. You will need the following supplies (See Figure A ): 1 tobramycin inhalation solution ampule PARI LC PLUS Reusable Nebulizer DeVilbiss Pulmo-Aide (Pulmo-Aide) air compressor tubing to connect the nebulizer and compressor clean, lint-free towel nose clip (optional, not pictured) Note: Read the Instructions for Use that come with your PARI LC PLUS Reusable Nebulizer and DeVilbiss Pulmo-Aide air compressor for detailed instructions on how to use and care for your nebulizer and air compressor before you use it. Do not mix the medicine in KITABIS PAK with other medicines in your nebulizer. The medicine in KITABIS PAK (tobramycin inhalation solution) comes in a sealed foil pouch. Do not open a sealed pouch until you are ready to use a dose. After opening the pouch, unopened ampules should be returned to and stored in the pouch. Getting ready: Open the PARI LC PLUS package. Place the PARI LC PLUS parts including Top and Bottom (Nebulizer Cup) Assembly, Inspiratory Valve Cap, Mouthpiece with Valve, and Tubing on a clean, dry surface or towel (See Figure B ). Preparing your KITABIS PAK dose: Step 1: Wash your hands with soap and water (See Figure C ). Step 2: Open the foil pouch (See Figure D ). Step 3: Separate 1 ampule by gently pulling apart starting at the top of the ampules and continue down to the bottom tabs (See Figure E ) and use it right away. Step 4: Hold the bottom tab on the KITABIS PAK ampule with 1 hand (See Figure F ). With your other hand, hold the top of the ampule and twist off the top of the ampule (See Figure F ). Do not squeeze the ampule until you are ready to squeeze all of the medicine into the Nebulizer Cup. Step 5: Hold the Nebulizer Cup and twist off the Nebulizer Insert or Top in a counter-clockwise direction (See Figure G ). Set the Top aside on a clean, dry, surface. Step 6: Squeeze all the medicine from the ampule into the Nebulizer Cup (See Figure H ). Step 7: Replace the Nebulizer Insert. Line up the semicircle on the Nebulizer Insert with the Nebulizer Outlet and twist on the Nebulizer Insert in a clockwise direction until it is tight and the alignment rings are lined up (See Figure I ). Step 8: Push the Mouthpiece straight onto the Nebulizer Cup (See Figure J ). Step 9: Firmly push the Inspiratory Valve Cap straight down onto the Nebulizer Cup Top (See Figure K ). The Inspiratory Valve Cap should fit tightly. Step 10: Connect 1 end of the tubing to the compressor air outlet (See Figure L ). The tubing should fit tightly. Step 11: Plug your compressor into an electrical outlet (See Figure M ). Step 12: Hold the Nebulizer Cup upright and firmly push the free end of the tubing straight up onto the Air Intake on the bottom of the Nebulizer Cup (See Figure N ). Make sure to keep the Nebulizer Cup upright. Giving your KITABIS PAK dose: Step 13: Turn on the compressor (See Figure O ). You should see a steady mist coming from the Mouthpiece (See Figure P ). Step 14: Sit or stand in a comfortable, upright position that will allow you to breathe normally. Place the Mouthpiece between your teeth and on top of your tongue and breathe normally only through your mouth (See Figure Q ). Nose clips may help you breathe only through your mouth and not through your nose. Step 15: Keep breathing in your KITABIS PAK dose for at least 15 minutes. You will know that you have received your full dose of medicine when you hear a “sputtering noise” coming from the Mouthpiece for at least 1 minute and the Nebulizer Cup is empty. After your KITABIS PAK dose: Step 16: Clean and disinfect your nebulizer (see manufacturer's Instructions for Use). Care and Use of your DeVilbiss Pulmo-Aide compressor: Follow the manufacturer's instructions for care and use of your compressor. How should I store KITABIS PAK? Store tobramycin inhalation solution in the refrigerator between 36°F to 46°F (2°C to 8°C) until needed. You may store the tobramycin inhalation solution in the foil pouches (opened or unopened) at room temperature between 68°F to 77°F (20°C to 25°C) for up to 28 days. Do not use tobramycin inhalation solution after the expiration date stamped on the ampule. Keep tobramycin inhalation solution in the foil pouch and out of the light. Tobramycin inhalation solution is normally slightly yellow, but may get darker with age if unrefrigerated. The color change does not change how the medicine works. Do not use tobramycin inhalation solution if it is cloudy, has particles in the solution, or if it has been stored at room temperature for more than 28 days. Throw the applicable ampule(s) away in your household trash and get a new ampule. Keep KITABIS PAK and all medicines out of the reach of children. This Patient Information and Instructions for Use have been approved by the U.S. Food and Drug Administration. Revised: 4/23 Additional Information PARI LC PLUS ® Reusable Nebulizer: 1-800-327-8632 DeVilbiss ® Pulmo-Aide ® Air Compressor: 1-800-338-1988 KITABIS PAK: 1-844-KITABIS (548-2247) Manufactured by: Catalent Pharma Solutions, LLC Woodstock, IL 60098 Distributed by: PARI Respiratory Equipment, Inc. 2412 PARI Way, Midlothian, VA 23112 850D5601 Rev. E 4/2023 © 2013-2023 PulmoFlow, Inc. All rights reserved. Figure A Figure B Figure C Figure D Figure E Figure F Figure G Figure H Figure I Figure J Figure K Figure L Figure M Figure N Figures O - P Figure Q Pari logo

14 CLINICAL STUDIES Two identically designed, double-blind, randomized, placebo-controlled, parallel group, 24-week clinical studies (Study 1 and Study 2) at a total of 69 cystic fibrosis centers in the United States were conducted in cystic fibrosis patients with P. aeruginosa with tobramycin inhalation solution. Subjects who were less than 6 years of age, had a baseline creatinine of > 2 mg/dL, or had B. cepacia isolated from sputum were excluded. All subjects had baseline FEV 1 % predicted between 25% and 75%. In these clinical studies, 258 patients received tobramycin inhalation solution therapy on an outpatient basis (see Table 2 ) using a PARI LC PLUS nebulizer along with a DeVilbiss Pulmo-Aide compressor. Table 2: Dosing Regimens in Clinical Studies Cycle 1 Cycle 2 Cycle 3 28 days 28 days 28 days 28 days 28 days 28 days TOBRAMYCIN Inhalation Solution regimen n=258 TOBRAMYCIN Inhalation Solution 300 mg twice daily No drug TOBRAMYCIN Inhalation Solution 300 mg twice daily No drug TOBRAMYCIN Inhalation Solution 300 mg twice daily No drug Placebo regimen n=262 Placebo twice daily Placebo twice daily Placebo twice daily All patients received either tobramycin inhalation solution or placebo (saline with 1.25 mg quinine for flavoring) in addition to standard treatment recommended for cystic fibrosis patients, which included oral and parenteral anti-pseudomonal therapy, Beta 2-agonists, cromolyn, inhaled steroids, and airway clearance techniques. In addition, approximately 77% of patients were concurrently treated with dornase alfa. In each study, tobramycin inhalation solution-treated patients experienced significant improvement in pulmonary function. Improvement was demonstrated in the tobramycin inhalation solution group in Study 1 by an average increase in FEV 1 % predicted of about 11% relative to baseline (Week 0) during 24 weeks compared to no average change in placebo patients. In Study 2, tobramycin inhalation solution-treated patients had an average increase of about 7% compared to an average decrease of about 1% in placebo patients. Figure 1 shows the average relative change in FEV 1 % predicted over 24 weeks for both studies. Figure 1: Relative Change From Baseline in FEV 1 % Predicted In each study, tobramycin inhalation solution therapy resulted in a significant reduction in the number of P. aeruginosa colony forming units (CFUs) in sputum during the on-drug periods. Sputum bacterial density returned to baseline during the off-drug periods. Reductions in sputum bacterial density were smaller in each successive cycle. (see Figure 2 ). Figure 2: Absolute Change From Baseline in Log 10 CFUs Patients treated with tobramycin inhalation solution were hospitalized for an average of 5.1 days compared to 8.1 days for placebo patients. Patients treated with tobramycin inhalation solution required an average of 9.6 days of parenteral anti-pseudomonal antibiotic treatment compared to 14.1 days for placebo patients. During the 6 months of treatment, 40% of tobramycin inhalation solution patients and 53% of placebo patients were treated with parenteral anti-pseudomonal antibiotics. The relationship between in vitro susceptibility test results and clinical outcome with tobramycin inhalation solution therapy is not clear. However, 4 tobramycin inhalation solution patients who began the clinical trial with P. aeruginosa isolates having MIC values ≥ 128 μg/mL did not experience an improvement in FEV 1 or a decrease in sputum bacterial density. Figure 1 Figure 2

15 REFERENCES Neu HC. Tobramycin: an overview. [Review]. J Infect Dis 1976; Suppl 134:S3-19. Weber A, Smith A, Williams-Warren J et al. Nebulizer delivery of tobramycin to the lower respiratory tract. Pediatr Pulmonol 1994; 17 (5):331-9. Bryan LE. Aminoglycoside resistance. Bryan LE, Ed. Antimicrobial drug resistance. Orlando, FL: Academic Press, 1984: 241-77. Clinical and Laboratory Standards Institute (CLSI). Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria that Grow Aerobically; Approved Standard - Ninth Edition . CLSI document M07-A9, Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2012. Clinical and Laboratory Standards Institute (CLSI). Performance Standards for Antimicrobial Disk Diffusion Susceptibility Tests; Approved Standard – Eleventh Edition. CLSI document M02-A11, Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2012. Clinical and Laboratory Standards Institute (CLSI). Performance Standards for Antimicrobial Susceptibility Testing; Twenty-fourth Informational Supplement , CLSI document M100-S24, Clinical and Laboratory Standards Institute, 950 West Valley Road, Suite 2500, Wayne, Pennsylvania 19087, USA, 2014.

8.5 Geriatric Use Clinical studies of tobramycin inhalation solution did not include patients aged 65 years and over. Tobramycin is known to be substantially excreted by the kidney, and the risk of adverse reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, it may be useful to monitor renal function [see Warnings and Precautions ( 5.3 )].

8.4 Pediatric Use The safety and efficacy of tobramycin inhalation solution have not been studied in pediatric patients under 6 years of age.

8.1 Pregnancy Risk Summary Aminoglycosides can cause fetal harm. Published literature reports that use of streptomycin, an aminoglycoside, can cause total, irreversible, bilateral congenital deafness when administered to a pregnant woman [Warnings and Precautions ( 5.5 )] . Although there are no available data on KITABIS PAK use in pregnant women to inform a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes, systemic absorption of tobramycin following inhaled administration is expected to be minimal [see Clinical Pharmacology ( 12.3 )] . There are risks to the mother associated with cystic fibrosis in pregnancy (see Clinical Considerations ) . In animal reproduction studies with subcutaneous administration of tobramycin in pregnant rats and rabbits during organogenesis there were no adverse developmental outcomes; however, ototoxicity was not evaluated in the offspring from these studies ( see Data ). Advise pregnant women of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated populations are unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk Cystic fibrosis may increase the risk for preterm delivery. Data Animal Data No reproductive toxicity studies have been conducted with tobramycin inhalation solution. However, subcutaneous administration of tobramycin at doses of up to 100 (rat) or 20 (rabbit) mg/kg/day during organogenesis was not associated with adverse developmental outcomes. Subcutaneous doses of tobramycin ≥40 mg/kg/day were severely maternally toxic to rabbits and precluded the evaluation of adverse developmental outcomes. Ototoxicity was not evaluated in offspring during non-clinical reproductive toxicity studies with tobramycin.

8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy Risk Summary Aminoglycosides can cause fetal harm. Published literature reports that use of streptomycin, an aminoglycoside, can cause total, irreversible, bilateral congenital deafness when administered to a pregnant woman [Warnings and Precautions ( 5.5 )] . Although there are no available data on KITABIS PAK use in pregnant women to inform a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes, systemic absorption of tobramycin following inhaled administration is expected to be minimal [see Clinical Pharmacology ( 12.3 )] . There are risks to the mother associated with cystic fibrosis in pregnancy (see Clinical Considerations ) . In animal reproduction studies with subcutaneous administration of tobramycin in pregnant rats and rabbits during organogenesis there were no adverse developmental outcomes; however, ototoxicity was not evaluated in the offspring from these studies ( see Data ). Advise pregnant women of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated populations are unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk Cystic fibrosis may increase the risk for preterm delivery. Data Animal Data No reproductive toxicity studies have been conducted with tobramycin inhalation solution. However, subcutaneous administration of tobramycin at doses of up to 100 (rat) or 20 (rabbit) mg/kg/day during organogenesis was not associated with adverse developmental outcomes. Subcutaneous doses of tobramycin ≥40 mg/kg/day were severely maternally toxic to rabbits and precluded the evaluation of adverse developmental outcomes. Ototoxicity was not evaluated in offspring during non-clinical reproductive toxicity studies with tobramycin. 8.2 Lactation Risk Summary There are no data on the presence of tobramycin inhalation solution in either human or animal milk, the effects on the breastfed infant, or the effects on milk production. Limited published data on other formulations of tobramycin in lactating women indicate that tobramycin is present in human milk. However, systemic absorption of tobramycin following inhaled administration is expected to be minimal [see Clinical Pharmacology ( 12.3 )] . Tobramycin may cause alteration in the intestinal flora of the breastfeeding infant (see Clinical Considerations ) . The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for KITABIS PAK and any potential adverse effects on the breastfed infant from KITABIS PAK or from the underlying maternal condition. Clinical Considerations Tobramycin may cause intestinal flora alteration. Advise a woman to monitor the breastfed infant for loose or bloody stools and candidiasis (thrush, diaper rash). 8.4 Pediatric Use The safety and efficacy of tobramycin inhalation solution have not been studied in pediatric patients under 6 years of age. 8.5 Geriatric Use Clinical studies of tobramycin inhalation solution did not include patients aged 65 years and over. Tobramycin is known to be substantially excreted by the kidney, and the risk of adverse reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, it may be useful to monitor renal function [see Warnings and Precautions ( 5.3 )].

16 HOW SUPPLIED / STORAGE AND HANDLING 16.1 How Supplied KITABIS PAK co-packaged kit (NDC 70644-899-99) is available in cartons containing one reusable PARI LC PLUS nebulizer (Model No.: 022B81-TA) and 14 tobramycin inhalation solution pouches. Each pouch contains four 300 mg/5 ml ampules of tobramycin inhalation solution for a total of 56 ampules in each carton. Each carton constitutes a 28 day supply. 16.2 Storage Tobramycin inhalation solution should be stored under refrigeration at 2-8°C/36-46°F. Upon removal from the refrigerator, or if refrigeration is unavailable, tobramycin inhalation solution pouches (opened or unopened) may be stored at room temperature (up to 25°C/77°F) for up to 28 days. Tobramycin inhalation solution should not be used beyond the expiration date stamped on the ampule when stored under refrigeration (2-8°C/36-46°F) or beyond 28 days when stored at room temperature (25°C/77°F). Tobramycin inhalation solution ampules should not be exposed to intense light. The solution in the ampule is slightly yellow, but may darken with age if not stored in the refrigerator; however, the color change does not indicate any change in the quality of the product as long as it is stored within the recommended storage conditions.

16.2 Storage Tobramycin inhalation solution should be stored under refrigeration at 2-8°C/36-46°F. Upon removal from the refrigerator, or if refrigeration is unavailable, tobramycin inhalation solution pouches (opened or unopened) may be stored at room temperature (up to 25°C/77°F) for up to 28 days. Tobramycin inhalation solution should not be used beyond the expiration date stamped on the ampule when stored under refrigeration (2-8°C/36-46°F) or beyond 28 days when stored at room temperature (25°C/77°F). Tobramycin inhalation solution ampules should not be exposed to intense light. The solution in the ampule is slightly yellow, but may darken with age if not stored in the refrigerator; however, the color change does not indicate any change in the quality of the product as long as it is stored within the recommended storage conditions.