POSFREA

POSFREA Injection contains palonosetron as palonosetron HCl, an antiemetic and antinauseant agent. It is a serotonin-3 (5-HT 3 ) receptor antagonist with a strong binding affinity for this receptor. Chemically, palonosetron HCl is: (3a S )-2-[ (S)- 1-Azabicyclo [2.2.2]oct 3-yl]-2,3,3a,4,5,6-hexahydro-1-oxo-1 H benz[ de ]isoquinoline hydrochloride. The empirical formula is C 19 H 24 N 2 O . HCl, with a molecular weight of 332.87. Palonosetron HCl exists as a single isomer and has the following structural formula: Palonosetron HCl is a white to off-white crystalline powder. It is freely soluble in water, soluble in propylene glycol, and slightly soluble in ethanol and 2-propanol. POSFREA Injection is a sterile, clear, colorless, non-pyrogenic, isotonic, buffered solution for intravenous administration. POSFREA Injection is available as a 5 mL or 1.5 mL single-dose vial. Each mL of aqueous solution contains 0.05 mg palonosetron (equivalent to 0.056 mg palonosetron hydrochloride). Each mL also contains 41.5 mg mannitol, 3.0 mg sodium acetate trihydrate, and water for injection (q.s. to 1.0 mL). The pH of the solution in the 5 mL and 1.5 mL vials is 4.5 to 5.5. Hydrochloric acid or sodium hydroxide may have been added to adjust pH. Image

POSFREA is indicated in adults for prevention of: acute and delayed nausea and vomiting associated with initial and repeat courses of moderately emetogenic cancer chemotherapy (MEC). acute nausea and vomiting associated with initial and repeat courses highly emetogenic cancer chemotherapy (HEC). postoperative nausea and vomiting (PONV) for up to 24 hours following surgery. Efficacy beyond 24 hours has not been demonstrated. As with other antiemetics, routine prophylaxis is not recommended in patients in whom there is little expectation that nausea and/or vomiting will occur postoperatively. In patients where nausea and vomiting must be avoided during the postoperative period, POSFREA is recommended even where the incidence of postoperative nausea and/or vomiting is low. POSFREA is indicated in pediatric patients 1 month to less than 17 years of age for prevention of: acute nausea and vomiting associated with initial and repeat courses of emetogenic cancer chemotherapy, including highly emetogenic cancer chemotherapy. POSFREA is a serotonin-3 (5-HT 3 ) receptor antagonist indicated in: Adults for prevention of : acute and delayed nausea and vomiting associated with initial and repeat courses of moderately emetogenic cancer chemotherapy (MEC). ( 1 ) acute nausea and vomiting associated with initial and repeat courses of highly emetogenic cancer chemotherapy (HEC). ( 1 ) postoperative nausea and vomiting (PONV) for up to 24 hours following surgery. Efficacy beyond 24 hours has not been demonstrated ( 1 ) Pediatric patients 1 month to less than 17 years of age for prevention of: acute nausea and vomiting associated with initial and repeat courses of emetogenic cancer chemotherapy, including highly emetogenic cancer chemotherapy (HEC). ( 1 )

Chemotherapy-Induced Nausea and Vomiting (CINV) ( 2.1 ) *Note different dosing units in pediatrics Age Dose* Infusion Time Adults 0.25 mg as a single dose Infuse over 30 seconds beginning approximately 30 minutes before the start of chemotherapy Pediatrics (1 month to less than 17 years) 20 micrograms per kilogram (maximum 1.5 mg) as a single dose Infuse over 15 minutes beginning approximately 30 minutes before the start of chemotherapy Postoperative Nausea and Vomiting ( 2.1 ) The recommended adult dosage is 0.075 mg as a single intravenous dose administered over 10 seconds immediately before the induction of anesthesia. 2.1 Recommended Dosage Prevention of Chemotherapy-Induced Nausea and Vomiting (CINV) The recommended dosage of POSFREA for prevention of nausea and vomiting associated with HEC and MEC in adults and associated with emetogenic chemotherapy, including HEC in pediatric patients 1 month to less than 17 years of age is shown in Table 1. Table 1: Recommended Dosage of POSFREA for the Prevention of Nausea and Vomiting Associated with Chemotherapy in Adults and Pediatric Patients 1 Month to Less than 17 Years *Note different dosing units in pediatrics Age Dose* Infusion Time Adults 0.25 mg as a single dose Infuse over 30 seconds beginning approximately 30 minutes before the start of chemotherapy Pediatrics (1 month to less than 17 years) 20 micrograms per kilogram (max 1.5 mg) as a single dose Infuse over 15 minutes beginning approximately 30 minutes before the start of chemotherapy Postoperative Nausea and Vomiting The recommended dosage of POSFREA in adults for PONV is 0.075 mg administered as a single intravenous dose over 10 seconds immediately before the induction of anesthesia. 2.2 Instructions for Intravenous Administration POSFREA is supplied ready for intravenous administration at a concentration of 0.05 mg/mL (50 mcg/mL). Do not mix POSFREA with other drugs. Flush the infusion line with 0.9% Sodium Chloride Injection before and after administration of POSFREA. Inspect POSFREA visually for particulate matter and discoloration before administration. Discard unused portion.

POSFREA is contraindicated in patients known to have hypersensitivity to palonosetron [see Warnings and Precautions (5.1) ] . Hypersensitivity to palonosetron or any of its components. ( 4 )

Serious or otherwise clinically significant adverse reactions reported in other sections of labeling: Hypersensitivity Reactions [see Warnings and Precautions (5.1) ] Serotonin Syndrome [see Warnings and Precautions (5.2) ] Most common adverse reactions in chemotherapy-induced nausea and vomiting in adults (≥5%) are: headache and constipation ( 6.1 ) postoperative nausea and vomiting (≥ 2%) are: QT prolongation, bradycardia, headache, and constipation ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Avyxa Pharma, LLC at 1-888-520-0954 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatc h. 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 safety of POSFREA has been established from adequate and well-controlled studies of another intravenous formulation of palonosetron [see Clinical Studies (14) ] . Below is a display of the adverse reactions of palonosetron in these adequate and well-controlled studies. Chemotherapy-Induced Nausea and Vomiting (CINV) Adults In double-blind randomized clinical trials for the prevention of nausea and vomiting induced by MEC or HEC, 1374 adult patients received a single dose of palonosetron, ondansetron (Studies 1 and 3) or dolasetron (Study 2) administered intravenously 30 minutes prior to chemotherapy [see Clinical Studies (14.1) ] . Adverse reactions were similar in frequency and severity in all three treatment groups. Common adverse reactions reported in at least 2% of patients in these trials are shown in Table 2. Table 2: Common Adverse Reactions* in Adults with Receiving MEC (Studies 1 and 2) or HEC (Study 3) *Reported in at least 2% of patients in any treatment group Adverse Reaction Palonosetron 0.25 mg intravenously (N=633) Ondansetron 32 mg intravenously (N=410) Dolasetron 100 mg intravenously (N=194) Headache 9% 8% 16% Constipation 5% 2% 6% Diarrhea 1% 2% 2% Dizziness 1% 2% 2% Fatigue < 1% 1% 2% Abdominal Pain < 1% < 1% 2% Insomnia < 1% 1% 2% Less common adverse reactions, reported in 1% or less of patients in any treatment group, in Studies 1, 2 and 3 were: Cardiac disorders : non-sustained tachycardia, bradycardia, myocardial ischemia, extrasystoles, sinus tachycardia, sinus arrhythmia, supraventricular extrasystoles. Skin & subcutaneous tissue disorders : allergic dermatitis, rash. Ear &labyrinth disorders : motion sickness, tinnitus. Gastrointestinal disorders : diarrhea, dyspepsia, abdominal pain, dry mouth, hiccups and flatulence. General disorders and administration site conditions : weakness, fatigue, fever, hot flash, flu-like syndrome. Investigations : QT prolongation, transient, asymptomatic increases in AST and/or ALT and bilirubin and these changes occurred predominantly in patients receiving HEC. Metabolism and nutrition disorders : hyperkalemia, electrolyte fluctuations, hyperglycemia, metabolic acidosis, appetite decrease, anorexia. Musculoskeletal and connective tissue disorders : arthralgia. Nervous System disorders : dizziness, somnolence, insomnia, hypersomnia, paresthesia. Psychiatric disorders : anxiety, euphoric mood. Renal and urinary disorders : urinary retention, glycosuria. Vascular disorders : vein discoloration, vein distention, hypotension, hypertension. In other studies, two subjects experienced severe constipation following a single dose of approximately 0.75 mg (three times the recommended dose). Pediatrics Aged 2 Months to 17 Years In a pediatric clinical trial, 163 pediatric cancer patients with a mean age of eight years received a single 20 mcg/kg (maximum 1.5 mg) intravenous infusion of palonosetron 30 minutes before beginning the first cycle of emetogenic chemotherapy [see Clinical Studies (14.2) ] . Adverse reactions were evaluated in pediatric patients receiving palonosetron for up to four chemotherapy cycles. The following adverse reactions were reported in less than 1% of palonosetron-treated patients: Nervous System disorders : headache, dizziness, dyskinesia. General disorders and administration site conditions : infusion site pain. Skin and subcutaneous tissue disorders : allergic dermatitis, skin disorder. Postoperative Nausea and Vomiting (PONV) The most common adverse reactions reported in at least 2% of adults receiving palonosetron 0.075 mg intravenously immediately before induction of anesthesia in three randomized placebo-controlled trials [see Clinical Studies (14.3) ] are shown in Table 3. Rates of adverse reactions between palonosetron and placebo groups were similar. Some events are known to be associated with, or may be exacerbated by, concomitant perioperative and intraoperative medications administered in this surgical population. A thorough QT/QTc study demonstrated palonosetron does not prolong the QT interval to any clinically relevant extent [see Clinical Pharmacology (12.2) ] . Table 3: Common Adverse Reactions* in Trials of Adults with Postoperative Nausea and Vomiting *Reported in at least 2% of patients in any treatment group Adverse Reaction Palonosetron 0.075 mg intravenously (N=336) Placebo (N=369) Electrocardiogram QT prolongation 5% 3% Bradycardia 4% 4% Headache 3% 4% Constipation 2% 3% Less common adverse reactions, reported in 1% or less of patients, in these PONV clinical trials were: Cardiac disorders : sinus bradycardia, tachycardia, arrhythmia, ventricular extrasystoles. The frequency of these adverse effects did not appear to be different from placebo. Skin and subcutaneous tissue disorders : pruritus. Gastrointestinal disorders : flatulence, dry mouth, upper abdominal pain, salivary hypersecretion, dyspepsia, diarrhea, intestinal hypomotility. General disorders and administration site conditions : chills, generalized edema. Investigations : increases in AST and/or ALT, hepatic enzyme increased, QTc prolongation, blood pressure decreased, platelet count decreased, T wave amplitude decreased. Metabolism and nutrition disorders : hypokalemia, anorexia. Nervous System disorders : dizziness. Respiratory, thoracic and mediastinal disorders : hypoventilation, laryngospasm. Renal and urinary disorders : Urinary retention. Vascular disorders : Hypotension, Hypertension. 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of palonosetron. 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. Hypersensitivity reactions : including dyspnea, bronchospasm, swelling/edema, erythema, pruritus, rash, urticaria, anaphylaxis and anaphylactic shock [see Warnings and Precautions (5.1) ] Injection site reactions : including burning, induration, discomfort and pain

Serotonergic Drugs: Monitor for serotonin syndrome; if symptoms occur, discontinue POSFREA and initiate supportive treatment ( 7.1 ) 7.1 Serotonergic Drugs Serotonin syndrome (including altered mental status, autonomic instability, and neuromuscular symptoms) has been described following the concomitant use of 5-HT 3 receptor antagonists and other serotonergic drugs, including selective serotonin reuptake inhibitors (SSRIs) and serotonin and noradrenaline reuptake inhibitors (SNRIs). Monitor for the emergence of serotonin syndrome. If symptoms occur, discontinue POSFREA and initiate supportive treatment [see Warnings and Precautions (5.2) ] .