LYMPHIR

1 INDICATIONS AND USAGE LYMPHIR is indicated for the treatment of adult patients with relapsed or refractory Stage I-III cutaneous T-cell lymphoma (CTCL) after at least one prior systemic therapy. LYMPHIR is an IL2-receptor-directed cytotoxin indicated for the treatment of adult patients with relapsed or refractory Stage I-III cutaneous T-cell lymphoma (CTCL) after at least one prior systemic therapy. ( 1 )

2 DOSAGE AND ADMINISTRATION Delay start of treatment cycle if serum albumin level is below 3 g/dL. ( 2.1 ) The recommended dosage of LYMPHIR is 9 mcg/kg/day actual body weight administered as an intravenous infusion on Days 1 through 5 of a 21-day cycle. ( 2.2 ) Administer premedication as recommended. ( 2.3 ) See full prescribing information for preparation and administration instructions. ( 2.5 ) 2.1 Important Dosing Instructions Prior to starting each treatment cycle, assess hepatic and renal function. If serum albumin is less than 3 g/dL, delay administration of LYMPHIR until serum albumin is greater than or equal to 3 g/dL [see Warnings and Precautions ( 5.1 )] . 2.2 Recommended Dosage The recommended dosage of LYMPHIR is 9 mcg/kg/day actual body weight administered as an intravenous infusion over 60 minutes on Days 1 through 5 of a 21-day treatment cycle. Administer LYMPHIR until disease progression or unacceptable toxicity. 2.3 Recommended Premedications Administer premedications prior to starting a LYMPHIR infusion in Cycles 1 through 3, as outlined in Table 1, to reduce the risk of infusion-related reactions [see Warnings and Precautions ( 5.3 )] . Table 1. Premedication to be Administered to Patients Prior to LYMPHIR Infusion Treatment Cycle Premedication Dosage Administration Cycles 1-3 (optional thereafter) Antipyretic Oral acetaminophen 650 mg or per local institutional guidelines At least 30 minutes prior to infusion Antihistamine Diphenhydramine 25 mg intravenously or other antihistamine per local institutional guidelines At least 30 minutes prior to infusion Antiemetic Per institutional guidelines At least 30 minutes prior to infusion Hydration 250 to 500 mL 0.9% Sodium Chloride Injection intravenously (or other amount of fluid considered to be most appropriate for the subject’s condition) At least 30 minutes prior to infusion If patients experience a Grade 2 or higher infusion reaction, premedicate at least 30 minutes prior to each subsequent infusion with a systemic steroid such as dexamethasone 4 mg (or equivalent) via slow intravenous push, for at least 3 cycles. 2.4 Dosage Modifications for Adverse Reactions Dosage modifications for adverse reactions with LYMPHIR are shown in Table 2 below. Table 2: Recommended Dosage Modifications for Adverse Reactions Adverse Reaction Severity* Dosage Modification Capillary leak syndrome (CLS) [see Warnings and Precautions ( 5.1 )] Grade 2 Withhold LYMPHIR until CLS resolves to Grade 1. Grade 3 Withhold LYMPHIR and provide supportive care until CLS resolves to Grade 1. Resume LYMPHIR at 50% dose. Consider steroid premedication for subsequent infusions. Permanently discontinue upon recurrence. Grade 4 Permanently discontinue LYMPHIR. Visual impairment [see Warnings and Precautions ( 5.2 )] Grade 1 or 2 Consider withholding or discontinuing LYMPHIR as appropriate. Refer for ophthalmic evaluation. Grade 3 or 4 Withhold LYMPHIR until resolved to Grade 1 or baseline. Refer for ophthalmic evaluation. Permanently discontinue LYMPHIR if impairment does not resolve to Grade 1 or baseline. Infusion-related reactions [see Warnings and Precautions ( 5.3 )] Grade 2 or 3 Interrupt infusion and manage signs and symptoms. Administer steroid premedication prior to the subsequent doses of LYMPHIR [see Dosage and Administration ( 2.3 )] Continue steroid premedication for each dose in the next 3 cycles and optional thereafter [see Dosage and Administration ( 2.3 )] Grade 4 or Recurrent Grade 3 Permanently discontinue LYMPHIR. Hepatotoxicity [see Warnings and Precautions ( 5.4 )] Grade 2: ALT/AST 3 to 5 x upper limit of normal (ULN) Maintain LYMPHIR dose Monitor at least weekly until return to < 3 x ULN Grade 3: ALT/AST > 5 to 20 x ULN Withhold LYMPHIR and monitor at least weekly until return to < 3 x ULN Resume LYMPHIR at same dose (first occurrence) or at a reduced dose (50%) for subsequent occurrence Grade 4: ALT/AST > 20 x ULN Permanently discontinue LYMPHIR Other Adverse Reactions [see …

5 WARNINGS AND PRECAUTIONS Visual Impairment: Monitor and evaluate for visual impairment throughout treatment. Withhold LYMPHIR until visual impairment resolves or permanently discontinue based on severity. ( 5.2 ) Infusion-Related Reactions: Monitor patients closely during infusions. Interrupt or discontinue for infusion-related reactions based on severity. ( 5.3 ) Hepatotoxicity: Monitor liver enzymes and bilirubin at baseline and during treatment as clinically indicated. ( 5.4 ) Embryo-Fetal Toxicity: Can cause fetal harm. Advise females of reproductive potential of the potential risk to a fetus and to use effective contraception. ( 5.5 , 8.1 , 8.3 ) 5.1 Capillary Leak Syndrome LYMPHIR can cause capillary leak syndrome (CLS), including life-threatening or fatal reactions. CLS was defined in the clinical trials as the occurrence of at least 2 of the following symptoms at any time during LYMPHIR therapy: hypotension, edema, and serum albumin <3 g/dL. These symptoms were not required to occur simultaneously to be characterized as capillary leak syndrome. As defined, CLS occurred in 27% of patients in the pooled population across 3 clinical trials, including 8% with Grade 3. There was one (0.8%) fatal occurrence of CLS. Of the patients with CLS, 22% had recurrence. The majority of CLS events (81%) occurred within the first 2 cycles of treatment. The median time to onset from Cycle 1, Day 1 was 6.5 days (range: 1 to 77), the median duration of CLS was 14 days (range: 2 to 40), and 75% of patients had resolution. The most common symptoms included edema, hypoalbuminemia, and hypotension. Pleural effusion, pericardial effusion, and dehydration also occurred. Regularly assess patients for weight gain, new onset or worsening of edema, dyspnea, and hypotension (including orthostatic changes). Monitor serum albumin levels prior to the initiation of each cycle of therapy and more often as clinically indicated. Withhold, reduce dose, or permanently discontinue based on severity. If LYMPHIR is withheld, resume LYMPHIR following resolution of CLS and when serum albumin is greater than or equal to 3 g/dL [see Dosage and Administration ( 2.1 and 2.4 )] . 5.2 Visual Impairment LYMPHIR can cause serious visual impairment, including changes in visual acuity and color vision. In the pooled population across 3 clinical trials, visual impairment occurred in 9%, with Grade 1 in 8% and Grade 2 in 1%. The most commonly reported symptom was blurred vision. Of the patients with visual impairment, 67% had resolution of their visual impairment. Perform baseline ophthalmic examination and monitor as clinically indicated. If patients experience symptoms of visual impairment, such as changes in visual acuity, changes in color vision, or blurred vision, refer for ophthalmologic evaluation. Withhold LYMPHIR until visual impairment resolves or permanently discontinue based on severity [see Dosage and Administration ( 2.4 )] . 5. 3 Infusion-Related Reactions LYMPHIR can cause serious infusion-related reactions. Infusion-related reactions were reported in 69% of patients in the pooled population across 3 clinical trials of patients who received LYMPHIR, with Grade 3 infusion-related reactions in 3.4% [see Adverse Reactions ( 6.1 )] . Eighty-three percent of infusion-related reactions occurred in Cycles 1 and 2. The most common symptoms included nausea, fatigue, chills, musculoskeletal pain, vomiting, fever, and arthralgia. Premedicate patients for the first three cycles prior to starting a LYMPHIR infusion [see Dosage and Administration ( 2.3 )] . Monitor patients frequently during infusion. For Grade 2 or higher infusion reactions, premedicate at least 30 minutes prior to each subsequent infusion with a systemic steroid for at least 3 cycles [see Dosage and Administration ( 2.3 )] . Interrupt or discontinue LYMPHIR based on severity [see Dosage and Administration ( 2.4 )]. Institute appropriate medical management. 5. 4 Hepatotoxicity LYMPHIR can cause hepatotox…

4 CONTRAINDICATIONS None. None. ( 4 )

8.1 Pregnancy Risk Summary Based on its mechanism of action, LYMPHIR can cause fetal harm when administered to a pregnant woman [see Clinical Pharmacology ( 12.1 )]. There are no available data on the use of LYMPHIR in pregnant women to evaluate for a drug-associated risk. No animal reproductive and developmental toxicity studies have been conducted with denileukin diftitox. Denileukin diftitox-cxdl causes depletion of regulatory T lymphocytes (Treg), immune activation, and capillary leak syndrome, compromising pregnancy maintenance. Advise pregnant women of the potential risk to a fetus. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies are 2-4% and 15-20%, respectively.

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the label: Capillary Leak Syndrome [see Warnings and Precautions ( 5.1 )] Visual Impairment [see Warnings and Precautions ( 5.2 )] Infusion-Related Reactions [see Warnings and Precautions ( 5.3 )] Hepatotoxicity [see Warnings and Precautions ( 5.4 )] The most common adverse reactions (≥20%), including laboratory abnormalities, are increased transaminases, albumin decreased, nausea, edema, hemoglobin decreased, fatigue, musculoskeletal pain, rash, chills, constipation, pyrexia, and capillary leak syndrome. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Citius Oncology, Inc. at 1-844-459-6744 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. The pooled safety population described in the WARNINGS AND PRECAUTIONS reflect exposure to LYMPHIR as a single agent in 119 patients with CTCL across 3 clinical trials. Patients received treatment with LYMPHIR as an intravenous infusion at 9 mcg/kg daily from Day 1 through Day 5 of each 21-day cycle until disease progression or unacceptable toxicity. Among 119 patients who received LYMPHIR the median number of cycles received was 5 (range: 1 to 42), with 13% exposed for 6 months or longer. In this pooled safety population, the most common (≥ 20%) adverse reactions, including laboratory abnormalities, were increased transaminases (70%), albumin decreased (53%), nausea (40%), edema (35%), hemoglobin decreased (34%), fatigue (30%), musculoskeletal pain (26%), rash (23%), chills (22%), constipation (22%), pyrexia (21%), and capillary leak syndrome (20%). Relapsed or Refractory Stage I-III CTCL Study 302 The safety of LYMPHIR was evaluated in Study 302, an open-label, single-arm, multicenter trial that included 69 patients with relapsed or refractory Stage I-III CTCL [see Clinical Studies ( 14 )] . Patients received treatment with LYMPHIR 9 mcg/kg daily from Day 1 through Day 5 of each 21-day cycle. Treatment was administered until disease progression or unacceptable toxicity. The median number of LYMPHIR cycles was 6 (range: 1 to 42). The median age of patients was 64 years (range: 28 to 87 years), 49% were 65 years of age or older, 65% were men, 72% were White, 19% were Black or African American, 1.4% were Asian, and 14% were Hispanic or Latino. Serious adverse reactions occurred in 38% of patients who received LYMPHIR. Serious adverse reactions in > 2% of patients included capillary leak syndrome (10%), infusion-related reaction (9%), sepsis (7%), skin infection (2.9%), pyrexia (2.9%), and rash (2.9%). Permanent discontinuation of LYMPHIR due to an adverse reaction occurred in 12% of patients. Adverse reactions resulting in permanent discontinuation of LYMPHIR included capillary leak syndrome, infusion-related reaction, renal insufficiency, respiratory failure, and sepsis. Dosage interruptions of LYMPHIR due to an adverse reaction occurred in 38% of patients. Adverse reactions requiring dosage interruption of LYMPHIR included capillary leak syndrome, infusion-related reaction, weight increase, nausea, and tachycardia. Table 3 summarizes the adverse reactions in Study 302. Table 3: Adverse Reactions (≥ 10%) in Patients with Relapsed or Refractory Stage I-III CTCL Who Received LYMPHIR in Study 302 Adverse Reaction LYMPHIR N=69 All Grades (%) Grade 3 or 4 (%) Gastrointestinal disorders Nausea 43 1.4 # Diarrhea 19 0 Vomiting 13 0 Constipation 12 0 General disorders and administration site conditions Fatigue a 38 0 Edema b 33 1.4 Chills 27 1.4 Pyrexia 16 1.4 Musculoskeletal and connective tissue disorders Musculoskeletal pain c 27 2.9 Arthralgia 12 0 Nervous system disorders Headache d 25 0 Dizzin…