Spesolimab-Sbzo

1 INDICATIONS AND USAGE SPEVIGO is indicated for the treatment of generalized pustular psoriasis (GPP) in adults and pediatric patients 12 years of age and older and weighing at least 40 kg. SPEVIGO is an interleukin-36 receptor antagonist indicated for the treatment of generalized pustular psoriasis (GPP) in adults and pediatric patients 12 years of age and older and weighing at least 40 kg. ( 1 )

2 DOSAGE AND ADMINISTRATION Subcutaneous Dosage for Treatment of GPP When Not Experiencing a Flare Administer a subcutaneous loading dose of 600 mg, followed by 300 mg subcutaneously 4 weeks later and every 4 weeks thereafter. ( 2.3 ) Subcutaneous Use After Intravenous SPEVIGO for Treatment of GPP Flare: Four weeks after treatment with intravenous SPEVIGO, initiate or reinitiate subcutaneous SPEVIGO at a dose of 300 mg administered every 4 weeks. A loading dose is not required following treatment of a GPP flare with intravenous SPEVIGO. ( 2.3 ) See full prescribing information for preparation and administration instructions. ( 2.2 , 2.5 ) Intravenous Dosage for Treatment of GPP Flare Must be diluted before intravenous use. Administer as a single 900 mg dose by intravenous infusion over 90 minutes. If flare symptoms persist, may administer an additional intravenous 900 mg dose one week after the initial dose. ( 2.4 ) See full prescribing information for preparation and administration instructions and storage of the diluted solution. ( 2.2 , 2.5 ) 2.1 Testing and Procedures Prior to Treatment Initiation Evaluate patients for active or latent tuberculosis (TB) infection. SPEVIGO initiation is not recommended in patients with active TB infection. Consider initiating treatment of latent TB prior to initiation of SPEVIGO [see Warnings and Precautions (5.2) ] . Complete all age-appropriate vaccinations according to current immunization guidelines prior to initiating SPEVIGO for treatment of GPP [see Warnings and Precautions (5.4) ] . 2.2 Important Administration Information Subcutaneous Use for Treatment of GPP When Not Experiencing a Flare SPEVIGO prefilled syringes are for subcutaneous use for treatment of GPP when not experiencing a flare. When using SPEVIGO 300 mg/2 mL prefilled syringe: If the healthcare professional determines that it is appropriate, a patient 12 years of age or older may self-inject or the caregiver may administer the loading dose and the subsequent doses of SPEVIGO after proper training in subcutaneous injection technique. In pediatric patients 12 years of age and older, administer SPEVIGO under the supervision of an adult. When using SPEVIGO 150 mg/mL prefilled syringe: If required, the 600 mg subcutaneous loading dose of SPEVIGO is to be administered by a healthcare professional [see Dosage and Administration (2.3) ] . For subsequent 300 mg doses, if the healthcare professional determines that it is appropriate, a patient 12 years of age or older may self-inject or the caregiver may administer SPEVIGO after proper training in subcutaneous injection technique. In pediatric patients 12 years of age and older, administer SPEVIGO under the supervision of an adult. If a patient experiences a GPP flare while receiving subcutaneous SPEVIGO, the GPP flare may be treated with intravenous SPEVIGO [see Dosage and Administration (2.4) ] . Intravenous Use for Treatment of GPP Flare SPEVIGO vials are for intravenous use for treatment of GPP flare. Intravenous infusion of SPEVIGO is only to be administered by a healthcare professional in a healthcare setting. Prepare SPEVIGO intravenous infusion by diluting SPEVIGO single-dose vials [see Dosage and Administration (2.5) ] . Do not mix SPEVIGO with other medicinal products. 2.3 Recommended Subcutaneous Dosage for Treatment of GPP When Not Experiencing a Flare The recommended dosage of SPEVIGO for treatment of GPP when not experiencing a flare in adults and pediatric patients 12 years of age and older and weighing at least 40 kg is a loading dose of 600 mg followed by 300 mg administered subcutaneously 4 weeks later and every 4 weeks thereafter. Initiating or Reinitiating Subcutaneous SPEVIGO After Treatment of a GPP Flare with Intravenous SPEVIGO Four weeks after treatment of a GPP flare with intravenous SPEVIGO [see Dosage and Administration (2.4) ] , initiate or reinitiate subcutaneous SPEVIGO for treatment of GPP at a dose of 300 mg administered every 4 weeks. A subcutaneous loading dose is not required following treatment of a GPP flare with intravenous SPEVIGO. 2.4 Recommended Intravenous Dosage for Treatment of GPP Flare The recommended dosage of SPEVIGO for treatment of GPP flare in adults and pediatric patients 12 years of age and older and weighing at least 40 kg is a single 900 mg dose administered by intravenous infusion over 90 minutes. If GPP flare symptoms persist, an additional intravenous 900 mg dose (over 90 minutes) may be administered one week after the initial dose. 2.5 Preparation and Administration Instructions Parenteral drug products should be inspected visually for particulate matter and discoloration, whenever solution and container permits. SPEVIGO is a colorless to slightly brownish-yellow, clear to slightly opalescent solution. Do not use if the solution is cloudy, discolored, or contains large or colored particulates. Prefilled Syringe (Subcutaneous Use for Treatment of GPP When Not Experiencing a Flare) Before subcutaneous injection, remove SPEVIGO prefilled syringes from the refrigerator and allow SPEVIGO to reach room temperature (15 to 30 minutes) without removing the needle cap. Administer SPEVIGO subcutaneously in the upper thighs or abdomen. Do not inject into areas where the skin is tender, bruised, erythematous, indurated, or scarred. If more than one injection is needed to achieve the recommended dose, administer each injection one right after the other. Choose a different injection site for each injection, at least 1 inch away from the other injection sites. Alternate between the upper thigh and abdomen injection sites for each complete dose. If a dose is missed, administer the dose as soon as possible. Thereafter, resume dosing at the regular scheduled time. The SPEVIGO "Instructions for Use" contains more detailed instructions on the preparation and administration of SPEVIGO [see Instructions for Use ] . Vial (Intravenous Use for Treatment of GPP Flare) Preparation SPEVIGO solution for intravenous infusion must be diluted before use. Use aseptic technique to prepare the solution for infusion. Draw and discard 15 mL from a 100 mL container of sterile 0.9% Sodium Chloride Injection. Slowly replace with 15 mL of SPEVIGO (two vials of 450 mg/7.5 mL). Mix gently before use. Use the diluted SPEVIGO solution immediately. If not administered immediately, refrigerate the diluted solution at 2°C to 8°C (36°F to 46°F) for no more than 4 hours. Protect from light. Administration Administer SPEVIGO as a continuous intravenous infusion through an intravenous line containing a sterile, non-pyrogenic, low protein binding in-line filter (pore size of 0.2 micron) over 90 minutes. A pre-existing intravenous line may be used for administration of SPEVIGO. The line must be flushed with sterile 0.9% Sodium Chloride Injection prior to and at the end of infusion. No other infusion should be administered in parallel via the same intravenous access. If the infusion is slowed or temporarily stopped, the total infusion time (including stop time) should not exceed 180 minutes [see Warnings and Precautions (5.3) ] . No incompatibilities have been observed between SPEVIGO and infusion sets composed of polyvinylchloride (PVC), polyethylene (PE), polypropylene (PP), polybutadiene and polyurethane (PUR), and in-line filter membranes composed of polyethersulfone (PES, neutral and positively charged) and positively charged polyamide (PA).

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the labeling: Infections [see Warnings and Precautions (5.1) ] Hypersensitivity and Infusion-Related Reactions [see Warnings and Precautions (5.3) ] Treatment of GPP When Not Experiencing a Flare: SPEVIGO has been associated with an increased incidence (≥9 cases per 100 patient-years) of injection site reaction, urinary tract infection, arthralgia, and pruritus. ( 6.1 ) Treatment of GPP Flare: The most common adverse reactions (≥5%) are asthenia and fatigue, headache, nausea, pruritus and prurigo, infusion site hematoma and bruising, and urinary tract infection. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Boehringer Ingelheim Pharmaceuticals, Inc. at (800) 542-6257 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 clinical practice. Adverse Reactions with Intravenous SPEVIGO for Treatment of GPP Flare (Study Effisayil-1) SPEVIGO was studied in Study Effisayil-1, a randomized, double-blind, placebo-controlled study comparing a single intravenous 900 mg dose of SPEVIGO (n=35) with placebo (n=18) in subjects with generalized pustular psoriasis (GPP) flare. Subjects in either treatment group who continued to experience flare symptoms at Week 1 were eligible to receive a single open-label intravenous dose of 900 mg of SPEVIGO (second dose and first dose for subjects in the SPEVIGO and placebo groups, respectively). At Week 1, 12 (34%) subjects and 15 subjects (83%) in the SPEVIGO and placebo groups, respectively, received open-label SPEVIGO. After Week 1 to Week 12, subjects in either treatment group whose GPP flare reoccurred after achieving a clinical response were eligible to receive a single open-label rescue intravenous dose of 900 mg of SPEVIGO, with a maximum of 3 total doses of SPEVIGO throughout the study. Six subjects received a single open-label rescue dose of SPEVIGO. Thirty-six subjects received 1 dose of SPEVIGO, 13 subjects received 2 doses of SPEVIGO, and 2 subjects received 3 doses of SPEVIGO throughout the study [see Clinical Studies (14) ] . Subjects ranged in age from 21 to 69 years (mean age of 43 years); 45% were White and 55% were Asian; and 68% were female. Table 1 summarizes selected adverse reactions that occurred at a rate of at least 1% and at a higher rate in the intravenous SPEVIGO group than in the placebo group through Week 1. Table 1 Selected Adverse Reactions Occurring in ≥1% of the Intravenous SPEVIGO Group and More Frequently than in the Placebo Group through Week 1 in Subjects with GPP Flare (Study Effisayil-1) Adverse Reaction Intravenous SPEVIGO N = 35 n (%) Placebo N = 18 n (%) Asthenia and Fatigue 3 (9) 1 (6) Headache 3 (9) 1 (6) Nausea 2 (6) 0 Pruritus and prurigo 2 (6) 0 Infusion site hematoma and bruising 2 (6) 0 Urinary tract infection 2 (6) 0 Bacteremia 1 (3) 0 Bacteriuria 1 (3) 0 Cellulitis 1 (3) 0 Herpes dermatitis and oral herpes 1 (3) 0 Upper respiratory tract infection 1 (3) 0 Dyspnea 1 (3) 0 Eye edema 1 (3) 0 Urticaria 1 (3) 0 Specific Adverse Reactions Infections The most frequent adverse reactions that occurred in subjects treated with intravenous SPEVIGO were infections. During the 1-week placebo-controlled period in Study Effisayil-1, infections were reported in 14% of subjects treated with SPEVIGO compared with 6% of subjects treated with placebo. Serious infection (urinary tract infection) was reported in 1 subject (3%) treated with SPEVIGO and no subjects treated with placebo. Infections observed through Week 1 in Study Effisayil-1 in subjects treated with SPEVIGO were mild (29%) to moderate (71%). Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) Two cases of DRESS were reported in Study Effisayil-1 in subjects with GPP who were treated with intravenous SPEVIGO. RegiSCAR DRESS validation scoring (with the following categories: "no", "possible", "probable", or "definite" DRESS) was applied to the reported cases. Reported cases were assessed as "no DRESS" and "possible DRESS". Safety through Week 12 and 17 In Study Effisayil-1, additional adverse reactions that occurred through Week 12 in subjects treated with 1 single intravenous dose of randomized SPEVIGO were mild to moderate infections: device-related infection (3%), subcutaneous abscess (3%), furuncle (3%), and influenza (3%). Additional adverse reactions that occurred through Week 17 in subjects treated with a single intravenous dose of open-label SPEVIGO at Week 1 (second dose and first dose for subjects in the SPEVIGO and placebo groups, respectively) were mild to moderate infections: otitis externa (7%), vulvovaginal candidiasis (4%), vulvovaginal mycotic infection (4%), latent tuberculosis (4%), diarrhea (11%), and gastritis (4%). No new adverse reactions were identified for up to 16 weeks in subjects treated with a single intravenous dose of open-label rescue SPEVIGO from Week 1 to Week 12 (range 1-3 total doses). Adverse Reactions with Subcutaneous SPEVIGO for Treatment of GPP When Not Experiencing a Flare (Study Effisayil-2) Subcutaneous treatment with SPEVIGO was studied in Study Effisayil-2, a randomized, placebo-controlled, double-blind, parallel group study evaluating three dosages of SPEVIGO or placebo in subjects with generalized pustular psoriasis (GPP). Subjects were randomized (1:1:1:1) to receive a 600 mg loading dose (LD) of SPEVIGO followed by 300 mg every 4 weeks (n=30), one of two other dosages of SPEVIGO, or placebo (n=30) for up to 48 weeks [see Clinical Studies (14) ] . Subjects ranged in age from 14 to 75 years (mean age was 40 years); 64% of subjects were Asian and 36% were White; 62% of subjects were female. Regarding the exposure-adjusted incidence rates for subjects on randomized treatment prior to receiving rescue treatment for flare or completing trial without a flare, the rate per 100-patient years for injection site reaction (including erythema, pain, swelling, induration, urticaria, and warmth at the injection site) was 31.6 for the subcutaneous SPEVIGO cohort (600 mg LD followed by 300 mg every 4 weeks) compared to 12.7 for the placebo cohort. Regarding the exposure-adjusted incidence rates for subjects on randomized treatment prior to receiving rescue treatment for flare or completing trial without a flare, the rate per 100-patient years for urinary tract infection was 18 for the subcutaneous SPEVIGO cohort (600 mg LD followed by 300 mg every 4 weeks) compared to 0 for the placebo cohort. Regarding the exposure-adjusted incidence rates for subjects on randomized treatment prior to receiving rescue treatment for flare or completing trial without a flare, the rate per 100-patient years for pruritus was 8.8 for the subcutaneous SPEVIGO cohort (600 mg LD followed by 300 mg every 4 weeks) compared to 0 for the placebo cohort. Regarding the exposure-adjusted incidence rates for subjects on randomized treatment prior to receiving rescue treatment for flare or completing trial without a flare, the rate per 100-patient years for arthralgia was 13.3 for the subcutaneous SPEVIGO cohort (600 mg LD followed by 300 mg every 4 weeks) compared to 6 for the placebo cohort. For subjects on randomized treatment prior to receiving rescue treatment for flare or completing trial without flare, there were 3 subjects who discontinued subcutaneous SPEVIGO in the subcutaneous SPEVIGO cohort (600 mg LD followed by 300 mg every 4 weeks) due to treatment emergent adverse events of psoriasis compared to no subjects in the placebo cohort who discontinued placebo for any treatment emergent adverse event. Safety In Study Effisayil-2 after flare In Effisayil-2, subjects who experienced a GPP flare and received at least one dose of an open-label single intravenous 900 mg dose of SPEVIGO were treated with open-label subcutaneous SPEVIGO 300 mg. These subjects (n=19) received subcutaneous dosing at every 12 weeks which could have been increased to every 4 weeks based on GPPPGA total score or pustulation sub score increased by ≥1 from any previous OL maintenance visit. The reported safety profile of open-label subcutaneous SPEVIGO use after treatment of GPP flare with open-label intravenous SPEVIGO use was consistent with the safety profiles of use of SPEVIGO from Trial Effisayil-1 and randomized controlled data from Trial Effisayil-2. Clinical Development of Spesolimab-sbzo Guillain-Barre syndrome Among approximately 835 subjects exposed to spesolimab-sbzo during clinical development, Guillain-Barre syndrome (GBS) was reported in 3 subjects who received various doses of spesolimab-sbzo via various methods of administration in clinical studies for unapproved indications. 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of SPEVIGO. 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. Immune System Disorders: Immediate systemic hypersensitivity reactions, including anaphylaxis.

12.3 Pharmacokinetics A population pharmacokinetic model was developed based on data collected from healthy subjects, patients with GPP, and patients with other diseases. After a single intravenous dose of 900 mg of SPEVIGO, the population PK model-estimated AUC 0-∞ (95% CI) and C max (95% CI) in a typical anti-drug antibody (ADA)-negative patient with GPP were 4750 (4510, 4970) mcg ∙ day/mL and 238 (218, 256) mcg/mL, respectively. After subcutaneous SPEVIGO 600 mg LD followed by 300 mg every 4 weeks, the mean steady-state trough concentration ranged from 33.4 mcg/mL to 42.3 mcg/mL. When administered intravenously, spesolimab-sbzo AUC increased dose-proportionally from 0.3 to 20 mg/kg, and CL and terminal half-life were independent of dose. Following subcutaneous single dose administration, spesolimab-sbzo exposure increased slightly more than dose-proportionally across the dose range of 150 mg to 600 mg due to increased bioavailability at higher doses. Absorption Following subcutaneous single dose administration of SPEVIGO in healthy volunteers, peak plasma concentrations were achieved between 5.5 to 7 days after dosing. After subcutaneous administration in the abdomen, absolute bioavailability (90% CI) was slightly higher at higher doses with estimated values of 58 (51, 66)%, 65 (60, 69)%, and 72 (65, 79)% at 150 mg, 300 mg, and 600 mg, respectively. Based on limited data, absolute bioavailability (90% CI) in the thigh was approximately 85 (77, 94)% following a subcutaneous dose of 300 mg SPEVIGO. Distribution Based on the population pharmacokinetic analysis, the typical total volume of distribution at steady state was 6.4 L. Elimination Metabolism The metabolic pathway of spesolimab-sbzo has not been characterized. As a humanized IgG1 monoclonal antibody, spesolimab-sbzo is expected to be degraded into small peptides and amino acids via catabolic pathways in a manner similar to endogenous IgG. Excretion In the linear dose range (0.3 to 20 mg/kg), based on the population PK model, spesolimab-sbzo clearance (95% CI) in a typical GPP patient without ADA, weighing 70 kg was 0.184 (0.175, 0.194) L/day. The terminal half-life was 25.5 (24.4, 26.3) days. Specific Populations Age, Gender, and Race Based on population pharmacokinetic analyses, age, gender, and race did not have an effect on the pharmacokinetics of spesolimab-sbzo. Hepatic and Renal Impairment As a monoclonal antibody, spesolimab-sbzo is not expected to undergo hepatic or renal elimination. No formal study of the effect of hepatic or renal impairment on the pharmacokinetics of spesolimab-sbzo was conducted. Body Weight Spesolimab-sbzo concentrations were increased in subjects with lower body weight and decreased in subjects with higher body weight. The clinical impact of body weight on spesolimab-sbzo plasma concentrations is unknown. Pediatric Patients The pharmacokinetics of spesolimab-sbzo have not been studied in pediatric subjects below the age of 12 years. The plasma pharmacokinetics of spesolimab-sbzo observed in pediatric subjects 12 years of age and older and weighing 40 kg or more following subcutaneous administration were consistent with that observed in adults. Drug Interaction Studies No formal drug interactions studies have been conducted with spesolimab-sbzo. In patients with GPP, spesolimab-sbzo is not expected to cause cytokine-mediated CYP interactions as a perpetrator.