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adverse reactions
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 LEO Pharma, Inc. at 1-877-494-4536 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.