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Generalized pustular psoriasis (GPP) is a rare, immune-mediated inflammatory disease with characteristic cutaneous and systemic manifestations. Mutations in the interleukin-36 receptor antagonist (IL36RN) gene have been implicated in its pathogenesis. Spesolimab is a novel systemic biologic therapy that selectively inhibits interleukin-36. It was recently approved by Health Canada and the US FDA for the treatment of GPP flares in adults. Results from phase 1 and 2 studies have been promising. Herein, we review the efficacy and safety of spesolimab for the treatment of GPP flares, as demonstrated in clinical trials., Competing Interests: Ronald Vender has been an advisor, consultant, speaker, and/or investigator for AbbVie, Actelion, Amgen, Aralez, Arcutis, Astellas, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Cipher, Centocor, Dermira, Dermavant, Eli Lilly, Galderma, GSK, Innovaderm, Janssen, Kabi-Care, LEO Pharma, Merck, Novartis, Palladin, Pfizer, Regeneron, Sandoz, Sun Pharma, Takeda, UCB, and Viatris-Mylan. Jensen Yeung has been an advisor, consultant, speaker, and/or investigator for AbbVie, Allergan, Amgen, Astellas, Boehringer Ingelheim, Celgene, Centocor, Coherus, Dermira, Eli Lilly, Forward, Galderma, GSK, Janssen, LEO Pharma, Medimmune, Merck, Novartis, Pfizer, Regeneron, Roche, Sanofi Genzyme, Sun Pharma, Takeda, UCB, Valeant, and Xenon. Alim R. Devani has been an advisor, consultant, speaker, and/or investigator for AbbVie, Amgen, AnaptysBio, Arcutis, Arena, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Concert, Dermavant, Dermira, Eli Lilly, Galderma, GSK, Incyte, Janssen, LEO Pharma, Medexus, Nimbus Lakshmi, Novartis, Pediapharm, Pfizer, Regeneron, Reistone, Sanofi Genzyme, Sun Pharma, Takeda, Tribute, UCB, and Valeant. Vimal H. Prajapati has been an advisor, consultant, speaker, and/or investigator for AbbVie, Actelion, Amgen, AnaptysBio, Apogee Therapeutics, Aralez, Arcutis, Arena, Asana, Aspen, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Cipher, Concert, CorEvitas, Dermavant, Dermira, Eli Lilly, Galderma, GSK, Homeocan, Incyte, Janssen, LEO Pharma, Medexus, Nimbus Lakshmi, Novartis, Pediapharm, Pfizer, RAPT Therapeutics, Regeneron, Reistone, Sanofi Genzyme, Sun Pharma, Takeda, Tribute, UCB, and Valeant. Tuba Bukhari, Mariya Markovina, Abrahim Abduelmula, and Brian D. Rankin have no relevant disclosures. Funding sources: None.

A novel topical corticosteroid, halobetasol propionate (HP) 0.01% lotion (Bryhali™), has recently been introduced for the treatment of plaque psoriasis and corticosteroid-responsive dermatoses in adults. Once daily application of HP 0.01% lotion is indicated for use up to 8 weeks. Treatment success for plaque psoriasis in the pivotal phase 3 clinical trials (defined as an Investigator Global Assessment [IGA] of clear/almost clear [IGA 0/1] with ≥2-grade improvement from baseline) occurred in over one-third of patients by week 8. Treatment-emergent adverse events were typically mild-to-moderate in intensity and usually limited to the application site(s). No treatment-related cases of skin atrophy have been reported from the studies. Counselling should be considered to optimize treatment outcomes., Competing Interests: Abrahim Abduelmula and Brian D. Rankin have no relevant disclosures. Ronald Vender has been an advisor, consultant, speaker, and/or investigator for AbbVie, Actelion, Amgen, Astellas, Celgene, Dermira, Eli Lilly, Galderma, Janssen, LEO Pharma, Merck, Novartis, Pfizer, Regeneron, and Takeda. Jensen Yeung has been an advisor, consultant, speaker, and/or investigator for AbbVie, Allergan, Amgen, Astellas, Boehringer Ingelheim, Celgene, Centocor, Coherus, Dermira, Eli Lilly, Forward, Galderma, GSK, Janssen, LEO Pharma, Medimmune, Merck, Novartis, Pfizer, Regeneron, Roche, Sanofi Genzyme, Sun Pharma, Takeda, UCB, Valeant, and Xenon. Alim R. Devani has been an advisor, consultant, speaker, and/or investigator for AbbVie, Amgen, AnaptysBio, Arcutis, Arena, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Concert, Dermavant, Dermira, Eli Lilly, Galderma, GSK, Incyte, Janssen, LEO Pharma, Medexus, Nimbus Lakshmi, Novartis, Pediapharm, Pfizer, Regeneron, Reistone, Sanofi Genzyme, Sun Pharma, Tribute, UCB, and Valeant. Vimal H. Prajapati has been an advisor, consultant, speaker, and/or investigator for AbbVie, Actelion, Amgen, AnaptysBio, Aralez, Arcutis, Arena, Aspen, Bausch Health, Boehringer Ingelheim, Bristol Myers Squibb, Celgene, Cipher, Concert, Dermavant, Dermira, Eli Lilly, Galderma, GSK, Homeocan, Incyte, Janssen, LEO Pharma, Medexus, Nimbus Lakshmi, Novartis, Pediapharm, Pfizer, Regeneron, Reistone, Sanofi Genzyme, Sun Pharma, Tribute, UCB, and Valeant. Funding sources: None.