Plaque psoriasis Sotyktu is indicated for the treatment of moderate to severe plaque psoriasis in adults who are candidates for systemic therapy. Psoriatic arthritis Sotyktu, alone or in combination with methotrexate (MTX), is indicated for the treatment of active psoriatic arthritis (PsA) in adults who have had an inadequate response or who have been intolerant to a prior disease-modifying antirheumatic (DMARD) therapy.