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screening, with a stable dose for at least 28 days prior to the first dose;\n  * If using NSAIDs, the dose must have been stable for at least 14 days before the first dose;\n  * If using oral corticosteroids, the dose must have been stable for at least 14 days before the first dose;\n  * Topical treatments for plaque psoriasis must have remained stable for at least 14 days before the first dose;\n* Women of childbearing potential must agree to use effective contraception during the study and for 6 months after the end of the study; men must agree to use effective contraception during the study and for 6 months after the end of the study\n\nExclusion Criteria:\n\n* Presence of conditions other than PsA:\n\n  * Presence of non-plaque psoriasis (i.e., guttate, inverse, pustular, erythrodermic, or drug-induced psoriasis) at screening or first dose;\n  * Presence of any other autoimmune disease, such as rheumatoid arthritis, systemic lupus erythematosus, etc.;\n  * Presence of active (i.e., currently symptomatic) fibromyalgia;\n* Other Medical Conditions and Medical History:\n\n  * Trial participants who are pregnant or breastfeeding;\n  * Evidence of a serious illness\u002Fcondition or unstable clinical condition, or localized active infection\u002Finfectious disease;\n  * Any major surgery performed within 30 days prior to the first dose of study treatment, or any planned surgery during the study;\n  * Cancer or a history of cancer or lymphoproliferative disease within the past 5 years;\n  * New York Heart Association (NYHA) Class III or IV congestive heart failure, or any recent episode of heart failure resulting in NYHA Class III\u002FIV symptoms; or a history of clinically significant ventricular arrhythmia or arrhythmia requiring continuous antiarrhythmic drug therapy;\n  * Uncontrolled hypertension at screening or randomization;\n  * History of thrombotic disease within 24 weeks prior to screening; viii. History of acute coronary syndrome and\u002For any major cerebrovascular disease within 24 weeks prior to screening;\n  * Current or recent (within 3 months prior to randomization) gastrointestinal disease that may affect absorption of study treatment, including gastrointestinal surgery;\n  * Severe blood loss (\\> 500 mL) or blood transfusion within 4 weeks prior to randomization;\n  * Inability to take oral medication;\n  * Inability to undergo venipuncture and\u002For tolerate venous access;\n  * History of substance abuse with inability to abstain or presence of a psychiatric disorder;\n  * Any other medical, psychiatric, and\u002For social reason as determined by medical judgment;\n* Prior and concomitant medications: If the trial participant has a history of biologic use, the exclusion criteria specified in the protocol will apply;\n* Infection-related:\n\n  * Active tuberculosis identified by chest radiography within 6 months prior to screening; trial participants with a negative chest radiography within 3 months prior to screening are eligible if they meet the protocol requirements;\n  * Hepatitis C, hepatitis B, or human immunodeficiency virus (HIV) infection; or syphilis infection requiring treatment;\n* Abnormal physical examination or laboratory findings;\n* Other:\n\n  * History of any major drug allergy; known allergy to any excipient of the investigational product;\n  * Inability to comply with the trial protocol;\n  * History of substance abuse with inability to abstain or presence of a psychiatric disorder;\n  * Participation in another clinical trial and use of another investigational drug (other than for psoriatic arthritis) within 4 weeks prior to the first dose, based on the date of discontinuation from the previous trial;\n  * Planned or previous allogeneic bone marrow transplantation or solid organ transplantation;\n  * Any condition that, in the investigator's judgment, poses a serious risk to the safety of the trial participant or affects the participant's ability to complete the study.","ALL","18 Years","70 Years",{"count":640,"type":641},156,"ESTIMATED","INTERVENTIONAL",[644],"PHASE2","This study is a marketing-oriented clinical trial of TQH3906 Capsules. A total of 156 participants are planned to be enrolled, aiming to evaluate the dose-effect relationship of TQH3906 versus placebo in the treatment of active Psoriatic Arthritis (PsA) at Week 12, with the proportion of participants achieving an American College of Rheumatology 20% (ACR20) Improvement Criteria (ACR20) response at Week 12 as the primary endpoint.",[647],"Psoriatic Arthritis","NOT_YET_RECRUITING","2026-02-05",{"date":651,"type":652},"2026-02-12","ACTUAL",{"date":654,"type":641},"2026-04",{"date":656,"type":641},"2027-11",{"name":658,"class":6},"Chia Tai Tianqing Pharmaceutical Group Nanjing Shunxin Pharmaceutical Co., Ltd.",43]