Used topical steroids, topical tar preparations, or other anti‐psoriatic preparations within the 2 weeks prior to day 0 or during the study period
Presence of erythrodermic, pustular or guttate psoriasis
Significant infections within the 30 days prior to day 0
Received investigational drugs within the 4 weeks prior to screening or during the study period
Treated with systemic anti‐psoriatic drugs such as steroids, retinoids, ciclosporin, PUVA therapy or methotrexate within the 4 weeks prior to day 0 or during the study period
Received systemic antibiotics within the 4 weeks prior to day 0
Treated with UV light therapy (UVB, nbUVB) within the 2 weeks prior to day 0 or during the study period
Used infliximab within 14 days of day 0 or during the study period
Used other biologic agents for the treatment of psoriasis besides etanercept 8 weeks prior to day 0 or during the study period
Had an allergic reaction to infliximab
Unstable or serious medical condition as defined by the investigator or presence of any significant medical condition that might cause this study to be detrimental to the participant
Uncontrolled or severe comorbidities such as poorly‐controlled diabetes mellitus, NYHA (New York Heart Association) class III or IV heart failure, history of myocardial infarction or cerebrovascular accident or transient ischaemic attack within 3 months of screening visit; unstable angina pectoris
Uncontrolled hypertension, oxygen‐dependent severe pulmonary disease
Known sero‐positivity for HIV virus or history of any other immunosuppressive disease
Active or chronic Hepatitis B or C
Any mycobacterial disease, patient with a chest X‐ray suggestive of TB or taking anti‐TB medication
Known hypersensitivity to etanercept or one of its components
Received a live attenuated vaccine within the 12 weeks prior to day 0 or plans to receive 1 during the study
Current pregnancy or lactation