- Active PsA that has been inadequately controlled by standard doses of non-steroidal anti-inflammatory drugs (NSAIDs) administered for >/= 4 weeks, or traditional disease-modifying anti-rheumatic drugs (DMARDs) (including sulfasalazine) administered for >/= 3 months, or tumor necrosis factor inhibitor (TNFi) agents, or subjects are intolerant to NSAIDs or DMARDs or TNFi agents, as assessed by the investigator