Immediately discontinue administration in case of serious hypersensitivity reactions. Avoid psoriatic skin as inj sites. Increased risk of infection. Do not initiate treatment in patients w/ any clinically important active infection until it resolves or is adequately treated. Evaluate for TB infection prior to treatment initiation. Monitor for signs & symptoms of active TB during & after treatment. Evaluate liver enzymes at baseline & thereafter when prescribing Tremfya every 4 wk in psoriatic arthritis. Temporarily interrupt treatment if increases in ALT or AST are observed & drug-induced liver injury is suspected. Live vaccines should not be used concurrently. Before live viral or bacterial vaccination, treatment should be w/held for at least 12 wk after the last dose & can be resumed at least 2 wk after vaccination. Has not been studied in patients w/ renal or hepatic impairment. Women of childbearing potential should use effective methods of contraception during treatment & for at least 12 wk after treatment. Preferable to avoid use during pregnancy. Discontinue breast-feeding, or abstain from Tremfya therapy during lactation. Safety & efficacy in childn & adolescents <18 yr have not been established. Limited information in elderly ≥65 yr & very limited information in elderly ≥75 yr.