Discontinue use in case of serious hypersensitivity reactions. Avoid psoriatic skin as inj sites. Increased risk of infection. Do not initiate in patients w/ any clinically important active infection until it resolves or is adequately treated. Evaluate for TB 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. W/hold treatment for at least 12 wk after last dose prior to live viral or bacterial vaccination; treatment can be resumed 2 wk after vaccination. Patients w/ renal or hepatic impairment. Women of childbearing potential should use effective methods of contraception during & for at least 12 wk after treatment. Preferable to avoid use during pregnancy. Lactation. Elderly ≥65 yr. Childn & adolescents <18 yr.