Although several biological disease-modifying antirheumatic drugs (bDMARDs), including interleukin (IL)-17A inhibitors, are approved for psoriatic arthritis, the treatment of this disease remains suboptimal. Bimekizumab (Bimzelx®), a dual IL-17A and IL-17F inhibitor, is approved in the EU, Great Britain and Japan for the treatment of psoriatic arthritis. In pivotal phase 3 clinical trials in patients who were bDMARD-naïve or previously had an inadequate response or intolerance to tumour necrosis factor (TNF) α inhibitors, bimekizumab improved the signs and symptoms of psoriatic arthritis across a range of joint, skin, radiographic and patient-reported outcomes compared with placebo, including the proportion of patients achieving a ≥ 50% response in the American College of Rheumatology criteria. Phase 2 clinical trial data have shown that responses are maintained up to 3 years. Bimekizumab was generally well tolerated in patients with psoriatic arthritis, with a safety profile consistent with that in other approved indications. The most common adverse events included nasopharyngitis, upper respiratory tract infection, oral candidiasis, headache and diarrhoea. In conclusion, bimekizumab extends the treatment options available to patients with psoriatic arthritis. Plain Language Summary: Psoriatic arthritis is a chronic, painful, inflammatory condition that can involve peripheral and axial joints, skin and nails, and can lead to structural joint damage. Several disease-modifying antirheumatic drugs (DMARDs), including biologicals (bDMARDs) that target various inflammatory cytokines, are approved for psoriatic arthritis. However, many patients do not respond or lose response to these treatments. Bimekizumab (Bimzelx®), an inhibitor of both interleukin (IL)-17A and IL-17F, is approved for the treatment of psoriatic arthritis in the EU, Great Britain and Japan. In clinical trials, bimekizumab improved the signs and symptoms of psoriatic arthritis across key disease domains compared with placebo, including the proportion of patients achieving ≥ 50% response in the American College of Rheumatology criteria. Bimekizumab was efficacious whether patients were naïve to bDMARDs or previously had an inadequate response to or did not tolerate tumour necrosis factor (TNF) α inhibitors. Clinical responses were sustained long-term (up to 3 years). Bimekizumab was generally well tolerated, with the most common adverse events being infections (such as nasopharyngitis, upper respiratory tract infection and oral candidiasis), headache and diarrhoea. In conclusion, bimekizumab extends the treatment options available to patients with psoriatic arthritis. [ABSTRACT FROM AUTHOR]