The Pan Mersey Area Prescribing Committee recommends the sequential use of high cost agents, adalimumab, apremilast▼, certolizumab, etanercept, golimumab, infliximab, ixekizumab▼, secukinumab▼, tofacitinib▼ and ustekinumab in the management of psoriatic arthritis (PsA) in accordance with the recommendations below, and the accompanying Cheshire and Merseyside harmonised high cost drugs pathway.