1.1 Apremilast alone or in combination with disease‑modifying antirheumatic drug (DMARD) therapy is not recommended within its marketing authorisation for treating adults with active psoriatic arthritis that has not responded to prior DMARD therapy, or such therapy is not tolerated.
1.2 People whose treatment with apremilast was started within the NHS before this guidance was published should be able to continue treatment until they and their NHS clinician consider it appropriate to stop.
https://www.nice.org.uk/guidance/ta372