Apremilast is primarily used in the treatment of certain inflammatory conditions. It is commonly prescribed for managing moderate to severe plaque psoriasis in adults who are candidates for phototherapy or systemic therapy. Additionally, it is effective in treating active psoriatic arthritis, helping to reduce symptoms such as joint pain, swelling, and stiffness. Apremilast is also utilized for oral ulcers associated with Behçet’s disease, providing relief from painful mouth sores. Its mechanism involves targeting specific enzymes to regulate inflammation, making it a valuable option for patients with these chronic conditions.