What term is used for a prescription that is written for a patient with a diagnosis of a chronic illness?

The term used for a prescription written for a patient with a diagnosis of a chronic illness is "maintenance medication." Maintenance medications are prescribed to manage chronic conditions over an extended period. These medications help stabilize or control symptoms and prevent disease progression, allowing patients to maintain their quality of life.

In contrast, short-term medications are typically used for temporary conditions or to provide immediate relief of symptoms. Acute medications address sudden or severe conditions, while experimental medications refer to drugs that are still in clinical trials and have not yet been approved for general use. Therefore, maintenance medication is specifically designed for ongoing treatment of chronic illnesses, making it the correct choice in this context.