JUSTIN REYNOLDS*, a 22-year-old man, arrives at the medical–surgical unit for a diagnostic workup after reporting abdominal pain, diarrhea, vomiting, and weight loss for 3 days. Justin doesn’t drink alcohol or use tobacco products. He reports a history of Crohn’s disease, for which he receives infusions of infliximab, a biological/immunological medication. During your assessment, Justin reports his abdominal pain as 7/10 despite receiving acetaminophen and corticosteroids to reduce inflammation of the bowel tract.