title: I'm about to have elective surgery. My doctor recommended that I start taking a drug called metoprolol a few days before surgery to protect my heart. How does this work?
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage*; D017558:Elective Surgical Procedures; D008790:Metoprolol / Q000008:administration & dosage*; D011183:Postoperative Complications / Q000517:prevention & control
chemical_list: D000319:Adrenergic beta-Antagonists; D008790:Metoprolol