Problem: A patient who has type 2 diabetes mellitus takes metformin (Glucophage). The patient tells the primary care NP that he will have surgery in a few weeks. The NP should recommend: O taking the metformin dose as usual the morning of surgery. Need Assignment Help? O adding a sulfonylurea medication until recovery from surgery is complete. that the patient stop taking metformin several days before surgery. O using insulin during the perioperative and postoperative periods.