Hospital pharmacies, as opposed to retail pharmacies, present unique challenges that can lead to mistakes being made. Those include a much larger amount of patients being served at any given time, more complicated health issues or treatments, different doctors providing coordinated care, and the different medical professionals’ habits in writing prescriptions and delegating tasks to others.
In one case (login required), which eventually prompted a malpractice lawsuit, there was some confusion when a doctor initially wrote a prescription for 10 units, and after deciding to increase the dosage, rather than writing a fresh prescription, he wrote a 2 over the 1, in an attempt to indicate 20.
What happened next, however, demonstrates what can, and does, happen in practice. The nurse practitioner who had walked in as the doctor was writing the prescription, did not know what dosage the doctor had intended, and when she found it in the patient’s file, had difficulty discerning what the doctor had intended. After conferring with the pharmacist for several minutes, and stating that they both saw a 1 and a 2, they concluded that the prescription must have been for 120 units. The prescription for 120 millimoles was filled for the patient, and the prescription was filled and administered to the patient. The nurse practitioner left, since her shift had ended, and when she returned the next day, the patient had died.