Pharmacists are trained professionals. Yet, pharmacy errors occur with frightening regularity. According to a recent industry news report, there are at least 1.5 million preventable pharmacy errors each year in the United States. While many Maryland pharmacy errors are the result of a pharmacist mixing up the names of similar-sounding drugs, the dosing errors are also very common.
Math is a very important part of a pharmacist’s job. In fact, a life changing pharmacy error can be caused by a very simple mistake involving simple arithmetic. The aforementioned article explains several pharmacy errors and how easy they can happen. For example, one pharmacy received a prescription for a baby weighing 13 pounds, 5 ounces. The prescription called for 333 milligrams Amoxicillin suspension every 12 hours for 7 days. Thus, according to the prescription, the child would receive 666 milligrams of the medication per day. The general medication guidelines for Amoxicillin provide for up to 25 milligrams of medication per kilogram, given in evenly-divided doses ever 12 hours.
The proper way to fill the prescription is as follows: The child weighs 13 pounds, 5 ounces, or approximately 6.05 kilograms. By multiplying this number by 25, the daily dose for the child should be about 151 milligrams. Because the medication should be dosed twice per day, 12 hours apart, each dose should be about 76 milligrams.