In April of 2004, the Joint Commission on Accreditation of Healthcare Organization banned nine specific abbreviations from being used in health care facilities. These abbreviations were banned because of potential miscommunication between prescribing physicians and pharmacists.
"Unit" cannot be abbreviated as "U" or "u," and "IU" cannot be used for "International Unit," according to JCAHO's rules. "Q.D." and "Q.O.D." are also not allowed to be used to indicate "once daily" or "once every other day." Morphine sulfate and magnesium sulfate must also be written out without using their common abbreviations. Zeros are banned from being used to trail an ordinal number and must be present in front of a decimal point.