AU stands for Both Ears (auris uterque).
What does AU mean?
both ears
AU stands for both ears, from the Latin auris uterque. It appears on prescriptions and notes to show that a treatment, such as ear drops, applies to both ears. It sits alongside AD (right ear) and AS (left ear). Note that AU is on several do not use lists because it can be confused with similar abbreviations, and many organizations now recommend writing both ears in full.
When is AU used?
AU appears in ear, nose, and throat notes and on prescriptions for ear medication, alongside AD and AS.
Frequently asked questions
What does AU stand for?
AU stands for both ears, from the Latin auris uterque.
How does AU relate to AD and AS?
AD means right ear and AS means left ear, while AU means both ears.
Is AU safe to use?
AU is on several do not use lists because it can be confused with similar abbreviations. Writing both ears in full is safer.
Where is AU used?
It appears on prescriptions and notes for ear treatments meant for both ears.