Shake well

I try to type up labels exactly the way the doctor wants the Rx labeled...

A few weeks ago a lady brings in a new script for her ear.  I type it up just as it was written:  "Instill 2 drops to affected ear three times daily.  Shake well."

Yep, you guessed it.  I get a phone call later in the day.  The lady complains, "It hurts when I shake my head."