Customizing an "other" option in a drop-down menu

Here's a snippet that allows you to use a customizable "other" option in a drop-down menu.

{note}{formtext: name=other} << here you can specify what the "other" option will be, in case none of the standard options apply.

{endnote: trim=right}
Patient displaying symptoms of {formmenu: default=flu; dizziness; gastritis; {=other}}