Medication Reminder (again)

Making a dropdown list is fairly straightforward, but your above statement does not make it clear as to what you want to do?

The simplest approach is to use a spinner:

There are extensions available that provide "popup" menus, but i would stick to the basics for now...

If your dropdown list contains for example: daily,twice a day, weekly, monthly, what more do you need to do after an item has been selected?