Yes. In a table (tblVisitReasons) put two fields:
ReasonsForVisit and Visit. You can make them both character.
Make the source the first dropdown a distinct query on that table.
Select Disticnt ReasonsForVisit from tblVisitReasons.
Make the source of the second dropdown as follows:
Select Visit from tblVisitReasons Where ReasonsForVisit = Forms!frmMyForm!ReasonForVisitComboBox
In the AfterUpdate event of the first combo box issue a requery on the second combo box.
Sub ReasonsForVisit_AfterEvent()
empVisit.Requery
End Sub
Try that.
E