There are times when a provider wants a patient to stop taking a current medication, either one they prescribed previously or one prescribed by an outside provider. Since the patient is currently taking it at the time of the appointment the med should still be listed in the Current Med field on a note. 

The Stop Med button is available in the Current Meds, Prescription Writer and Quick Med screens. Clicking Stop Med will mark the medication as not current and put the next day as the 'end date' for the prescription.