Metoprolol tablets are used by people with hypertension. People sometimes cut tablets in half, for cost savings or just to get the right dosage, as in this example.
The main journal description. The description field reminds this user that he is taking half a tablet. There is one attribute for “Dose”:
The “Dose” attribute is described as an Amount, with a unit of “tablet (50 mg)” and default amount “0.5″ (again reminding the user to take only half of a 50 mg tablet):
The resulting Event Entry screen: