COUNTS.xlsx

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In Excel 2010, &nbsp;how do I count unique records based on two columns?<br />
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For example, I may have a patient that has the following three presecriptions:<br />
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Name &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Drug &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Dosage<br />
Smith &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Simvastatin &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 40mg<br />
Smith &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Simvastatin &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 20mg<br />
Smith &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Omeproezal &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;20mg<br />
Jones &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Cyclobanzaprine &nbsp;10mg<br />
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This should have a count of three (3)<br />
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Secondarily, how could I count all unique Name, Drug, Dosage combinations, which in this example would be four (4).<br />
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Lastly, how could I count the number of patients with multiple unique prescriptions, which in this example would be two (2).
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In Excel 2010,  how do I count unique records based on two columns?

For example, I may have a patient that has the following three presecriptions:

Name          Drug                       Dosage
Smith          Simvastatin           40mg
Smith          Simvastatin           20mg
Smith          Omeproezal          20mg
Jones           Cyclobanzaprine  10mg

This should have a count of three (3)

Secondarily, how could I count all unique Name, Drug, Dosage combinations, which in this example would be four (4).

Lastly, how could I count the number of patients with multiple unique prescriptions, which in this example would be two (2).

How do I count unique records based on two columns in Excel?

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