How to visualize categorical data with numeric columns
Clearly there's no way to have the names of the drugs.
Assuming the relation between the two columns is important, a scatter plot with units prescribed as X and number of patients as Y might work. You could even add the name of the drug for a few isolated points. Transparency/opacity can be used to show the dense areas.
In case the relation between the columns is not important, you could just plot the two distributions (histograms) with different colours on the same graph.