The DC 37 Health & Security Plan instituted its generic-based prescription drug program two decades ago in response to the skyrocketing costs of prescription drugs.

Today, about 80 percent of the prescriptions covered by the plan are for generics. Over the years, as members have become more comfortable about using generic drugs, the greater usage of generics has helped the plan save millions of dollars.

Still, with 20 percent of the prescriptions covering brand-name drugs, there is room for improvement.