According to a 2013 forecast from Express Scripts, specialty drugs are projected to increase 67% by the end of 2015, and 3 of the 4 costliest prescription therapy classes will be for specialty conditions.
Although specialty drugs account for a small percentage of total prescription claims volume their costs are rising at an alarming rate and are projected to exceed 50% or more of an employers pharmacy benefits spend in the next few years. The chart on the right indicates the anticipated annual changes in U.S. spending for the highest therapy classes of specialty pharmacy drugs through 2015.