Combination therapy has proven to be an effective strategy for treating many of the worlds most intractable diseases. A growing number of investigators in academia, industry, regulatory agencies, foundations and advocacy organizations are interested in pursuing a combination approach to treating Alzheimers disease. A meeting co-hosted by the Accelerate Cure/Treatments for Alzheimers Disease Coalition, the Critical Path Institute and the Alzheimers Association addressed challenges in designing clinical trials to test multiple treatments in combination and outlined a roadmap for making such trials a reality.