Compounding is a central activity to the practice of pharmacy. Pharmacists are taught in pharmacy school how to properly compound medications, and many states test pharmacists’ compounding knowledge and skills before issuing them a license.   Pharmacists who practice in the 7,500 pharmacies that specialize in compounding services have generally had advanced training in compounding after they graduated from pharmacy school. No state currently requires a particular type of training, and no nationally recognized specialty exists for pharmaceutical compounding.  Specialized training in pharmacy compounding processes is available through several of the active pharmaceutical ingredient (API) suppliers serving the needs of the compounding pharmacy community.