A federal agency review of prescription drug monitoring programs finds that Massachusetts has the highest rate of prescriptions for stimulants among 26 representative states, including medications to treat ADHD such as Adderall, Ritalin and Concerta. John Eadie, who tracks drug prescriptions as part of the national High Intensity Drug Trafficking Area (HIDTA) program, presented the data during a state legislative hearing Tuesday to address concerns about the rising use of illegal stimulants such as cocaine and methamphetamines.