Danish researchers, called for long-term safety studies examining adverse reactions to ADHD drugs, in 2011.

In 2011, Danish researchers, after reviewing short-term studies examining adverse reactions to ADHD drugs, also called for long-term safety studies. They pointed out that drug manufacturers funded almost all of the studies, and a majority of the authors received contributions from the pharmaceutical companies producing the medications. “The pharmaceutical company’s job is to sell their product,” Newmark said. “It is very important for us as doctors to base our practice not on what the companies say but on objective evidence,” he said. “It’s easier and cheaper for the pharmaceutical companies to do short-term studies and say, ‘Look, the medicine works.’”