TDDA is an established leader in clinical research,  working with the industry and healthcare community to advance therapeutic treatment options. Since its inception in 1999, TDDA has completed over 200 Phase II, III and IV research projects sponsored by the pharmaceutical industry. Our combined referral base spans over 700 physicians serving approximately 3 million people. Over the years, TDDA has successfully managed, executed, and delivered clinical trials, and is widely recognized as an essential industry partner in conducting clinical trials. As we continue to expand our therapeutic excellence, our goal is to be at the forefront of advanced clinical therapy, and strive to offer our physicians and patients access to leading treatment options. To learn more about our areas of expertise, please visit: