Felton's primary research interests are focused broadly on modified release drug delivery systems and more specifically on polymeric film coating technology. Ongoing studies are investigating the film-tablet interface, novel methodologies to characterize properties of coated solids, and the influence of formulation and processing variables on product performance. Another research area of interest involves formulation development, blinding, and cGMP manufacturing of solid dosage forms for use in clinical trials, through her joint appointment with the Department of Veterans Affairs Cooperative Studies Program.