Mengwei Hu, Ph. D., is currently a Principal Scientist in Discovery Pharmaceutical Sciences at Merck & Co., Inc. Her research interests include physicochemical characterization, physical pharmacy, photoreactivity, toxicology formulation, oral exposure enhancement and controlled release assessment. She has publications and presentations in the QSAR, polymorphism, toxicology formulation development and controlled release assessment. She is also credited with patents for salts, polymorphic forms and pharmaceutical compositions.