Descrição Did you put the lime in the coconut and drink them both down? Essential Group (formerly AmericasDoctor) is helping medical researchers find a more advanced way to cure that bellyache. The company acts as a contract research organization (CRO) to handle everything needed in a clinical drug trial, including study design, patient recruitment, clinical monitoring, and writing up the findings. It conducts Phase I-IV trials in areas such as cardiology, gastroenterology, urology, and women's health through test sites across the US. Essential Group's primary clients are pharmaceutical and biotechnology companies. The company was founded in 1994 and taken private in 2007.