This project, when finalized, will represent administration of a certain drug under study (theophylline). The main aim of the project is to prove the use of PKNCA package in the pharmacokinetics field. This paper provides a package that explains the following tasks:  Calculates noncompartmental pharmacokinetics parameters (AUC, Tmax, Cmax...); Performs bioequivalence analysis based on FDA and EMEA guidelines ; Reports the results in tables and individual plots.