The thesis describes the solution of calculating the applied medication ingredients in the electronic prescribing applications. It presents the common problems of such applications and their solutions. The key areas for the success are a properly structured, multi-level drug dictionary, unit dictionary with mutual conversion option and a system for creating and administering medications. Electronic prescribing systems coincide very well with the use of an openEHR standard, which represents a standardized structure for storing clinical data at the international level. The thesis presents the applicability of such a system as a solution for computing an overdose of an applied medication ingredient in applications for electronic prescribing. Solution is presented as used in the Think!Meds product. A statistical analysis of such a system was also performed on the real data of the hospital. System is implemented as clinical decision support for warnings about possible overdose of paracetamol.
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