Abstract: A method and a device for giving patients individualized, situation-dependent medication advice are disclosed. Preferably, the invention is implemented in portable computers. The method is founded on knowledge-based computer technology and comprises a reminder function (1), a recording and storage function (2, 3), as well as a function for inductive data analysis (4) and rule generation. When the knowledge-based system (6) finds that a medicine should be taken, the computer emits a signal providing information on the type of medicine and the dose. The patients records the intake of medicine as well as his current state of health. This information is stored in a database together with the point of time. Inductive data analysis is used to spot the relationship between various events and symptoms as well as establish medication rules. These rules are refined upon as new information is recorded in the database, and are automatically adapted to changes in the patient's state of health.