As a drug decision support system, Vademecum provides dozens of information to healthcare professionals such as posology, indication, contraindication, pregnancy, lactation, overdose and treatment, daily or cumulative maximum dose, interaction, incompatibility, side effect, storage condition. In addition, all this information can be integrated into the software of the institutions with Vademecum API and extra control mechanisms can be developed. Thanks to these situations, treatment effectiveness and safety are increased by using Vademecum solutions.