The educational program consist in information about the use of Warfarin and approach the specific topics in Power Point®Slides: Physiology: Definition of oral anticoagulants, mechanisms of action and clinical indication; Medication: Dose, time, storage and duration of therapy; Monitoring: Meaning of International Normalized Ratio (INR) , collection period and doctor's appointments; Other medications: Drug interactions and those considered "natural"; Feeding: Eating foods rich in K vitamin and fats; Alcoholic beverage: Care about alcohol , and if it occurs, does not stop the Oral Anticoagulants; Gestation: Necessity to start IV anticoagulants; Activities: In physical, domestic or work activities to use protective measures; Health treatment: Warn about OA to other professional and take the card of INR values; Travels: On trips take the OA and be programmed to the realization of INR out of their units; Signs /Symptoms: Report underdose (thrombus formation) and overdose (bleeding), seek health care.