[Prevention of avoidable iatrogenic disease: when patient safety joins with health care economics].

The prevention of preventable adverse therapeutic events (iatrogenic), especially drug related, is a major medical goal for patients, economics and the community. Its incidence is 5 to 15 per cent of hospitalization days. Preventable iatrogenic is a main problem in terms of public health owing to its human and economic consequences. Prevention of iatrogenic is based on better knowledge of its reality, on well-adapted initial and long-term intensive training of physicians, other healthcare workers and also patients and citizens. A better healthcare system is also needed.