 Percentage of patients self-medicating before calling the doctor Experimental plan Multicenter, prospective, cluster-randomized, open study, enrolling a cohort of patients who were managed in the emergency department for an acute asthma attack and who have no admission criteria at the end of treatment. Forty-six Emergency Departments will be selected on the national territory, randomized by cluster centers A controlstandard group, centers B treatment group strict formalized protocol and stratified by size number of patients per year and types CHU, CHG, CHR. 