The purpose of the research.1. to study the prevalence of patients who take the drug from the travel category at onphit airs accident and emergency hospital phumiplodunyadet.2. to study the factors associated with the symptoms of drug use and happy travel airs onphit.How to do research: is divided into two parts: part a program description, to study the prevalence of drug use should come from other onphit. Another part is cutting across all sectors of education. Collect information about patients who have symptoms should use the drug tramadol (case group) and matched to patients who have symptoms, they were without a prescription tramadol (control group) who were treated at accident and emergency. Balancing nutrient chart hospital Det between January 1, 2012 – September 30, 2014 in the ratio 1: 1.
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