The impact of the bankruptcy of Fengyang Group. According to Baidu health information query, the urine test will turn negative after 5 to 10 days due to metabolic factors in the body. However, please note: the length of metabolism varies with people's metabolic functions. A week as fast as a week may take 15 days for poor health. Available every month. Buprenorphine is an organic compound that is a partial agonist of opioid receptors and is classified as a Class I psychotropic substance.