how long does valium stay in your body for a blood test?
Blood Test. You may go for a blood test one to two and a half hours after taking a Valium tablet. If you use an injection, you can immediately detect it in your blood. In both cases, Valium can stay in the blood for more than a week. Meaning, you may test positive even weeks after discontinuing the use. Remember that a possible positive or negative test result also depends on the sensitivity of the testing method.