Native American History. Native American cultures in the United States include a wide array of socially and geographically diverse groups, whose nomadic ancestors are believed to have traveled via a long-gone land bridge across the Bering Strait at least 13,000 years ago.
182. Valium can stay in your system and be detected in urine for up to 5-7 days after therapeutic use. Chronic use (over one year) of Valium, however, can be detected much longer. The detection window for Valium in urine screens is up to 4-6 weeks. More here on the detection window and drug testing for Valium.
How Long Does Valium Stay In Your System After Treatment? Diazepam is well absorbed after oral administration. Peak plasma concentration is reached in 1 to 2 hours. It gets metabolized in the liver by a process called microsomal oxidation in a larger number of active metabolites. For multiple doses, there is a significant accumulation of active metabolites and diazepam.