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how long does diazepam stay in your system

Valium half life: How long does Valium stay in your system. 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