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It depends on what you mean by "stay in your system." The time during which a test can detect it in your system depends on the test. For a urine test, it's around 6 hours. For a blood test, it's a few days. For a hair test, it's how long your hair takes to grow out. Each of those tests gets more expensive as you progress in detection times.

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∙ 14y ago

What else can I help you with?