Plasma half-life = 12-34 hours. This means that by 12-34 hours, the concentration of meth in your blood will be reduced in half.
Time to leave the body = 2-10 days. Generally, the heavier the user, the longer it will take for meth to leave the body.
Effects of meth use = 8-24 hours.1
Detection in urine tests = up to 72 hours.2