How long does it stay in your system methamphetamine?

Stimulants stay in the blood for up to a week. They stay in your hair for as long as the hair is on your head. The best way to avoid failing a drug test is to quit using illegal drugs. There are lots of good places that will help you get off the drugs and get back into a healthy lifestyle. Methamphetamine have a half-life of 9-15 hours. May take around 2-3 days or longer. It depends on body condition. At the bottom line, Don't do drugs. If it shows up positive on employment screening test, it will mess up your life.