How Long does Meth Stay in Your System?

The short answer to how long does meth stay in your system is 1 to 4 days. But it helps to know that methamphetamines' half life is about 10.1 hours, meaning it takes about 10 or so hours for half of the drug to leave your body. It also depends on how the drug entered the body (it takes longer to leave if it was injected). If a person has used this illegal drug for longer periods of time, it .
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