Methamphetamines are a stimulant, so typically the user will experience a binge and crash pattern. The effects of methamphetamine are typically gone before the drug is actually gone from the person’s body, so the user will try to maintain the high by taking more of the drug. The length of time that meth stays in your system after use depends on the amount of meth used, the person’s metabolism, and the type of test used to detect meth.