how long does meth stay in your system?

TLDR: Methamphetamine can be detected in the body for varying lengths of time depending on the type of drug test used, frequency of use, dosage, and individual metabolism. Urine tests typically detect meth for 3 to 7 days, while hair follicle tests can identify it for up to 90 days.

Methamphetamine, a potent stimulant, can remain in the body for different durations based on several factors. Urine tests, the most common method, can detect meth 2 to 5 hours after use, with a detection window of 3 to 7 days. Blood tests can identify meth within 1 to 2 hours and remain effective for 1 to 3 days, while saliva tests can detect it within 30 minutes to an hour for up to 3 days. Hair follicle tests have the longest detection period, identifying meth for up to 90 days.

Detection times are influenced by factors such as frequency of use, dosage, metabolic rate, body mass, and urine pH. Regular users may experience longer detection times due to accumulation, while higher doses can extend the window. Meth has an elimination half-life of approximately 10 to 12 hours, primarily excreted through urine. It's also important to note that certain medications can lead to false positives in urine tests, complicating the detection process. Understanding these variables is crucial for accurate drug testing and addressing methamphetamine use.