how long does speed stay in your system
Speed or amphetamines usually stay in your system for about 2 to 5 days. It shows in your urine up to 6 days. While it could be found in your hair molecules for 9 days. Here is a link. - http://www.ohsinc.com/how_long_do_drugs_stay_in_your_system.htm
Speed will usually stay in your system for about 4 days but this depends on the individual person. For more information on drugs in the human body, please visit http://www.ohsinc.com/how_long_do_drugs_stay_in_your_system.htm.
Methamphetamines such as speed can stay in the body for 2-4 days. The difference in length of time depends on the dosage taken, as well as how often a person uses it.
The length of time the drug speed stays in your system depends on how long one has been taking it. For a first time use, speed should leave the system in 1-2 days.