If someone took one hit of spice how long would it be in your system?

Spice: Spice or k2 is usually containing synthetic thc. The effects could last 6 to 8 hours depending on the amount or brand and amount. Thc last for days in the urine during drug testing.

Meth, canthinone: Cantinones disappear from your system faster than most amphetamines. Amphetamines can have a half-life (the time it takes for 50% of the drug to be out of your system) of up to 30 hours. That means that there may be small amounts left in your system for several days. Plan on flunking a drug screen for at least a week.

Not Sure: No official studies have been performed. It is thought that it can be detected in your system for up to 72 hours after use.