Methamphetamine Methamphetamine Methamphetamine was first formulated in 1919. It is also known as speed, crank, meth, crystal or crystal-meth. It sometimes appears in large rock-like chunks, and is usually white or slightly yellow, depending on purity levels.
Ice is colorless and odorless, resembling rock candy.
But unlike crack, whose high lasts approximately 20 minutes, the effects of ice may last 8 to 12 hours. When list in a glass pipe, the crystals turn to liquid and produce a strong vapor. This vapor enters the blood stream directly through the lungs and is rapidly carried to the brain. Ice reverts to its solid state when cool, thus becoming reusable and transportable. The use of ice results in the same type of major problems caused by amphetamine use.