Two such Methamphetamines are crank and ice. Crank refers to any form of methamphetamine. Ice is a crystallized smokeable chunk form of methamphetarnine that produces a more intense reaction than cocaine or speed.
Ice has an appearance that is clear and crystal-like, and resembles frozen ice water.
Methamphetamines stimulate the central nervous system, and the effects may last anywhere from 8 to 24 hours. Crank and ice are extremely addictive and produce a severe craving for the drug. Methamphetamines cause a severe crash after the effects wear off. The crash, or low feeling is more intense and longer lasting than both speed and cocaine. The effects are not only long lasting, but continue to cause damage to the user long after use has stopped.