A highly addictive synthetic stimulant that gives a temporary sense of heightened euphoria, alertness, and energy; aka crank, speed, crystal meth (the rock form), glass, ice, Tina, and yaba. It is often used for chemsex. While users find it can initially increase their sexual drive and sensations, with prolonged use, methamphetamine becomes the cause of crystal dick, which is meth-related erectile dysfunction. Meth is the child of its parent drug, amphetamine, which was used in nasal decongestants and bronchial inhalers. However, meth is a much more powerful stimulant than amphetamine, because it is more effective at getting to the brain. It is also different from cocaine. Nerve cells respond differently to meth than cocaine. While 50% of cocaine is removed from the body in one hour, it takes twelve hours for 50% of methamphetamine to be removed from the body. In addition to causing crystal dick, chronic meth use can result in permanent damage to the heart, brain, liver, kidney, lungs, bones and teeth. It can also cause paranoia, hallucinations, psychotic symptoms, mood disturbances, delusions, and violent behavior.