Solids with crystals as their basic units are called true solids. Ice methamphetamine is found in several forms. It may be transparent crystal or my be brown or white powder. It affects central nervous system mainly dopamine. It can be injected or smoked. It affects the body within five seconds. People usually feels happy, powerful and energetic. It is a harmful drug. It increases blood pressure and heart rate. People who uses this drug shows loss of interest in sleeping, sex and eating. Mental confusion and rapid speech are some common behaviour.