Speed Withdrawal: Signs, Symptoms, Treatment & Recovery

Speed is a street name for an amphetamine but is also sometimes used to describe methamphetamine, stimulant drugs that affect your central nervous system. Speed generally comes as a white, bitter powder or a pill. Crystal meth is an illegal form of methamphetamine that often resembles chunks of glass or bluish-white rocks. When taken legally under a doctor’s instructions, amphetamine and methamp.