Methamphetamines and amphetamines are also highly addictive and dangerous stimulants. Commonly referred to as uppers and speed, these drugs are sold in powder, pill, and capsule forms that can be inhaled through the nose, swallowed or injected.

Like cocaine and crack, the physical effects of methamphetamines and amphetamines are increased alertness, euphoria, loss of appetite, dilated pupils, elevated heart rate, increased respiration, and elevated body temperature. Prolonged use of these drugs can cause blurred vision, dizziness, loss of coordination and collapse. An overdose can result in high blood pressure, fever, stroke and heart failure.

The most popular of the two drugs are methamphetamines, commonly called speed, meth, crank, crystal, or crystal meth or in its smokable form, ice, glass or crystal. Methamphetamines are usually found in powder form in colors ranging from white to tan and can be swallowed, inhaled through the nose, or injected. It is sold in small plastic or paper packets/bags.