Methamphetamine

In my opinion, the number one drug that poses the greatest threat to our society is methamphetamine, also known as meth or crystal meth. Meth is a highly addictive and powerful stimulant that affects the central nervous system. It causes mood swings, anxiety, euphoria, depression, delusional thinking, paranoia, and even permanent psychological damage. Prolonged use of meth can cause damage to the heart, liver, kidneys, and lungs, which can ultimately lead to death.

Phil Chalmers, Inside the Mind of a Teen Killer, 2009