What is it?

"Ice" is a slang term for a very pure, smokeable form of methamphetamine. It is an extremely addictive stimulant.

What does it look like?

Clear crystal chunks, like ice.

How is it used?

Usually smoked, sometimes snorted or injected.

What are its short-term effects?

Its effects are similar to those of cocaine but longer lasting. "Ice" can cause erratic, violent behavior among its users. Effects include suppressed appetite, interference with sleeping behavior, mood swings and unpredictability, tremors and convulsions, increased blood pressure, irregular heart rate.

What are its long-term effects?

Long-term effects can include coma, stroke or death.

Source: NIDA