.Crystal meth is a powerful stimulant drug that can cause Trusted Source feelings of euphoria and high energy. People may choose meth because of these euphoric effects

Meth can also cause rapid weight loss, a higher libido, and intense feelings of alertness and concentration.

Some people self-medicate for these effects, hoping to lose weight, improve their sexual performance, reduce depression, or concentrate more at work or school.

For most people, the effects of crystal meth last for 6 to 12 hours, making the “high” much longer than that of other stimulants, such as cocaine. Some people choose meth because of its longer-lasting effects.