1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.

Discuss in my forum



Updated August 30, 2011

Definition: A drug which elevates mood and alertness while decreasing fatigue; examples include Ritalin (methylphenidate), amphetamine and cocaine.

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.