Actually.. a "Z-bar" is a term used for a 2mg bar of alprazolam (commonly produced by Upjohn Pharmaceuticals under the trade name "xanax") It is called a "Z-Bar" because Xanax is pronounced with the first syllable sounding like that of a z

Organic Clif Bar for active kids. Best Flavor is Peanut Butter.

Z-bars are the street name for XANAX tablets.