“…Cocaine users usually experience dramatic withdrawal symptoms ("crash") within 30 minutes after a single ingestion, given cocaine's rapid clearance from the brain (Volkow et al, 1995). In contrast, regular BZD users who ingest a single dose per day might never experience typical BZD withdrawal symptoms such as increased anxiety, insomnia, and autonomic instability (Graves et al, 1997;Habraken et al, 1997;Murphy & Tyrer, 1991). Moreover, many BZD users who withdraw experience only mild or no transient symptoms (Voyer, Richard, & Dupont, 2001).…”