- Vitamins
- Vulnerability as Cause of Substance Abuse
- Welfare Policy and Substance Abuse in The United States
- Wikler's Pharmacologic Theory of Drug Addiction
- Withdrawal
- Women and Substance Abuse
- Women's Christian Temperance Union
- Wood Alcohol (Methanol)
- World Health Organization Expert Committee on Drug Dependence
- Yippies
- Zero Tolerance
