Subjects

• Drugs -- North America -- History -- 20th century.
• Drugs -- Great Britain -- History -- 20th century.
• Drug utilization -- North America -- History -- 20th century.
• Drug utilization -- Great Britain -- History -- 20th century.
• Pharmaceutical Preparations -- history.
  Medical Subject Heading
• Drug Utilization -- history.
  Medical Subject Heading
• Patient Compliance -- history.
  Medical Subject Heading
• Drug Prescriptions -- history.
  Medical Subject Heading
• Drug Therapy -- history.
  Medical Subject Heading
• Social Change -- history.
  Medical Subject Heading
• History, 20th Century -- Canada.
  Medical Subject Heading
• History, 20th Century -- Great Britain.
  Medical Subject Heading
• History, 20th Century -- United States.
  Medical Subject Heading