Is the WHO analgesic ladder still valid? Twenty-four years of experience

MeSH terms

• Administration, Oral
• Analgesia, Patient-Controlled
• Analgesics / administration & dosage
• Analgesics / therapeutic use*
• Analgesics, Opioid / administration & dosage
• Analgesics, Opioid / therapeutic use
• Anti-Inflammatory Agents, Non-Steroidal / therapeutic use
• Chemotherapy, Adjuvant
• Drug Administration Schedule
• Humans
• Neoplasms / physiopathology*
• Neoplasms / psychology
• Neuralgia / drug therapy
• Pain / classification
• Pain / drug therapy*
• Practice Guidelines as Topic / standards*
• World Health Organization