Step-Ladder Analgesic Therapy (WHO Analgesic Ladder)
The step-ladder approach for cancer pain management uses sequential escalation of analgesic intensity based on pain severity and adequacy of response. [1] Nonopioid analgesics are recommended as the initial step for mild pain. [1] Weak opioids are recommended when pain persists or worsens despite step 1 therapy. [1] Strong opioids are recommended when pain persists or worsens despite step 2 therapy. [1]
Medication Selection Algorithm
- Step 1 (mild pain): nonopioid analgesics with or without adjuvants. [1]
- Step 2 (mild to moderate pain or uncontrolled pain on step 1): weak opioids with or without nonopioids and with or without adjuvants. [1]
- Step 3 (moderate to severe pain or uncontrolled pain on step 2): strong opioids with or without nonopioids and with or without adjuvants. [1]
- Dose selection and escalation should be guided by pain severity, pharmacokinetics, contraindications, and adverse effects for the specific opioid. [1]
- Reassessment of analgesic benefit and harms should occur after dose changes to enable escalation to the next step when inadequate pain control occurs. [1]
Co-Analgesics and Adjuvant Therapies
Adjuvant analgesics (for example, agents used for neuropathic pain and other pain mechanisms) can be used at any step based on pain type. [1] Nonopioid and adjuvant medications may be continued when escalating opioids if they contribute to analgesia. [1] Non-drug interventions can be incorporated alongside pharmacotherapy for selected pain syndromes. [1]
Monotherapy Versus Combination Therapy
Combination therapy with a strong opioid plus a nonopioid can provide better pain reduction than alternative analgesic strategies in selected comparisons reviewed in the WHO evidence synthesis. [1] Continuation of nonopioids and adjuvants alongside opioids is supported when these agents contribute to overall analgesia or target specific pain mechanisms. [1]
Initiation Thresholds for Step Escalation
Escalation from step 1 to step 2 is recommended when pain persists or worsens despite step 1 therapy. [1] Escalation from step 2 to step 3 is recommended when pain persists or worsens despite step 2 therapy. [1] Opioid initiation and opioid intensity should be determined by clinical assessment of pain severity and adequacy of response to the current regimen. [1]
Target Blood Pressure
No blood pressure targets apply because the step-ladder approach is an analgesic selection strategy for pain control rather than an antihypertensive titration framework. [1]
Common Pitfalls to Avoid
Analgesic selection should avoid using opioid intensity that is not aligned with pain severity and response because the ladder is based on sequential escalation for inadequate relief. [1] Dose escalation should avoid ignoring patient-specific contraindications and adverse effects because dosing and choice should reflect these factors for safety. [1]
Treatment Goals
The analgesic ladder aims to achieve adequate analgesia with tolerable adverse effects by matching drug class intensity to pain severity and treatment response. [1] Sustained pain control should be maintained by ongoing reassessment and adjustment of analgesic choice and dosing. [1]