Three-step analgesic ladder treatment Why should we use this guideline? Three-step analgesic ladder regimen of the WHo is a widely accepted pharmacological therapy for cancer pain around the world. As long as we follow the basic principle, most of the pain will be controlled effectively and what elite is in it?Three-step analgesic ladder treatment • Why should we use this guideline? • Three-step analgesic ladder regimen of the WHO is a widely accepted pharmacological therapy for cancer pain around the world. As long as we follow the basic principle, most of the pain will be controlled effectively. • And what elite is in it?