Recently, new drugs for intractable chronic pain are available in Japan. The following articles describe topics of new drugs for intractable chronic pain including transdermal fentanyl, tramadol/acetaminophen combination tablets, buprenorphine transdermal patch, pregabalin, and duloxetine. Treatment of constipation in chronic pain patients and management of opioid induced nausea and vomiting are also described to prevent complication of pain-relief drug therapy.