Short-term use of opioids increases subjective pleasure

The human opioid system contributes to the regulation of emotions, pleasure and pain. Opioids are strong analgesics. In addition to effectively relieving pain, external opioids may improve mood and reduce negative emotions. However, not much has been known about the effect of opioids on emotional responses caused by external stimuli.

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Got knee pain? What you need to know about alternatives to surgery

Arthritis in the knees can strike people as young as 45, with symptoms severe enough to limit activities and harm quality of life. What can be done about it?

* This article was originally published here