Q: What exactly are urban legends? A: Urban legends are popular stories alleged to be true and passed from individual to individual via oral or written (e.g. forwarded email) communication.: What exactly are urban legends? A: Urban legends are popular stories alleged to be true and passed from individual to individual via oral or written (e.g. forwarded email) communication.
When a person gets injured, their brains release chemicals called opioids into the space between neurons that acts to dull the pain signals. The effect is seen the most in the brain regions called the ventral striatum, amygdala, midline thalamus, and periaqueductal gray.
Answer Wiki. Well, hydrocodone is an opiate and activates the opiate receptors in the brain, which when activated, release the hormone 'histamine'. Histamine is the same hormone released during an allergic reaction. When you hear of drugs like Benedryl, an anti-histamine, it neutralizes the histamine hormones and relieves the itching sensation.