What effect do narcotic analgesics have on mood?

Narcotic analgesics are known to primarily act on the central nervous system to alleviate pain. One of their effects is the induction of euphoria, which occurs due to the activation of receptors in the brain that influence mood. This enhancement of mood can be a significant reason for their potential for misuse and addiction, as users may seek out the pleasurable feelings that accompany their use. Therefore, the correct choice is that narcotic analgesics can induce euphoria, reflecting their impact on emotional states and the reward pathways in the brain.