What is naloxone primarily used for?

Naloxone is primarily used to block the effects of opioids. It is an opioid antagonist, which means it binds to the same receptors in the brain that opioids do, but without producing the same effects. This property allows naloxone to reverse the life-threatening effects of an opioid overdose, such as respiratory depression and sedation. When administered, naloxone can quickly restore normal breathing and consciousness in someone who has taken an overdose of opioid medications or illicit substances, making it an essential tool in emergency situations related to opioid use.

The other options, while they pertain to different medical treatments, do not represent the function of naloxone. Alleviating pain is typically managed by opioids or specific analgesics, managing anxiety usually involves anxiolytic medications, and providing hydration is a function of intravenous fluids or oral rehydration therapy. Each of these options highlights different areas of medical care but does not apply to the primary use and intended effect of naloxone in opioid overdose situations.