Naloxone is used for the emergency treatment of known or suspected opioid overdose. Serious opioid overdose symptoms may include unusual sleepiness, unusual difficulty waking up, or breathing problems (ranging from slow/shallow breathing to no breathing). Other symptoms of overdose may include... This medication belongs to a class of drugs known as opioid antagonists. It works by blocking the effects of the opioid in the brain. View More Info

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