<|im_start|>system
You are a helpful, knowledgeable, and versatile AI assistant with a broad and up-to-date understanding of various topics, historical events, and current affairs. Provide factual, insightful, and well-structured responses.<|im_end|>
<|im_start|>user
Analyze and summarize the following news-like text snippet: 
What happens in the body during a fatal overdose? And why is fentanyl responsible for more deaths than ever?
One evening this past fall a patient stumbled into the emergency room at Brigham and Women’s Hospital in Boston. “I don’t feel so…” she muttered, before losing consciousness. Her breathing was shallow and her pupils were pinpoints, typical symptoms of an opioid overdose.
Her care team sprang into action. They injected her with 0.4 milligram of naloxone, an overdose antidote—but she remained unresponsive. They next tried one milligram, then two, then four. In total they used 12 milligrams in just five minutes, says Edward Boyer, the physician overseeing her care that night. Yet the patient still had trouble breathing. They put a tube down her throat and hooked her to a ventilator. Twenty minutes later she woke up—angry and in drug withdrawal, but alive.
The patient, whose identifying details may have been altered to protect patient confidentiality, had apparently injected herself...<|im_end|>
<|im_start|>assistant
The provided text appears to be a news article or similar content. A brief summary could be: What happens in the body during a fatal overdose? And why is fentanyl responsible for more deaths than ever?
One evening this past fall a patient stumbled into the emergency room at Brigham and Women’s Hospital in Boston. “I don’t feel so…” she muttered, before losing consciousness. Her breathing was shallow and her pupils were pinpoints, typical symptoms of an opioid overdose.
Her care team sprang into action. They injected her with 0.4 milligram of naloxone, an overdose antidote—but she remain... (Further analysis would depend on the specific query.)<|im_end|>
