One theory devised to explain near-death experiences is that they may result as a side effect from drug use.

Question

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While near-death experiences can occur without the use of drugs, some researchers have proposed that certain drugs may induce an altered state of consciousness that mimics aspects of near-death experiences. For example, ketamine has been shown to produce sensations of floating, out-of-body experiences, and encounters with mystical beings similar to those described in some near-death experiences. However, this theory is still debated and other explanations for near-death experiences also exist.

One Theory Devised to Explain Near-Death Experiences Is That They