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While it is generally safe for short-term use, the long-term effects are not well understood

PubMed laboratory research record [PMID: 1700569] PubMed record related to this compound for laboratory literature review

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Potential for stronger effect: Because the bioavailability (the fraction of the administered dose that reaches circulation) can be higher via injection, the impact on sleep architecture (e.g., slow-wave sleep increases) may be more pronounced