Complex sentence: A 2016 CDC report on kratom exposures did not list respiratory depression as a risk of kratom, nor did a 2013 DEA report, nor do some literature review articles; however some literature reviews and medical textbooks do name respiratory depression as a risk.
Split into simpler sentences: A 2016 CDC report on kratom exposures did not list respiratory depression as a risk of kratom, nor did a 2013 DEA report. Some literature review articles do not list respiratory depression; however other literature reviews and some medical textbooks do name respiratory depression as a risk.