Smoking opioids associated with lower mortality than injecting but is still high-risk: Study
A new study published today in the scientific journal Addiction has found that opioid smoking appears to be associated with lower mortality risk compared with opioid injecting. The authors, however, caution that opioid smoking still carries a substantial overdose risk and that these results should not be interpreted as suggesting that opioid smoking is safe.
The study analysed substance use treatment data from 2006 to 2021, comparing 287,481 individuals who reported smoking opioids as their primary form of substance use and an equal weighted number of individuals who reported injecting opioids as their primary form of substance use. The outcome of interest was death during treatment, within one year of treatment admission.
The analysis found a mortality rate of 6.5 per 1000 person-years in the smoking cohort and 9.7 in the injection cohort. The mortality rate ratio was 0.67, meaning people who primarily smoked opioids died at two-thirds of the rate of people who primarily injected opioids.
Although smoking rather than injecting opioids may mitigate some risks, smoking opioids still carries a significant risk of death. Smoking recently surpassed injection as the most common route of administration identified among opioid-related fatal overdoses in the United States, likely driven in part by the rising popularity of opioid smoking and the decrease in opioid injecting.
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