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Toxicological assessment of the role of alcohol and drugs in drug-facilitated sexual assault cases in New Zealand.

J Anal Toxicol. 2020 Mar 11;:

Authors: Poulsen H, McCarthy MJ, Baker J, Verma A, Moir HJ, Brodie T, Thatti B, Trotter G, Rooney B

This report details the toxicology profile of victims of drug facilitated sexual assault (DFSA) in New Zealand from 2015-2018. This study represents all of the toxicology results for DFSA cases in New Zealand during this time period, of which there were 161 cases. Blood and urine samples were screened for legal and illicit drugs in addition to testing for alcohol and correlating alcohol concentration with sampling delay. Our results indicate that increased delay in sampling time resulted in a corresponding decrease in alcohol concentration. In victims who had declared alcohol use but of which none was detected, the average sampling time was 14 hours for blood and 17 hours for urine which is in excess of the average sampling delay for even the lowest alcohol positive samples. The most frequently detected alcohol concentration was in the range of 51-80mg/100ml for blood and 121-200mg/100ml for urine with an average sampling time of 8.5 and 6.5 hours respectively. We also examined acetone concentrations in alcohol positive samples and our results indicate that 82% of blood alcohol positive samples contained acetone at concentrations between 5-10 mg/L and 68% of alcohol positive urine samples contained acetone at a concentration greater than 20 mg/L. It may be that the nature of sexual assault affects an individual’s metabolism of alcohol and results in increased acetone production. Cannabis was the most commonly detected illicit drug, followed by methamphetamine. In relation to medicinal drugs there was a high usage of antidepressants and antipsychotics suggesting the victims may have been people of vulnerable personality. Based on case information it does not appear there are any cases where stupefaction by unknown administration of a drug has occurred, instead loss of consent through voluntary alcohol and drug consumption is more common and poses a greater risk than surreptitious drug administration.

PMID: 32159218 [PubMed – as supplied by publisher]

Source: ncbi 2

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