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bluemoon

LSD remain detectable

4 posts in this topic

Following ingestion, LSD remain detectable in the urine for

 

  A. 1-3 days   B. 2-8 hours

which one is correct,both answers are given at different courses

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LSD is used in small doses (50–100 µg) and it is extensively metabolized. The half-life is approximately 2.5–5
hours. After a dose of 4 µg/kg of LSD, the peak LSD plasma
concentrations were 7.4 and 9.7 ng/mL and fell below the LOD
(5 pg/mL) after 24 and 48 hours.40 Only 1% is excreted in the
urine unchanged. After a typical dose, LSD is detectable in
urine for 24 hours. The longest reported detection (after intake
of 50 µg), measured by RIA at a 100 pg/mL cutoff, was 80
hours.41 In urine, the peak LSD concentrations were seen after
10–12 hours and fell below the LOD (200 pg/mL) within 36
hours.42A few years ago, a new metabolite, 2-oxo-3-hydroxyLSD, which is present in much higher concentrations in urine,
was reported. Studies have shown that the mean ratio of 2-oxo-
3-hydroxy-LSD to LSD is 42.9 (the median ratio was 16.1).43
2-Oxo-3-hydroxy-LSD could be detected in urine for up to 96
 
 
MRCPsych mentor couse days of detection is more accurate and precise than others
 
 
so ans is :1-3 days

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