A member asked:

How long would the drug roofies take to show up in a pee test and what effect would that have on a persons conduct.

A doctor has provided 1 answer
Dr. Ralph Morgan Lewis answered

Specializes in Family Medicine

"roofies"/Rohypnol/: Flunitrazepam begins to work in 15-30 min & effects last 4-12 hrs. Effects include loss of memory of events after taking the drug, sleepiness, psychomotor & cognitive impairment, & death if mixed with alcohol. Detection in urine depends on initial dose & which active metabolites are screened for. Active metabolite has half-life of 36-200 hrs.

Answered 6/1/2019

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