Cocaine: Cocaine produces peak blood levels within 15 minutes, and can be detected in blood for about 12 hours after use. Urine tests for byproducts of cocaine, which may remain positive for 2-3 days in people who use infrequently. In frequent users, urine stays positive for 2 weeks after last use; hair can remain positive for several months. Please tell your doctors so they can better help you & baby.
Answered 6/24/2014
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