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Drug detection times for different biologic specimens used in drug testing.
*Very broad estimates that also depend on the substance, the amount and frequency of the substance taken, and other factors previously listed.
†As long as the patch is worn, usually 7 days.
‡7–10 days after use to the time passed to grow the length of hair, but may be limited to 6 months hair growth. However, most laboratories analyze the amount of hair equivalent to 3 months of growth.
