If a drug test was taken on a Friday, results for most standard lab-based urine drug tests are typically available within 1–3 business days for negative results, which usually means hearing back by Monday or Tuesday of the following week, assuming the lab is open on weekends and there are no delays. Positive test results, or tests requiring confirmatory analysis, may take up to 4–6 business days, so results could be received by the end of the following week in such cases.
For other types of drug tests:
- Hair tests can take 2–3 days for negative results, and up to a week for positive results.
- Blood tests generally return results in 1–5 business days.
- Instant or point-of-care tests can give results within minutes, but these are less common for official lab testing.
Delays can occur if further confirmation is needed or if the test was conducted close to the weekend, as many labs do not process samples on Saturdays or Sundays.
In summary, for a Friday drug test:
- Negative urine test: likely 1–3 business days (Monday or Tuesday)
- Positive or confirmatory urine test: up to 4–6 business days (end of the following week)
- Hair/blood tests: generally longer, especially for positives.