Table II.
Mean Detection Times and Ranges of Positive ∆9-THC-COOH (≥15 ng/mL) Urine Specimens following Oral and Vaporized Cannabis Administration
| Dose (mg) | Time (h) | n |
|---|---|---|
| Oral: detection time (h) to first positive | ||
| 10 | 3.8 (1.0–6.0) | 20 |
| 25 | 2.9 (1.0–4.0) | 21 |
| Oral: detection time (h) to last positive | ||
| 10 | 6.5 (4.0–8.0) | 20 |
| 25 | 7.9 (6.0–8.0) | 21 |
| Vaporized: detection time (h) to first positive | ||
| 5 | 2.3 (1.0–5.0) | 9 |
| 20 | 1.8 (1.0–4.0) | 16 |
| Vaporized: detection time (h) to last positive | ||
| 5 | 5.9 (4.0–8.0) | 9 |
| 20 | 6.3 (2.0–8.0) | 16 |