Table 1.
THC (μg/l) concentrations in expectorated oral fluid from 10 participants before and after smoking a single 6.8% THC cigarette.
| Time (h) | −0.5 | 0.25 | 0.5 | 1 | 2 | 3 | 4 | 6 | 22 |
|---|---|---|---|---|---|---|---|---|---|
| A | <LOQ | 641 | NC | 116 | 20.7 | 2.9 | 6.5 | 4.1 | <LOQ |
| B | 43.6 | NC | NC | NC | 313 | 205 | 245 | 90.4 | 10.3 |
| C | <LOQ | 2634 | 1383 | 263 | 382 | 33.6 | 36.4 | 39.0 | 2.5 |
| D | <LOQ | 3384 | 311 | 301 | 12.0 | 4.0 | 8.3 | 2.1 | 0.4 |
| E | 0.7 | 4436 | 527 | 238 | 15.9 | 13.5 | 7.7 | <LOQ | DC |
| F | <LOQ | 2624 | 1524 | 471 | 59.9 | 55.8 | 10.8 | 14.4 | DC |
| G | <LOQ | 2103 | NC | 508 | 31.7 | 2.9 | 2.1 | 0.9 | <LOQ |
| H | 1.8 | 22370 | NC | 1030 | 186 | 186 | 22.6 | 13.0 | 1.0 |
| I | 0.3 | 265 | 101 | 35.4 | 11.6 | 1.5 | 1.9 | 0.9 | DC |
| J | 7.1 | 2735 | 1296 | 284 | 1310 | 206 | 40.4 | 42.4 | DC |
| Median a | 1.3 | 2629 | 527 | 282 | 31.7 | 13.5 | 8.3 | 8.5 | 1.8 |
NC- not collected due to dry mouth; DC -discharged at 6 h from the unit;
<LOQ – below limit of quantification: THC – 0.25 μg/l;
a
Median – participant J excluded due to blood in oral fluid