11 ng/ml is high but not actually insane for super druggies. If you are around 20 ng/ml you are probably dead 90+% of the time, but at 11 you may or may not die if you are a habitual user. Some people die around 11, if they are taking it on prescription for the first time.

11 ng/ml is high but not actually insane for druggies. That is kinda common for abusers. If you are around 20 ng/ml you are probably dead 90% of the time but at 11 you would probably survive if you are a habitual user.