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In adults: the half life of the medicine (time it takes 1/2 to disappear) is 11.2 hours (Immediate release range: 6.3 to 26.9 hours; Extended release range: 10.7 to 15.8 hours); Orally-disintegrating tablet: Mean: 12.5 hours (range: 7.9 to 19.2 hours). Typically, 4 half lifes is the accepted number for one to assume that the medicine is nearly indetectable
There is some variation with these factors as well, as you can see:
Alcoholic liver disease: half life = 19.7 hours (range: 5.8 to 65.3 hours)
Obesity: half life =21.8 hours (range: 9.9 to 40.4 hours)
Elderly: half life = 16.3 hours (range: 9 to 26.9 hours)
so, as long as you haven't taken any within 2 full days, 48 hours, of testing, and you don't have any of the other lengthening characteristics as above, it is not expected to appear in your urine.
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