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12-24 Hours for TCH and 48 for meth and opi's

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12y ago
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Wiki User

13y ago

Saliva tests for marijuana can detect usage for 2 to 5 days prior.

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Wiki User

11y ago

(60 to 90) days.

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15y ago

up to four years

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Wiki User

13y ago

24 hours lol

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Wiki User

13y ago

30+days depending on how much u smoke

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13y ago

2-5 days

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Q: What is the furthest back a mouth swab can detect marijuana?
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