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In about 6 hours less than 1% should remain. After about 12 hours there will be a few nanograms left, and after a day you are mos def able to pass a drug test. It doesn't really get Into the circulatory system if you are worried about them finding out you have Asthma the aerosol will show up much later. And they actually test for the aerosol at most places. Just ask your high school chemistry teacher if your concerned.

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12y ago

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