If you haven't used meth for 3 months and i did less than a half a tenth and have a ua in 2 days can you flush it out of your system y then and if not what can do to pass it?

Meth can be detected in a urine test up to 5 days after use.. It can be detected in a hair sample up to 90 days after use. It is broken down by the liver. Your test should be negative at this time. No harm in drinking plenty of water prior to your test though.

A month after last use, your urine will be negative for meth. If you drink too much water, it will dilute the urine and the specimen may be rejected and you will then have to submit the sample again.