It is if you suck on sour candy's for those two days along with brush your teeth , floss and use Listerine every night frequently the 48 hours leading up to it. At least I have seen this holds true for Mary Jane.
Is It True That Oral Swab Testing Can Only Detect The Presence Of Drugs Up To 48 Hours After Use?
www.drugtestingworld.com Oral swab can only detect most drugs up to 24-48 hours.. With the exception of Meth/Amphetamines.. Which it can detect up to 72 hours.