Swab testing can detect most drugs up to 48 hours with the exception of Meth.. It can detect meth up to 72 hours.
Swab tests can detect marijuana for up to 72 hours(3 days), but it's always a good idea to quit smoking 5-7 days before your swab screening just to make sure all traces of the drug has been removed via mouth cells. Brushing the walls of your mouth and using mouthwash regularly can speed the process, but not by much. Later dopers :)- ~
Does Carbo work for swab test