Originally Posted by Omniscient

Four hours before 2 asparin, 2 tums, 4 cups of water.
Two hours before 2 asparin, 2 tums, 4 cups of water.
Right before you leave 4 asparin, 4 tums, 4 cups of water.

The acyllic acid in the asparin increases the metabolytes they test for in an assay test and the tums increase the gravity of the urin lost with dilution.