Simple really. Don't take them.
For passing urine drug screens and for cleansing toxins.
On tusdays
Good Detox drink, ask your friends, local smoke shop if you can.
Don't take drugs!
Which type of drug test? If it is a urine test, literally drink as much water as you can consume from now until you are tested, as that would be your best chance at passing.
Your urine was presumably stored at approximately 98.6 degrees before you put the sample in the cup. If the temperature is significantly lower, you probably stored the urine somewhere other than your bladder before you provided the sample.
The way to pass any drug test is not to take that drug. If you've already taken it, it's a bit late to be worrying about passing the test.
Staphisagaria one of a drug for this condition
There are no home remedies for passing a cocaine test. The only thing you can do is eat properly, and drink plenty of liquids to pass thru your system. Cocaine basically comes out of your system in a few days so the wait is not terribly long too be clean from the drug.
Meth stays in your system for about 72 hours. On a site on "passing urine drug screens" I read 3-5 days.
dye your hair
You can use a clean friend's urine, or some companies sell synthetic urine designed for tricking drug tests.