Drink Fluids
One of the simplest ways to do before a drug test is to drink a lot of fluids. Make sure to drink at least 10 cups of water per day. This can increase the metabolic rate and help the body flush all of the residues and increase the chance of getting a negative result. However, avoid overdrinking because it would damage some internal organs and lead to a few health issues. This is also known as water intoxication. [6]
