Alcohol: 2 to 96 hours Amphetamines: 3 to 7 days Cocaine: 24 to 96 hours Marijuana: 2 to 84 days Heroin: 48 to 96 hours Opiates: 3 to 7 days PCP: 3 to 14 days

Try carrying a water bottle with you during the day and refill it as needed. Drink extra water on hot days and when you are physically active.

If you are concerned about withdrawal symptoms, go to a hospital or call your doctor. You may require a supervised medical detox if you cannot go without the substance.

For example, if your test is at 9:00 am, get up at 7:00 am and urinate right away.

For example, if your drug test is scheduled for 11:00 am, wake up by start drinking water by 9:00 am.

For example, if you start drinking water at 9:00 am, take a B-complex vitamin at the same time. You can purchase a bottle of B-complex vitamins at a grocery or drug store.

Don’t exceed the recommended dosage! Follow the manufacturer’s instructions for use. Coffee, tea, and cranberry juice also have mild diuretic effects if you don’t want to go out and buy diuretic pills.

Make sure that you are not being monitored if you try this! Getting caught tampering with your sample may result in an automatic fail, and depending on where you live, you could find yourself in legal trouble as well.

Keep in mind that there is very little you can do in the event that you have to go for a blood test right away.

Keep in mind that this is not foolproof. Hair follicle tests are meant to show whether you have been using substances over the last few months. If you have, then you might still fail a hair follicle test using this strategy.

Note that some employers may also test for alcohol if you are suspected of drinking on the job. There are also tests available for designer drugs, but these are not commonly administered.

For example, if you are getting a 5-panel test and you take a prescription amphetamine for ADD, then you would need to let the drug testing facility know this.

Foods that may contain poppy seeds include certain types of bagels, muffins, rolls, and cakes.

Taking goldenseal root. Adding bleach, ammonia, detergents, or vinegar to your urine Using synthetic urine. Drinking bleach or other household cleansers.