The Dos and Don’ts of Passing a Mouth Swab Test in 12 Hours

Passing a mouth swab test, also known as a saliva drug test, can be a daunting challenge, especially with limited time to prepare. These tests are common due to their ease of administration and ability to detect recent drug use. Here are some dos and don’ts to help you navigate this situation effectively if you have only 12 hours to prepare, read more on


  1. Stay Hydrated: Drinking plenty of water can help flush out toxins from your system. Hydration dilutes your saliva, potentially lowering the concentration of drug metabolites. Aim to drink several glasses of water throughout the day, read more on
  1. Practice Good Oral Hygiene: Brushing your teeth, gums, and tongue multiple times can help remove traces of drugs from your mouth. Use a strong antiseptic mouthwash to kill bacteria and further clean your oral cavity. Pay special attention to the insides of your cheeks and under your tongue.
  1. Use Detox Products: Specialized mouthwash products are available that claim to cleanse your mouth of drug residues temporarily. Follow the instructions carefully, typically involving swishing the mouthwash for a few minutes shortly before the test.
  1. Eat High-Fat Foods: Consuming fatty foods can potentially absorb and trap drug particles, preventing them from entering your saliva. Opt for foods like cheese, nuts, and avocados in the hours leading up to your test.
  1. Chew Gum or Mints: Chewing sugar-free gum or mints can increase saliva production, helping to wash away drug residues. It can also keep your mouth fresh, which is beneficial for oral hygiene.



  1. Avoid Drug Use: This may seem obvious, but abstain from using any drugs as soon as you know a test is imminent. The closer to the test you consume drugs, the higher the risk of detection.
  1. Don’t Skip Oral Hygiene: Neglecting to brush or rinse your mouth can leave drug residues intact, increasing the likelihood of a positive result. Consistent and thorough oral hygiene is crucial.
  1. Avoid Alcohol-Based Mouthwash: While mouthwash is important, those with high alcohol content can dry out your mouth, potentially increasing the concentration of drug residues. Opt for alcohol-free varieties.
  1. Don’t Smoke or Use Tobacco: Tobacco products can leave residues that might interfere with test results or exacerbate the presence of drug metabolites. Avoid smoking or chewing tobacco products before your test.
  1. Don’t Consume Pop Seeds: Foods containing poppy seeds can sometimes result in false positives for opiates. Steer clear of these foods in the hours leading up to your test.