Understanding the Possibility of False Positive Breathalyzer Results
Imagine being stopped by the police while driving, only to be informed that the officer believes you are driving under the influence of alcohol. You know you haven’t consumed any alcohol, yet the sobriety exercises and breathalyzer test indicate that your blood alcohol content (BAC) is above the legal limit. This scenario may seem implausible, but it can occur due to various factors.
The Science Behind Breathalyzer Tests
A breathalyzer is a device that analyzes a person’s breath to determine their BAC. The most common type of breathalyzer uses an electrochemical fuel cell to measure the chemical reaction that occurs when the body oxidizes alcohol into acetaldehyde. This reaction can be detected in the bloodstream for up to 24 hours.
However, any alcohol present in the mouth at the time of the test can also be detected, which can lead to false positive results. This can occur if you have recently consumed a product containing alcohol, such as mouthwash or certain medications.
Medications That Can Cause False Positive Breathalyzer Results
Certain medications contain methyl group compounds similar to ethanol, which can be detected by breathalyzers. These medications include:
* Asthma medications, such as albuterol, budesonide, and salmeterol, which can contain traces of methyl compounds.
* Over-the-counter cold medicines, such as Vicks and NyQuil, which may contain small amounts of alcohol.
* Oral gels used to treat canker sores and toothaches, which can contain anesthetics like Anbesol.
* Mouthwash and breath spray, which can contain alcohol and affect breathalyzer results.
Avoiding False Positive Breathalyzer Results
While false positive breathalyzer results are rare, it’s essential to take precautions to avoid them. If you are requested to take a breathalyzer test, inform the sample collector if you have recently consumed any medications or products containing alcohol. Unless you are abusing these products, it’s unlikely that a breathalyzer will give a false positive result.
Remember to always follow the rules and never drink before driving. If you are stopped by the police, be honest about any medications or products you have consumed, and ask for a blood test to confirm the results.