Lorenzo Napolitano, Attorney at Law

Can diabetes cause a false positive on a breath test?

2026-09-28T16:46:37Z

If you have diabetes and face a drunk driving charge, you may wonder whether your medical condition affected the breath test result. Breath tests measure alcohol in your system. Certain metabolic processes can complicate how some tests read compounds in your breath.

Can Diabetes Affect a Breath Test?

Having diabetes does not automatically mean that a breath test produced a false positive. The test is designed to measure ethanol, the type of alcohol found in beer, wine and liquor. However, people in ketosis, including those with diabetic ketoacidosis, may have elevated acetone levels in their breath. Acetone is chemically different from ethanol. Whether acetone can interfere with a breath test depends on the technology used to measure and distinguish different compounds. The extent of any interference can vary by instrument and testing method.

When Does Acetone Become Relevant to Testing?

Acetone can appear in the breath when the body burns fat instead of glucose. This can occur during prolonged fasting, low-carbohydrate diets or ketosis associated with diabetes. Diabetic ketoacidosis is a serious condition in which ketone levels can rise to dangerous levels. Not every person with diabetes has elevated acetone at the time of a traffic stop. Medical records showing ketosis or related symptoms around the time of testing may help determine whether the condition was relevant to the result.

Can a Breath Test Result Be Challenged?

You can examine the result along with the device used, testing procedures and calibration records. New York law governs chemical testing in DWI cases. State regulations set further requirements for approved instruments, testing procedures and equipment maintenance. A diabetes diagnosis does not automatically invalidate a breath test result. If medical records show ketoacidosis or ketosis near the time of arrest, that evidence may provide grounds to examine the reliability of the result.

What Medical Records May Matter?

Preserving medical records and identifying when symptoms occurred relative to the stop can help evaluate breath-test evidence. A New York DWI defense attorney can review the results and your medical history to assess how your health may affect the evidence against you.

Can a DWI affect your professional license in New York?

2026-09-16T11:17:43Z

A DWI charge can cause problems beyond criminal court. If your job requires a professional license, you may worry about losing the right to work. The effect of a DWI depends on your profession, the licensing agency and the facts of your case.

How a DWI can affect your license

New York handles professional licensing separately from criminal penalties. A DWI charge does not automatically mean you will lose your license. However, the underlying conduct or a resulting conviction may raise licensing concerns, depending on the profession and applicable rules. For professionals regulated by the New York State Education Department, professional misconduct can include practicing while impaired by alcohol or being convicted of a crime. The rules and possible penalties depend on your profession and the details of your case.

What licensed workers should understand

The effect of a DWI may depend on your job and the rules for your license. Important factors include:

Your type of license: Each profession has its own licensing and discipline rules.
The case outcome: An arrest, pending charge and conviction may have different effects on your license.
Your work duties: The licensing agency may consider whether the conduct affects your ability to work safely.
Reporting rules: Some professions require workers to report criminal convictions or other conduct.
Possible discipline: Depending on the facts, the agency may issue a reprimand, fine, suspension or probation.

What happens after a DWI arrest?

If you hold a professional license, review the rules for your specific profession. A dismissal or other favorable result in criminal court may not end a licensing matter. The licensing agency may have separate rules about professional conduct. A DWI does not automatically end your professional career. However, failing to follow licensing rules can create more problems. Reviewing the rules early can help you understand your reporting duties and possible disciplinary action.

Is a roadside breath test enough to prove a DWI in New York?

2026-09-02T10:40:42Z

A roadside breath test alone generally cannot prove a New York DWI. It is only one piece of a larger investigation, and its significance depends on the evidence surrounding the stop and arrest. What happens after that roadside test can shape the strength of the entire case.

What does a New York officer use a roadside breath test for?

A New York officer may use a Portable Breath Test (PBT), or Alco-Sensor, during a traffic stop. This small device helps the officer decide whether to make a DWI arrest. A roadside reading is different from an evidentiary BAC test given at a police station. Mouth alcohol, temperature changes and calibration problems can affect a portable reading. These issues do not automatically defeat a DWI case, but they may raise questions about the result. An officer may also consider driving behavior, speech, appearance, field sobriety tests and other observations. The roadside number is only one part of the investigation. The arrest report, body-camera footage, field sobriety results and any later chemical test may carry greater importance in the case.

Evidence that can still prove a DWI charge without a roadside test

A missing roadside PBT does not end a New York DWI case. It may leave prosecutors with less evidence to establish impairment. A per se DWI relies on chemical proof of BAC. A common-law DWI under Vehicle and Traffic Law § 1192(3) requires proof of actual impairment. Prosecutors may rely on:

Driving behavior: Alleged unsafe or erratic driving.
Physical signs: Slurred speech, bloodshot eyes, poor coordination or alcohol odor.
Field sobriety tests: Results from roadside tests.
Statements: Comments made during the stop.
Video: Body-camera or dash-camera footage.
Chemical testing: Later breath, blood or urine results.

The defense can challenge the reliability and context of this evidence. Video may contradict an officer's account, physical signs may have innocent explanations and testing errors may affect chemical results. The timeline also matters. Inconsistencies between the stop, arrest and later testing may weaken the prosecution's claim of impairment. A missing PBT does not decide the case, but weaknesses in the remaining evidence may support a strong defense.

Why the full DWI evidence matters

A roadside breath test is only one part of a DWI investigation. The case record may include the stop report, arrest paperwork, chemical-test records, calibration, and maintenance records and video footage. Testing errors, improper procedures or gaps in an officer’s observations may weaken the prosecution’s evidence. A DWI attorney can examine these details and assess whether the evidence truly supports the charges.

How food intake affects blood alcohol test accuracy

2026-08-18T07:30:09Z

Eating a full meal before driving can slow alcohol absorption. However, food does not always make a breath or blood test inaccurate. The amount and timing of food and alcohol, along with the test method, can affect the results.

Does eating change how alcohol enters the bloodstream?

The stomach cannot stop alcohol from being absorbed, but it can slow the absorption process. Alcohol can reach peak blood levels faster on an empty stomach, while a meal may delay that peak by 30 to 90 minutes. However, food does not change the total amount of alcohol consumed and a person can still reach or exceed legal limits after eating.

Does food change how tests measure alcohol?

Alcohol tests measure the amount of alcohol in the blood when the test occurs. Food in the stomach does not change that amount. For example, a BAC of 0.10 percent two hours after drinking shows the alcohol present when the sample was taken. Timing can affect BAC results. Alcohol may continue to absorb after a traffic stop, so a later test may not reflect the BAC while driving. Required observation periods also matter because failures to follow testing procedures may affect result reliability.

What factors actually affect test reliability?

Test accuracy depends on proper setup and use. Breath machines require regular care and checks. Blood samples need correct storage and chain of custody. Officers must follow specific steps during collection. Errors in any step can produce inaccurate readings, regardless of what the person ate. Medical conditions and certain substances can interfere with readings. Diabetes, acid reflux and mouth alcohol caused by burping, acid reflux or residual alcohol in the oral cavity can affect breath test readings. Blood tests face contamination risks if staff do not properly clean the draw site. These issues create grounds to challenge DUI charges in court.

What to know about food, BAC and challenging test results

Food intake alone is unlikely to serve as a complete defense to drunk driving charges. However, the timing of food and alcohol consumption can be relevant to questions about what the BAC was at the time of driving compared to the time of testing. Depending on state law, courts may focus on BAC at the time of driving or at the time of testing. When time passes between driving and testing, BAC levels at each point may differ. Food, alcohol absorption and testing delays can affect that difference. A strong defense may examine test records, officer training and testing procedures to identify reliability issues that could weaken the prosecution’s evidence.

What happens at a DMV hearing after a DWI arrest?

2026-08-03T00:33:31Z

Being arrested for driving while intoxicated (DWI) in New York can trigger more than a criminal court case. You may also face administrative proceedings involving your driving privileges. One of the first questions many drivers ask is what happens at a Department of Motor Vehicles (DMV) hearing and how it could affect their license. Understanding this process can help you prepare for what comes next.

Why a DMV hearing is separate from your criminal case

A DWI arrest can lead to both criminal charges and administrative consequences. While the criminal court determines whether you violated New York's DWI laws, the DMV addresses issues involving your driving privileges.

Because these proceedings serve different purposes, the outcome of one does not always determine the outcome of the other.

For example, your driver's license could be suspended or revoked even while your criminal case is still pending.

What issues may be addressed?

The purpose of the hearing depends on the circumstances surrounding your arrest.

The DMV may consider issues such as:

Whether you refused a chemical test
Whether the arresting officer followed required procedures
Whether sufficient evidence supports administrative action against your license

These hearings generally focus on a limited set of legal and factual issues rather than determining criminal guilt.

What evidence may be presented?

The DMV may review several types of evidence during the hearing, including:

Police reports
Testimony from the arresting officer
Chemical test records
Documentation regarding the traffic stop and arrest

Depending on the circumstances, you or your attorney may have the opportunity to challenge evidence or question witnesses.

Possible outcomes

The result of a DMV hearing depends on the facts of your case.

Possible outcomes may include:

Suspension of your driving privileges
Revocation of your driver's license
Reinstatement of your driving privileges
Other administrative actions permitted under New York law

Even if your license is suspended, you may have options depending on your eligibility and the specific facts of your case.

Prepare for every stage of your case

A DMV hearing can significantly affect your ability to drive to work, school and other daily responsibilities. Because these proceedings involve strict rules and important legal rights, preparation matters.

An experienced New York DWI defense attorney can explain the hearing process, protect your interests and help you pursue the best possible outcome for both your license and your criminal case.

What happens to your license if you refuse a chemical breath test?

2026-07-14T17:00:55Z

Refusing a chemical breath test in New York can lead to serious consequences for a driver’s license. Under the state’s implied consent law, operating a vehicle already means you have agreed to chemical analysis if the police suspect you were driving a vehicle while impaired or intoxicated. The effects generally apply to refusing an authorized chemical test after an arrest. A roadside portable breath test might involve different rules and consequences.

Aftermath of a refusal

Refusing an authorized chemical test could trigger a separate administrative process involving the driver’s license, even if the person also faces a DWI charge. The consequences for refusal can happen long before you are convicted of a crime. At the arraignment, the court might temporarily suspend your driver’s license while the refusal matter proceeds to a Department of Motor Vehicles (DMV) hearing. Potential penalties for first-time refusal of a breathalyzer test could include:

License revocation: If the DMV confirms the refusal, a first refusal may result in license revocation for at least one year. Longer periods may apply in certain situations.
Civil penalties: A refusal finding can result in a mandatory civil penalty. The amount may depend on the driver’s history and other circumstances.
Limited driving privileges: A refusal-related revocation may affect eligibility for a conditional license or other limited driving privileges.
Separate DWI case: Refusing the chemical test does not automatically prevent a DWI prosecution. Prosecutors may rely on officer observations, driving behavior, field sobriety test results, video footage and other available evidence.

After arraignment DMV generally schedules a refusal hearing to determine whether the license revocation should take effect. The hearing is typically scheduled within 15 days, although scheduling and adjournment might affect the timeline. At the hearing, a DMV administrative law judge evaluates whether the police officer had reasonable grounds for the stop, provided proper refusal warnings, conducted a lawful arrest and the driver refused the test. The license penalties will be sustained if the evidence supports all these criteria.

Protecting your future

Refusing a breath test doesn’t protect you from DWI; it only makes the legal situation more complicated. If you are facing a similar charge and want to protect your peace and future, seeking the guidance of a skilled legal professional could explain how the refusal proceeding and DWI charge may affect a driver’s options.

Can you drive for work with a conditional license in NY?

2026-06-29T14:19:06Z

A DWI conviction in Rochester can threaten your employment if you cannot drive to your job. New York law offers an option through a conditional license, which restores limited driving privileges. However, this license comes with very strict rules for its use.

What a conditional license allows for work travel

A conditional license is not a full restoration of your driving privileges. Its main purpose is to allow necessary travel, such as commuting to and from your place of employment. Courts can also permit driving for medical appointments, school or court-ordered programs. The license terms often detail the specific hours and even the routes you can take. For DWI-related offenses, New York law mandates installation of an Ignition Interlock Device (IID).

Managing daily commutes and job duties

Using the license and IID during your daily commute requires careful planning. You must strictly follow the approved travel times and routes. An unexpected detour or a late shift could result in a violation. The IID also adds another responsibility, requiring you to provide a breath sample before starting the car and at random intervals while driving. Staying within these restrictions requires careful schedule management.

Common violations that risk your driving privileges

Failing to follow these rules can lead to serious consequences. A court may consider even a minor deviation a violation, which could result in the revocation of your conditional license. Common mistakes include:

Driving outside of permitted hours or for non-approved reasons
Failing a breath test on the IID or attempting to tamper with it
Having another person provide a breath sample for the IID
Driving a vehicle that does not have an IID installed

Any of these actions can lead to the immediate loss of the license.

Protecting your ability to work

A conditional license is an important tool that allows you to maintain your livelihood after a DWI. Protecting this privilege means understanding every detail and limitation imposed by the court and the DMV. Since the terms can vary, knowing your specific restrictions is the most important step in protecting your job and your driving future.

How accurate are breathalyzer tests?

2026-06-22T14:50:12Z

If you have been charged with driving while intoxicated (DWI), one of the most important pieces of evidence against you may be the result of a breathalyzer test. You may think these devices are infallible, and there is no use in challenging the results. Like any technology, breathalyzers can produce inaccurate results under certain circumstances. Understanding how breathalyzers work and what can affect their accuracy can help you better understand your rights and options.

Factors that can affect breathalyzer results

Breathalyzer devices estimate a person’s blood alcohol concentration (BAC) by measuring the amount of alcohol in their breath. The device uses a mathematical formula to convert the alcohol detected in a breath sample into an estimated BAC reading. Drivers age 21 and older are considered legally intoxicated if their BAC is 0.8% or higher. Commercial drivers are subject to a lower legal limit of 0.4%, and drivers under 21 are subject to the state’s zero-tolerance laws. Law enforcement officers may use a portable breath test during a traffic stop to determine a driver’s BAC. Breathalyzer tests can be reliable, but they’re not 100% accurate. Furthermore, the result it provides is only an estimate of BAC and not a direct measurement of alcohol in the bloodstream. Several issues can result in inaccurate or misleading breath test readings, such as:

Improper calibration or maintenance: It’s essential to calibrate regularly, service and inspect breathalyzer devices to ensure reliability and accuracy.
Operator error: Law enforcement officers must follow specific procedures when administering a breath test. Administering the test incorrectly or failing to observe the driver for the required period before testing can affect the results.
Medical conditions: Certain conditions may affect the device’s accuracy. Acid reflux, gastroesophageal reflux disease (GERD), diabetes and some low-carb diets can sometimes cause elevated readings.
Environmental factors: Exposure to paint fumes, solvents or other volatile compounds may influence a breathalyzer reading

Breathalyzer results can be challenged in court, which is why you should contact a legal representative if you are charged with DWI. They can investigate whether the traffic stop was lawful, whether the testing procedures were followed correctly and whether the device was properly maintained and calibrated. Their assistance may help improve the outcome of your case.

Beware of DWIs during 100 days of summer

2026-06-16T14:50:23Z

With upcoming summer celebrations and vacations, many New York residents are enjoying warm-weather activities like barbecues and picnics. As these gatherings are likely to include alcoholic beverages, it’s important to realize that now is a time for increased driving dangers and the risk of DWI charges. Known colloquially as the “100 Deadliest Days,” the days bookended by Memorial Day weekend and Labor Day are considered especially dangerous for several reasons. Read on to learn more.

It’s a celebratory time

There are lots of holidays within this timespan — Memorial Day, Flag Day and our 250th national birthday, the Fourth of July and Labor Day. All these celebrations tend to be enjoyed along with a cold beer or other alcoholic libation. But consumption spells trouble on the roads.

The traffic volume swells

Families and individuals swarm the highways on their way to vacation destinations, making driving more challenging. This is also the time for road repair crews to be out in force, lowering speed limits in some areas and increasing gridlock.

Lots of young drivers on the roads

Teenagers with their newly issued driver's licenses are also exploring their newfound freedom behind the wheel. Their inexperience can be magnified if alcohol or drugs are thrust into the mix.

Law enforcement has robust response

Police officers are out in full force to enforce New York’s DWI laws now. Special grants and other funding get tapped to put more law enforcement officers on patrol for speeders and drunken drivers. Drinking even one beer enhances your risk of arrest on drunken driving charges. Motorists, if you get stopped on suspicion of DWI, please know that the case against you begins with the traffic stop. Knowing your rights and responsibilities under New York law could improve your chances of avoiding arrest and/or conviction.

Legal marijuana can still lead to DUI charges

2026-06-01T20:16:31Z

Like many other states, New York has legalized marijuana for recreational purchase purposes. There are still some restrictions in place, such as the fact that only adults who are 21 or older are allowed to purchase or use marijuana recreationally. But marijuana is not strictly illegal and can be purchased at dispensaries. Even though recreational use is legal, it is important for people to remember that it is still illegal to drive under the influence. Doing so could result in DUI charges. The government directly notes that neither drivers nor passengers should use cannabis or have open products in the vehicle. In other words, if you get pulled over while under the influence of marijuana, you may argue that you are over 21 and that you purchased the products legally, but you could still face serious charges.

Additional driving restrictions

Another thing to remember is that you cannot cross state lines with marijuana in your possession. This is because it is still illegal federally. If you are driving out of New York and into a neighboring state, or returning to New York, you could face significant charges if you are caught with these products in your vehicle. You may not end up being charged with a DUI if you were not actively under the influence at the time, but transporting these products across state lines is still illegal in its own right.

Legal defense options

Marijuana legalization has significantly changed the laws in New York and across much of the country, but there are still many marijuana-related violations that drivers need to be aware of, including DUI charges. If you are facing charges, you also need to know what legal defense options you have.