Medical readiness to drive: a health guide for new drivers before the permit
How health conditions affect driving and what to ask the doctor and DMV before the permit
Picture a 15 year old who has managed type 1 diabetes since grade school. The permit test is a month away. What if a low hits on the highway? Does the Department of Motor Vehicles (DMV) need to know?
The months before the learner’s permit are the best time to ask. A clinician can adjust treatment and build a driving plan before the first lesson.
A diagnosis rarely settles the matter. The American Diabetes Association (ADA) states that having diabetes is not enough, on its own, to judge driving safety [2]. Still, Children’s Hospital of Philadelphia (CHOP) notes that some conditions can slow reactions or make the controls harder to use [1].
Below, you’ll find each major condition, who decides what, and tools to bring to the appointment.
How clinicians judge readiness to drive
Traffic medicine clinicians and driver rehabilitation specialists focus on function, not labels. They ask four questions:
- Seeing: Can you see clearly, across a wide enough area?
- Staying aware: Will you stay alert and conscious for the whole trip?
- Thinking: Can you spot hazards, decide and react in time?
- Moving: Can you work the pedals and wheel and turn to check blind spots?
They also ask whether the condition is stable.
Vision: more than reading the chart
The National Highway Traffic Safety Administration (NHTSA) treats 20/40 as the usual standard for sharp central vision, though states set their own rules [3]. California, for example, screens for 20/40 with both eyes together, plus 20/40 in one eye and at least 20/70 in the other [8]. People who fail may need an eye specialist’s report and a driving test. Some get a restricted license [8].
If you need glasses or contacts to pass, your license will likely require them, as in Pennsylvania [7].
NHTSA also tells clinicians that crashes track more closely with lost side vision, poor contrast sensitivity and slow visual processing [3]. Contrast sensitivity lets you spot a gray car on a gray, rainy road.
Voluntary guidelines from NHTSA and state licensing officials, published in 2009, say drivers should be able to tell signal colors apart [9]. In a CHOP study, young adults with amblyopia (“lazy eye”) or one useful eye were less likely to get licensed. Once licensed, though, their crash risk was not higher [1].
Practical steps: Get a full eye exam in the year before the permit. Mention glare, night blur or double vision, even if you passed the screening.
Seizures and epilepsy
A seizure that affects awareness means no one is steering. At 45 mph, a car covers about 66 feet per second (our calculation). A 5 second lapse means about 330 feet with no one in control, roughly the length of a football field.
What clinicians weigh: the seizure type, whether it affects awareness, time since the last seizure, recent medicine changes and whether you take every dose.
State rules: NHTSA reports that required seizure free periods range from 3 to 18 months, depending on the state [3]. The Epilepsy Foundation says many states now use 3 to 6 months. Some still require a year or more [4]. Many allow exceptions, such as seizures only during sleep. Some offer daytime only licenses [4].
Medicines: CHOP notes that antiseizure medicines can cause sleepiness or irritability. It advises sticking to the treatment plan [1]. NHTSA warns that stopping them may bring on a new seizure [3]. Plan any medicine change with your doctor, ideally when you don’t need to drive.
Honesty matters: The Epilepsy Foundation warns that denying seizures on a license form could leave you with an invalid license and legal liability [4]. Keep a seizure log for every visit.
Sleep: the overlooked risk
Teens need 8 to 10 hours of sleep a night, says the American Academy of Sleep Medicine (AASM) [5]. NHTSA notes that many teens fall short just as their biological need for sleep rises [3]. In 2024, 644 people died in drowsy driving crashes. Experts agree official counts understate the problem [3].
Narcolepsy causes extreme daytime sleepiness and sudden sleep episodes. Some also have cataplexy, sudden muscle weakness triggered by strong emotions. Symptoms usually begin between ages 7 and 25 [6]. The 2009 guidelines advise against driving unless treatment succeeds [9].
Sleep apnea makes breathing stop and start during sleep. Signs include loud snoring and gasping. Children may also have trouble paying attention [6]. Large tonsils, obesity and family history raise the risk [6]. For sleep apnea with daytime sleepiness, NHTSA guidance says to drive only while treatment is working and in use [3].
Practical steps: Don’t start a drive if you feel sleepy. Pull off to a safe spot if drowsiness hits [5]. Coffee and a 20 minute nap help only briefly [3]. Tell your clinician if you doze in class despite enough time in bed.
Diabetes: a driving routine for lows
For most people with diabetes, a reading below 70 milligrams per deciliter (mg/dL) counts as low [6]. Lows can cause shakiness and confusion. Severe lows can cause seizures or passing out [6]. Repeated lows can dull the warning signs, a problem called hypoglycemia unawareness [6].
The 2009 guidelines say insulin use alone should not bar driving, but lows without warning signs are not compatible with it [9].
Use this routine, and ask your diabetes team to set your personal numbers:
- Before every drive: Check your glucose. If it is low, treat it and wait until you reach a safe level [2]. The National Institutes of Health (NIH) advises 15 to 20 grams of fast acting sugar, then a recheck in 15 minutes [6].
- Stock the car: Keep glucose tablets or juice, snacks, glucagon and spare supplies within reach. Wear a medical ID [2].
- On long trips: On drives over 2 hours, recheck at regular stops, as a Veterans Affairs (VA) guide advises [10].
- If you feel low: Pull over safely first, then check and treat [2].
- After a low: Wait until both your glucose and your clear thinking return, which the VA guide says often takes 60 to 90 minutes [10].
A glucose monitor with alarms is a helpful backup, not a replacement for this routine. After a low that needed someone else’s help, talk with your team before driving.
Fainting and heart conditions
The American Heart Association (AHA) says vasovagal syncope, the most common type of fainting, often affects children and young adults and is usually harmless [11]. Warmth, nausea or lightheadedness often comes first. AHA notes no driving limits for people with this type who have gone a year without fainting [11].
Some fainting needs a heart workup before driving. Red flags include fainting during exercise, with a racing or irregular heartbeat, or with a family history of sudden death [11].
For heart rhythm problems, NHTSA advises a driving break until symptoms are controlled [3]. A new defibrillator or pacemaker typically means at least a short pause [3]. CHOP notes that some teens with congenital heart disease also face challenges with planning, attention or coordination [1].
Medicines, mental health and substances
The Food and Drug Administration (FDA) warns that some medicines cause drowsiness, blurred vision, dizziness, slowed movement, fainting or trouble focusing [12]. Its list includes antiseizure drugs, sleep aids, opioids, antidepressants, anxiety drugs and many allergy medicines. Key FDA points for new drivers [12]:
- Allergy medicines called antihistamines can slow reactions even when you don’t feel drowsy.
- Some sleep medicines can affect driving the next morning.
- Take a new nonprescription medicine first when you won’t need to drive.
Your prescriber may be able to change the dose, timing or medicine [12]. Never stop a prescribed medicine on your own to feel sharper behind the wheel.
Mental health: A 2024 CHOP study of about 89,000 young patients looked at depression and bipolar disorder. Young people with these conditions were 30% less likely to get a license [1]. Once licensed, their crash rates were 16% higher at 12 months and 19% higher at 48 months [1]. The study did not look at medicines. The lesson is to pair good treatment with extra practice, not to keep them off the road.
Substances: Alcohol, marijuana and other drugs slow coordination, judgment and reaction time. Mixing them can magnify the effects [3]. Driving impaired by any substance, legal or not, is illegal in every state [3].
Concussion and other conditions
Concussion: Symptoms can include feeling slowed down, poor concentration, dizziness, light sensitivity and vision problems [13]. In a University of Georgia simulator study, 14 college age drivers still showed lane weaving and poorer vehicle control within 48 hours after symptoms ended [14]. The lead researcher notes that no formal return to driving guidelines exist for concussion [14]. Make driving one of the last steps back, after school and sports. Get your clinician’s OK, then restart with short daytime drives with a parent.
Hearing loss: Deaf and hard of hearing teens can drive. CHOP suggests extra mirror checks, hearing technology and vehicle alerts you can see or feel [1].
Other conditions: CHOP also lists certain cancers as worth discussing [1]. Pain, weakness or a stiff neck can make scanning and steering hard. Teens with attention deficit/hyperactivity disorder or autism have their own guide, linked below.
Who decides: your clinician, the DMV and you
Your clinician gives medical advice. But only the DMV can suspend or withdraw a license, as the 2009 guidelines note [9].
Your own reporting duty: Many license applications ask health questions. In California, telling the DMV you have diabetes can prompt a request for more medical information [8]. Pennsylvania requires a health care provider to complete part of the learner’s permit application [7].
Clinician reporting: The Epilepsy Foundation lists 6 states with mandatory reporting laws, including California and Pennsylvania [4]. Pennsylvania requires physicians and certain other providers to report patients 15 and older within 10 days [7]. Covered conditions include seizure disorders, unstable diabetes, loss of consciousness and corrected vision worse than 20/70 [7]. The state gets more than 27,000 new reports a year. About 22% lead to a license recall [7].
Confidentiality: Pennsylvania keeps these reports confidential and won’t reveal who sent one, even to the patient. It notes that the federal privacy law HIPAA does not block reports that state law requires [7].
Medical review: In California, a review can end in no action, medical probation, suspension or revocation [8]. Probation can limit driving times or places [8]. Pennsylvania’s medical advisory board advises the state on medical and vision standards [7].
When to see a driver rehabilitation specialist
A Certified Driver Rehabilitation Specialist (CDRS) tests driving ability directly. A full evaluation usually pairs an office check of vision, movement and thinking skills with a drive in traffic [15]. Results can include training, adaptive equipment, restrictions or a plan for other transportation [15]. CHOP recommends these specialists for teens with seizures, vision issues, attention concerns or medicine side effects [1].
Consider one if a condition affects strength or reach, or if an instructor doubts your attention or judgment. Find providers through the Association for Driver Rehabilitation Specialists at aded.net.
Your medical conversation before the permit
Book a visit 2 to 3 months before the permit test. Tell the office it is about driving.
Condition guide: what to ask your clinician
Comparison compiled by Safety Behind the Wheel Foundation
| Condition | How it can affect driving | Questions to ask your clinician |
|---|---|---|
| Vision problems | Missed hazards at the sides; trouble with glare, night or low contrast | Do I meet my state’s standard? Do I need lenses or night limits? |
| Epilepsy or seizures | Sudden loss of awareness or control | How long must I be seizure free in my state? Does any exception fit my seizure type? |
| Narcolepsy | Sudden sleep episodes; cataplexy | Is treatment controlling my sleepiness well enough to drive? |
| Sleep apnea or short sleep | Drowsiness, slow reactions, poor attention | Should I have a sleep study? How will we know treatment works? |
| Diabetes on insulin | Lows causing confusion or passing out | What is my “OK to drive” number? What do I do after a severe low? |
| Fainting | Sudden loss of consciousness | Is this the harmless type? Do I need heart testing first? |
| Heart rhythm problems or heart defects | Fainting; driving pauses after devices; attention or coordination challenges | When can I drive after a new device or procedure? |
| Concussion | Slowed thinking, dizziness, vision problems | When is driving safe? Should I restart with supervised drives? |
| Depression, anxiety or bipolar disorder | Fatigue or trouble focusing; medicine side effects | Could my symptoms or medicines affect driving? Which warning signs should we watch? |
| Medicines that cause drowsiness | Slow reactions, blurred vision, dizziness | Can we change the dose or timing? Is it safe to drive the next morning? |
| Hearing loss | Missed sirens, horns and warning tones | Which hearing devices or vehicle alerts would help? |
Frequently asked questions
Can you get a driver’s license with epilepsy?
In most states, yes, once you have been seizure free for the required period [4]. NHTSA reports these periods range from 3 to 18 months, often with exceptions [3].
Can teens with type 1 diabetes drive?
Yes. The ADA says a diabetes diagnosis alone does not show whether someone can drive safely [2]. Check before every drive, and pull over to check if you feel low [2].
Do I have to tell the DMV about a medical condition?
Often, yes. Many applications ask health questions. False answers can cause legal problems after a crash [4]. Check your state’s form.
Will my doctor report me to the DMV?
It depends on your state. A few states require clinicians to report conditions such as seizures [4]. Ask early in the visit so you can talk openly.
Can you drive with narcolepsy?
Often, once treatment controls the sleepiness. The 2009 federal state guidelines advise against driving unless treatment succeeds [9].
The bottom line
Recommendation from Safety Behind the Wheel Foundation
Start the medical conversation before the permit, not after a scare. Know your warning signs and your state’s rules. Agree on a clear “don’t drive today” plan. Good control and honest reporting give you the best chance to learn safely.
Related articles
- ADHD, autism and learning to drive: a parent’s readiness guide
- Drowsy driving: warning signs, hidden risks and what really works
- Drug and medication impaired driving: know your risk before you drive
- Returning to driving after brain injury or surgery: are you really ready?
- Graduated driver licensing: a parent’s roadmap from permit to full license
Sources and further reading
- 1Children’s Hospital of Philadelphia (CHOP). Driving With a Medical Condition (Teen Driver Source) and linked fact sheets Epilepsy and Driving (May 2024), Congenital Heart Disease and Driving (2023) and Hearing Loss and Driving (2026); CHOP Center for Injury Research and Prevention, Medical Conditions and Driving (research summary); and CHOP news release Youths With Mood Disorders 30 Percent Less Likely to Acquire Driver’s License Than Peers (on Gaw CE, et al., JAMA Network Open, April 8, 2024). Accessed October 2026. teendriversource.research.chop.edu; epilepsy fact sheet; heart disease fact sheet; hearing loss fact sheet; research summary; mood disorders news release
- 2American Diabetes Association (ADA). Cox DJ, Frier BM, Bruggeman B, et al. Diabetes and Driving: A Statement of the American Diabetes Association. Diabetes Care 47(11):1889 to 1896. Published online October 21, 2024; and ADA, Driver’s License Information (consumer page), accessed October 2026. doi.org/10.2337/dci24-0068; diabetes.org/tools-resources/drivers-license-information
- 3National Highway Traffic Safety Administration (NHTSA). Driving-Related Fact Sheets for Medical Professionals: Seizures (DOT HS 812 888g), Sleep Disorders (812 888c), Visual Impairment (812 888f) and Cardiovascular Disease (812 888b), July 2023; and risky-driving pages Drowsy Driving (reporting 2024 data) and Drug-Impaired Driving, accessed October 2026. seizures; sleep disorders; visual impairment; cardiovascular disease; nhtsa.gov drowsy driving; nhtsa.gov drug-impaired driving
- 4Epilepsy Foundation. Driving and Transportation and State Driving Laws Database (state entries reflect data as of August 2020). Accessed October 2026. epilepsy.com/lifestyle/driving-and-transportation; epilepsy.com driving laws database
- 5American Academy of Sleep Medicine (AASM). Teen Sleep Duration health advisory (updated April 3, 2016) and Drowsy Driving health advisory (October 18, 2014). aasm.org teen sleep duration; aasm.org drowsy driving
- 6National Institutes of Health (NIH). National Institute of Neurological Disorders and Stroke, Narcolepsy (updated August 25, 2026); National Heart, Lung, and Blood Institute, Sleep Apnea pages on symptoms and on causes and risk factors (updated January 9, 2025); and National Institute of Diabetes and Digestive and Kidney Diseases, Low Blood Glucose (Hypoglycemia) (last reviewed July 2021). ninds.nih.gov narcolepsy; nhlbi.nih.gov sleep apnea symptoms; causes; niddk.nih.gov hypoglycemia
- 7Pennsylvania Department of Transportation (PennDOT). Get a Learner’s Permit; Medical Reporting pages (Mandatory Reporting, Confidentiality, Medical Advisory Board, Medical Reporting FAQs); and License Types and Restrictions. Accessed October 2026. learner’s permit; mandatory reporting; confidentiality; medical advisory board; FAQs; restriction codes
- 8California Department of Motor Vehicles. Medical Conditions and Driving (modified March 18, 2026), Vision Conditions, Lapse of Consciousness Disorders (modified August 7, 2026), Diabetes and Driving (modified August 7, 2026) and Evaluation Guidelines (modified May 16, 2023). medical conditions; vision; lapse of consciousness; diabetes; evaluation guidelines
- 9American Association of Motor Vehicle Administrators (AAMVA) and NHTSA. Driver Fitness Medical Guidelines. September 2009. nhtsa.gov/sites/nhtsa.gov/files/811210.pdf
- 10U.S. Department of Veterans Affairs (VA), Nutrition and Food Services. Low Blood Glucose and Driving (patient handout). March 2020. nutrition.va.gov
- 11American Heart Association (AHA). Syncope (Fainting). Last reviewed October 21, 2024. heart.org syncope
- 12U.S. Food and Drug Administration (FDA). Some Medicines and Driving Don’t Mix. Content current as of March 12, 2024. fda.gov/consumers/consumer-updates
- 13Centers for Disease Control and Prevention (CDC). HEADS UP: Signs and Symptoms of Concussion. September 15, 2025. cdc.gov/heads-up/signs-symptoms
- 14University of Georgia. Concussion May Affect Driving After Symptoms Disappear (February 20, 2017) and $1.8 Million Grant to Improve Post-Concussion Driving Safety (College of Education, February 20, 2024). news.uga.edu; coe.uga.edu
- 15Association for Driver Rehabilitation Specialists (ADED). Best Practice Guidelines for the Delivery of Driver Rehabilitation Services. 2016. cdn.ymaws.com/www.aded.net
This article reflects the safety priorities of traffic medicine and driver rehabilitation. It is general education, not medical or legal advice for any individual. Talk with your own clinician about your health. Check current rules with your state licensing agency, because laws, guidelines and data change. Reviewed October 2026.
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