Quick answer: most medical conditions do not automatically stop you driving an HGV. The DVLA assesses each case against its Group 2 standards: some conditions need evidence of control, some carry a waiting period, and only a few are outright bars. Declaring honestly matters more than the condition itself.
“Will my condition cost me my licence?” is the question drivers most often bring to a medical. The honest answer is that the DVLA refuses far fewer drivers than people fear, but it does hold lorry and bus drivers to a stricter standard than car drivers. Here is how the common conditions are actually treated.
Blood pressure
The Group 2 line is a resting blood pressure consistently at or above 180 systolic or 100 diastolic: at that level you cannot drive HGVs until it is brought under control. Below it, treated and well-managed hypertension passes. If a high reading is first discovered at your medical, your GP can usually get it controlled within weeks and you can be re-examined.
Heart conditions
A heart attack, heart surgery or a significant arrhythmia does not end an HGV career, but it pauses it. The DVLA typically requires a recovery period and then evidence, commonly including an exercise or functional test, before restoring Group 2 entitlement. Your cardiologist’s reports do most of the work here; the medical records what treatment you have had and how stable you are now.
Diabetes
Diet and tablet-controlled diabetes is generally compatible with HGV driving, subject to regular review. Insulin-treated diabetes has had a route to Group 2 licensing since 2012: broadly, you need regular blood glucose monitoring including around driving, full awareness of hypoglycaemia, no severe hypo in the last twelve months, and an annual specialist review. It means more paperwork, not a closed door.
Epilepsy and seizures
This is where Group 2 rules are strictest. Established epilepsy generally requires ten years seizure-free without anti-epilepsy medication before HGV entitlement returns. A single, one-off unprovoked seizure with normal investigations usually means around five years away from Group 2 driving. If this affects you, speak to the DVLA before spending money on training or medicals.
Sleep apnoea
Untreated obstructive sleep apnoea with excessive daytime sleepiness means stopping until it is treated. The flip side: diagnosed drivers using CPAP with good compliance routinely keep their licences, with periodic review. Bring evidence of your treatment and compliance to the medical and this becomes a routine item, not a problem.
Mental health and antidepressants
Taking an antidepressant is not a fail and never has been. The doctor records whether your condition is stable, whether the medication affects alertness, and whether there have been recent crises. Long-stable treatment is compatible with professional driving.
Alcohol and drugs
Dependency and persistent misuse lead to refusal or revocation until you can show a sustained period free of the problem, and the period is longer for Group 2 than for car licences. One thing to be direct about: the medical includes questions on this, and honesty protects you. Undeclared conditions discovered later can mean prosecution as well as licence loss.
Eyesight
Group 2 has a higher visual standard than car driving, covering acuity in both eyes and field of vision, with glasses and contacts allowed within limits. The full standards are covered in our HGV medical test guide.
How the process actually works
The examining doctor records your conditions on the DVLA’s D4 form; the DVLA then decides. Outcomes range from a normal licence, to a licence with a shorter review period, to a request for specialist reports. Most declared, managed conditions end in a licence. If you want the examination done quickly and properly, our GMC-registered doctors complete the full medical for £49.99 at more than 80 clinics across England: book an appointment.
Condition FAQs
What medical conditions stop you from driving an HGV?
Very few outright: uncorrectable vision below the standard, epilepsy within the waiting periods, unstable insulin-treated diabetes, and untreated conditions that cause sudden incapacity. Almost everything else is assessed on control and stability.
Can I drive an HGV with high blood pressure?
Yes, if it is controlled below 180/100. Uncontrolled readings at that level pause your entitlement until treatment works.
Can I drive an HGV after a heart attack?
Usually yes, after the DVLA’s recovery period and satisfactory test results. Many professional drivers return to work following cardiac events.
Do I have to declare a condition if it is well controlled?
Yes. The D4 asks, and non-disclosure risks prosecution and invalidated insurance. Declared, controlled conditions rarely block a licence.