Motorists could face a £1,000 fine simply for suffering from one of 200 common ailments, from arthritis to high blood pressure
Medical conditions ranging from anorexia and agoraphobia to high blood pressure or kidney problems are among those that drivers are required by law to inform the Driver and Vehicle Licensing Agency (DVLA) about.
But motoring chiefs fear millions of Brits have failed to disclose their conditions, partly because some of them are so obscure.
The more bizarre include cataplexy, in which strong emotion or laughter causes sudden physical collapse, and deja vu, according to leading vehicle leasing firm Select Car Leasing.
The firm’s director Mark Tongue said it was vital drivers were aware of the health conditions they are required to tell the DVLA about by law.
He said: “These conditions have been identified so that the roads are kept as safe as possible.
“But many drivers may be somewhat surprised by how many medical conditions are notifiable and exactly which they are.
“Some are quite obvious, such as alcoholism, brain injury, strokes and various amputations.
“Others are less so and include some cancers, several hearing problems, arthritis and Asperger syndrome.
“I imagine many women would be surprise to know that having a Caesarean is also on the DVLA’s list.
“It comes under the category of surgical procedures, but it does not mean they will be stopped from driving.
“Most of the listed conditions can be taken on the road and driving engaged with perfectly safely.
"But motorists do need to be aware that if they develop a new medical condition they may have to inform the DVLA."
Those who fail to disclose their condition face a £1,000 fine, may have their motoring insurance invalidated, and could be prosecuted if involved in a crash.
The list of notifiable conditions includes many that are less of a surprise, including muscle-wasting illness multiple sclerosis and brain haemorrhages.
Bipolar disorder, sleeping disorder narcolepsy, Syncope – a temporary loss of consciousness – and Parkinson’s disease, caused by degeneration of the nervous system, are included.
The list also extends to motor neurone disease, vertigo, tunnel vision, night blindness, seizures and depression.
People wishing to contact the DVLA about a medical condition can do so online or by post.
They will then be notified by the government’s driving authority of which restrictions, if any, they must abide by.
The DVLA can impose a restriction on driving of up to three years, with a re-examination then being required.
Amyotrophic Lateral Sclerosis
Arachnoid cyst Arrhythmia
Attention deficit hyperactivity disorder (ADHD)
Autistic spectrum condition (ASC)
Balloon angioplasty (leg)
Brachial plexus injury
Brain abscess, cyst or encephalitis
Brain injury (traumatic)
Branch retinal vein occlusion
Broken limbs and driving
Burr hole surgery
Carotid artery stenosis
Central venous thrombosis
Chronic aortic dissection
Congenital heart disease
Coronary artery bypass or disease
Diplopia (double vision)
Grand mal seizures
Heart valve disease or replacement valve
High blood pressure
Hypoxic brain damage
Implantable cardioverter defibrillator (ICD)
Ischaemic heart disease
Left bundle branch block
Lewy body dementia
Long QT syndrome
Low blood sugar
Malignant brain tumours
Manic depressive psychosis
Memory problems (severe)
Motor neurone disease
Obsessive compulsive disorder
Obstructive sleep apnoea
Peripheral arterial disease
Petit mal seizures
Post traumatic stress disorder (PTSD)
Severe communication disorders
Sight in one eye only
Spinal problems and injuries and driving
Temporal lobe epilepsy
Tonic clonic fits
Transient global amnesia
Transient ischaemic attack (TIA)
Valve disease or replacement valve
Vision in one eye only
Visual acuity (reduced)
Visual field defects