Second Opinions and Re-evaluating an Epilepsy Diagnosis
Why a diagnosis can change — and when it is reasonable to ask for another specialist review
An epilepsy diagnosis can affect:
treatment
medication
driving
employment
pregnancy planning
independence
safety advice
and how future symptoms are interpreted.
It is therefore important that the diagnosis is as accurate as possible.
Sometimes the diagnosis is straightforward.
At other times, it takes:
several witnessed events
video footage
repeated EEGs
MRI
prolonged video telemetry
or specialist review
before the picture becomes clear.
Changing or questioning an epilepsy diagnosis does not automatically mean that somebody made a mistake.
Neurology often involves making the best clinical judgement from the evidence available at that particular time.
When better evidence becomes available, the diagnosis may legitimately change.
NICE specifically says clinicians should review the diagnosis of epilepsy if seizures continue despite an optimal dose of a first-line antiseizure medicine.
Why can epilepsy be difficult to diagnose?
There is no single test that can answer:
“Yes, this person definitely has epilepsy.”
Diagnosis depends heavily on:
the person's description
eyewitness accounts
video where available
circumstances surrounding the event
examination
ECG
EEG
MRI
and other investigations.
Several other conditions can resemble epileptic seizures.
These include:
syncope or fainting
cardiac rhythm disturbances
functional seizures
migraine
sleep disorders
movement disorders
panic attacks
metabolic disturbances
and other neurological conditions.
Epilepsy Action notes that epilepsy can be misdiagnosed partly because there is no single definitive test and because symptoms or test results can sometimes be misunderstood.
A diagnosis is a conclusion from evidence
It can be helpful to think of diagnosis as a working explanation.
A specialist might initially conclude:
“These episodes are probably focal epileptic seizures.”
Later, prolonged video EEG might show that:
some events are epileptic;
some are functional;
or the habitual event has no evidence supporting epilepsy and fits another diagnosis better.
Alternatively, an initially uncertain diagnosis may become more strongly confirmed when telemetry records a characteristic seizure.
Re-evaluation works in both directions.
It can:
remove an incorrect epilepsy diagnosis
strengthen a correct one
identify a different epilepsy syndrome
or show that several conditions are present at the same time.
A changing diagnosis does not necessarily mean the first doctor was careless
Early events are often difficult to interpret.
Imagine someone:
suddenly collapses
becomes stiff
has jerking movements
does not remember the event
and is confused afterwards.
Epilepsy may reasonably be suspected.
But later evidence might reveal an unusual form of syncope.
Or the opposite can happen.
Someone initially thought to be fainting may later have video EEG evidence of focal epilepsy.
Epilepsy Action specifically notes that functional seizures may initially be diagnosed as epilepsy, and that this does not necessarily mean previous doctors provided poor care—the diagnosis may become clearer as more events are observed.
When should an epilepsy diagnosis be reviewed?
There is no single rule, but review becomes particularly important when the clinical picture does not behave as expected.
Reasons may include:
seizures continuing despite appropriate treatment
several medicines having little or no effect
events changing significantly
several very different event types occurring
EEG and symptoms not fitting together
MRI findings not fitting the presumed epilepsy
an unusual recovery pattern
uncertainty about whether events are epileptic
or new evidence becoming available.
One particularly important NICE recommendation is:
review the epilepsy diagnosis when seizures continue despite an optimal dose of a first-line antiseizure medicine.
That does not mean one unsuccessful medicine proves the diagnosis is wrong.
It means the diagnosis deserves checking before treatment simply escalates indefinitely.
Why reconsider the diagnosis after treatment fails?
There are several possibilities.
The person may genuinely have epilepsy and simply need a different treatment.
But persistent events could also mean:
the seizure type was classified incorrectly
the wrong epilepsy syndrome was identified
the medicine was inappropriate for that seizure type
some events are epileptic and others are not
or the original diagnosis needs reconsidering.
This matters because some antiseizure medicines can actually worsen particular seizure types.
Correct classification is therefore part of effective treatment.
Related Information Hub page:
Focal, Generalised, Unknown and Unclassified Seizures — Understanding the 2025 ILAE Classification
Uncontrolled events do not automatically mean drug-resistant epilepsy
Before concluding that somebody has drug-resistant epilepsy, clinicians should be confident that the events being treated really are epileptic seizures.
Otherwise, somebody could:
try medicine after medicine
develop side effects
still experience attacks
and eventually be labelled drug resistant
when the medicines were never treating the correct condition.
Epilepsy Action specifically advises reconsidering whether events have been correctly diagnosed when epilepsy medicine repeatedly does not work.
Related Information Hub page:
Drug-Resistant Epilepsy: What It Actually Means
The seizure description may need to be rebuilt from the beginning
During re-evaluation, a specialist may ask very basic questions again.
For example:
Before the event
What was the person doing?
Standing?
Sitting?
Sleeping?
Exercising?
In pain?
Emotionally distressed?
Had they just stood up?
Were they dehydrated?
Was there déjà vu?
A strange smell?
Visual change?
Nausea?
Sweating?
Palpitations?
During the event
What happened first?
Did the head turn?
Were the eyes open?
Was one side involved first?
Was there stiffening?
How long did jerking continue?
Could the person respond?
Were movements rhythmic?
Was there repetitive behaviour?
What happened to skin colour?
Afterwards
Was there confusion?
Sleep?
Headache?
Weakness?
Memory loss?
Immediate normal recovery?
How long did recovery take?
Repeating these questions is not necessarily pointless repetition.
A specialist may be testing an entirely different diagnostic hypothesis.
Eyewitnesses can change the diagnosis
The person having an event may not remember:
the beginning
the middle
or sometimes any of it.
A witness may notice something extremely important.
For example:
“Her head always turns sharply to the right before she falls.”
or:
“He goes pale, sweats and says he feels faint before collapsing.”
These details can lead clinicians in very different directions.
NICE uses features such as:
head turning
unusual posturing
prolonged jerking
post-event confusion
déjà vu or jamais vu
as clues supporting an epileptic seizure, while features such as sweating, prolonged standing, pallor or symptoms relieved by lying down may point towards fainting.
Video can be one of the most useful pieces of new evidence
A safely recorded phone video can sometimes provide information that years of verbal descriptions did not.
It may show:
how the event begins
whether movement is symmetrical
responsiveness
eye position
breathing
automatisms
duration
and recovery.
Epilepsy Action recommends video where it can be obtained safely because it can help clinicians distinguish epileptic seizures from functional and other seizure-like events.
Safety always comes first.
Do not delay:
first aid
emergency help
or protection from injury
for the sake of filming.
A normal EEG does not mean the original diagnosis was wrong
This is one of the most important misconceptions.
NICE explicitly says:
EEG should not be used to exclude epilepsy.
A routine EEG is only a short sample of brain activity.
Someone with genuine epilepsy can have:
one normal EEG
several normal EEGs
or no epileptiform abnormalities during a routine recording.
So:
normal EEG ≠ no epilepsy.
A diagnosis should not be withdrawn simply because one routine EEG is normal.
But an abnormal EEG does not settle everything either
EEG findings must fit the clinical events.
An EEG may show:
epileptiform abnormalities
slowing
normal variants
artefact
or findings whose significance depends on the clinical context.
If the person's habitual event does not resemble an epileptic seizure, one EEG abnormality should not automatically be used to explain every symptom.
The EEG is one part of the diagnosis.
Related Information Hub page:
EEG: What It Can — and Cannot — Tell You About Epilepsy
MRI can also be reviewed again
NICE recommends specialist review of MRI when:
seizures continue despite treatment
and the diagnosis remains unclear.
It also recommends considering another MRI when:
the original scan was suboptimal
new epilepsy features have appeared
certain presumed non-structural epilepsies fail first-line treatment
or surgery is being considered.
Sometimes the issue is not that the first MRI was technically “wrong”.
A specialist epilepsy neuroradiologist may simply be looking for abnormalities that are:
extremely subtle
relevant to a particular seizure pattern
or easier to recognise once EEG and clinical localisation are known.
A normal MRI does not disprove epilepsy either
Many people have epilepsy with no identifiable structural abnormality on conventional MRI.
So:
normal MRI + normal EEG
still does not automatically mean:
“You do not have epilepsy.”
The diagnosis remains clinical.
However, if the entire story has become uncertain, normal investigations may form part of the wider re-evaluation.
Related Information Hub page:
MRI and Epilepsy: What Doctors Are Looking For
Video telemetry can be particularly important
When diagnostic uncertainty persists, prolonged video EEG telemetry can be very useful.
It records:
the person's behaviour
and EEG activity
simultaneously.
The ideal result is to capture the person's typical event.
Doctors can then ask:
What was the person doing while the EEG was changing?
or:
Did the habitual event occur without an epileptic EEG pattern?
This can substantially strengthen or change a diagnosis.
One captured event does not always explain every event
Suppose someone describes two attack types:
Event A
Brief staring with repetitive hand movements.
Event B
Long episodes of shaking lasting many minutes.
Video telemetry captures only Event B.
That recording may diagnose Event B.
It does not automatically prove that Event A has the same cause.
If people experience several clearly different attack types, specialists may try to capture examples of each.
Related Information Hub page:
Video Telemetry: Recording Seizures in Hospital
Functional seizures
Functional seizures can look extremely similar to epileptic seizures.
They may involve:
shaking
collapse
reduced responsiveness
abnormal movements
or apparent loss of consciousness.
They are real, involuntary events.
But they are not caused by the abnormal epileptic electrical activity responsible for epileptic seizures.
Epilepsy Action classifies functional seizures as part of functional neurological disorder — FND.
Functional does not mean fake
This needs to be stated clearly.
A diagnosis of functional seizures does not mean:
the person invented the attacks
they are pretending
they could simply stop them
or nothing neurological is happening.
Functional neurological disorder involves a problem with the way brain networks are functioning rather than the structural or epileptic electrical mechanism responsible for epilepsy.
The attacks are involuntary and can be extremely disabling.
Functional seizures and epilepsy can exist together
This is particularly important during re-evaluation.
The possible conclusions are not simply:
epilepsy
or
functional seizures.
Some people have both.
Epilepsy Action notes that a significant minority of people with functional seizures also have epilepsy.
So discovering that one event is functional does not automatically mean a person's established epilepsy diagnosis must be removed.
Different events need to be evaluated individually.
An example of dual diagnosis
Someone might experience:
Event 1
Brief focal seizures during sleep with corresponding epileptic EEG activity.
and:
Event 2
Long daytime episodes of shaking without an epileptic EEG correlate and with clinical features supporting functional seizures.
Both diagnoses can be true.
Treatment then needs to address both conditions appropriately.
Increasing antiseizure medication to treat functional attacks would not be expected to solve them.
But stopping epilepsy treatment simply because functional seizures were also diagnosed could be dangerous if epileptic seizures continue.
No EEG change does not automatically mean functional seizure
This is another important caution.
Some genuine focal epileptic seizures can produce little or no clearly visible change on scalp EEG.
This is more likely when seizure activity is:
deep
very focal
obscured by movement
or poorly represented at scalp electrodes.
Therefore specialists do not diagnose functional seizures simply because:
“the EEG was normal during the attack.”
They interpret:
the semiology
EEG quality
event pattern
video
other seizures
history
and other investigations together.
Fainting is another major mimic
Syncope can produce more than simply going limp.
People can sometimes:
stiffen
twitch
jerk
make noises
or briefly appear unresponsive.
NICE specifically warns that brief seizure-like activity can occur during uncomplicated faints.
That means:
“They jerked, therefore it definitely was epilepsy”
is not a reliable diagnostic rule.
Why the ECG matters during re-evaluation
Some cardiac rhythm problems can cause sudden loss of consciousness.
That is why NICE recommends a 12-lead ECG after a first suspected seizure.
If episodes remain unexplained, clinicians may reconsider whether further cardiac assessment is appropriate.
This can be particularly important when events involve:
sudden collapse
exertion
palpitations
family history of sudden cardiac death
or very rapid recovery.
Cardiac causes should not be overlooked simply because a person was previously labelled as having epilepsy.
Migraine can also cause unusual neurological symptoms
Migraine aura may produce:
visual disturbance
numbness
tingling
speech problems
confusion
or other neurological symptoms.
Some focal epileptic auras can appear similar.
Timing can provide clues.
For example, typical migraine aura generally evolves over minutes, whereas many focal epileptic auras are:
sudden
brief
recurrent
and highly stereotyped.
But there are exceptions.
Clinical assessment remains important.
Related Information Hub page:
Auras and Epilepsy: The Seizure Before the Seizure?
Sleep disorders can resemble epilepsy
Some events occurring at night can be difficult to classify.
Possibilities include:
nocturnal focal seizures
parasomnias
REM behaviour disorder
sleepwalking
night terrors
sleep-related movement disorders
and other sleep phenomena.
NICE recommends urgent neurological assessment for symptoms suggestive of new-onset epileptic seizures during sleep.
Prolonged video EEG or specialist sleep investigations may sometimes be needed.
Panic and anxiety can resemble focal seizures
Some focal seizures, particularly those involving temporal and limbic networks, can cause:
sudden fear
racing heart
nausea
derealisation
altered perception
or a feeling of impending disaster.
Panic attacks can produce very similar symptoms.
Epilepsy Action specifically warns that anxiety and some epileptic seizure symptoms can be mistaken for one another.
The repeated timing and sequence of symptoms may help.
For example:
abrupt
brief
highly stereotyped episodes
may raise greater suspicion of focal epilepsy.
But difficult cases require specialist assessment.
Medication response cannot diagnose epilepsy by itself
It can be tempting to argue:
“The medication helped, so the attacks must be epilepsy.”
or:
“The medication did not work, so it cannot be epilepsy.”
Neither conclusion is reliable.
Seizures can:
naturally fluctuate
respond partially
recur despite appropriate medication
or improve temporarily for unrelated reasons.
Likewise, some antiseizure medicines affect:
mood
migraine
pain
and other neurological symptoms.
Medication response is useful information but is not a standalone diagnostic test.
What if medication never made any difference?
That is worth discussing.
Possible explanations include:
genuine drug-resistant epilepsy
incorrect seizure classification
inappropriate medicine
inadequate dose
medication not being absorbed or taken consistently
functional seizures
another mimic
or a combination of epilepsy and non-epileptic events.
NICE's recommendation to revisit the diagnosis when first-line treatment fails exists partly for this reason.
Do not stop antiseizure medication suddenly because the diagnosis is being questioned
This is extremely important.
If somebody has been taking an antiseizure medicine regularly, suddenly stopping it can provoke:
breakthrough seizures
seizure clusters
or potentially status epilepticus.
Even if the diagnosis is being reconsidered, medication should normally be changed or withdrawn only according to an agreed clinical plan.
A second opinion is a reason to review treatment safely, not to stop treatment independently.
What is a second opinion?
A second opinion means asking another appropriately qualified clinician to review:
the diagnosis
investigation
treatment
or proposed plan.
The second specialist may:
agree completely
agree with the diagnosis but suggest different treatment
refine the diagnosis
request more tests
or disagree with part or all of the original conclusion.
The purpose is another expert assessment.
It is not a vote in which whichever doctor gives the preferred answer automatically wins.
Can you ask for a second opinion in the NHS?
Yes.
In England, Epilepsy Action advises that there is not an automatic legal entitlement to a second specialist opinion, but a request should be considered.
Possible routes include:
asking the current specialist to arrange review by another neurologist or epilepsy specialist;
or asking the GP for a referral to a different specialist.
Arrangements differ across the UK, so local pathways should be checked.
A second opinion does not automatically transfer ongoing care to the new doctor.
Asking for a second opinion is not accusing your doctor
A request can be framed very simply:
“My events are continuing and I would like another epilepsy specialist to review the diagnosis and treatment.”
That is a reasonable medical request.
Complex epilepsy sometimes benefits from another clinician reviewing:
the original evidence
EEG
MRI
medication history
and event descriptions
with fresh eyes.
When might a second opinion be particularly useful?
Examples include:
diagnosis remains uncertain
seizures continue despite treatment
several epilepsy medicines have failed
different specialists have given different diagnoses
surgery is being considered
surgery has been ruled out and the reason is unclear
MRI and EEG appear contradictory
events have changed
functional seizures have been suggested but the explanation is unclear
there are several distinct event types
or the person does not understand the evidence supporting their diagnosis.
Tertiary epilepsy review may be more useful than simply another general opinion
For complex cases, the most useful second opinion may come from a tertiary epilepsy centre rather than another general neurology clinic.
These services can access:
specialist epileptologists
video EEG telemetry
epilepsy neuroradiology
neuropsychology
genetics
advanced imaging
and epilepsy-surgery assessment.
Related Information Hub page:
Tertiary Epilepsy Centres: What Happens When You're Referred?
Getting another opinion before epilepsy surgery
A decision about epilepsy surgery involves potentially irreversible treatment.
It is reasonable for people to want a clear understanding of:
why surgery is being recommended
where seizures are believed to begin
likely benefits
possible cognitive risks
alternatives
and how confident the team is.
A second specialist or surgical-centre opinion may be particularly valuable if:
evidence is discordant
the proposed operation carries substantial functional risk
or the person remains unsure about the recommendation.
A second opinion still does not guarantee that another team will reach a different conclusion.
A second opinion may confirm the original diagnosis
This can itself be valuable.
For example, somebody may worry that:
“My EEG was normal, so perhaps I never had epilepsy.”
A second epilepsy specialist might review:
witnessed focal seizures
consistent auras
video evidence
treatment history
and the EEG limitations
and conclude that the original diagnosis remains well supported.
Re-evaluation is not only about finding mistakes.
It can increase confidence in a diagnosis.
Access to medical records can help
Having accurate records can make a specialist review easier.
Useful documents may include:
neurology clinic letters
EEG reports
MRI reports
discharge summaries
medication history
emergency-department notes
video-telemetry reports
genetics reports
and neuropsychology results.
In England, many GP and hospital documents can now be viewed through the NHS App where the relevant provider makes them available.
Copies of records held by hospitals can also be requested from the organisation that holds them.
The actual MRI or EEG may matter more than the report
A specialist sometimes needs to see the original:
MRI images
EEG tracing
or video EEG recording
rather than only reading:
“MRI normal”
or:
“EEG abnormal.”
For example, NICE recommends additional specialist neuroradiology review when seizures remain ongoing and the diagnosis remains unclear.
That can reveal subtleties that a brief written summary cannot convey.
Make a list of every different event type
This can be one of the most useful things to do before re-evaluation.
Instead of simply writing:
“I have seizures,”
separate them.
For example:
Type 1
sudden déjà vu
lasts 20 seconds
fully remembered
twice a week
Type 2
becomes unresponsive
rubs hands repeatedly
lasts around 90 seconds
confused afterwards
Type 3
collapses
bilateral stiffening and jerking
prolonged recovery
Type 4
long episodes of shaking while intermittently responsive
Those events may all be part of one epilepsy.
Or they may not be.
Making the differences clear helps the specialist investigate them properly.
Include events you used to dismiss
People sometimes mention only their largest seizures.
Smaller episodes may actually provide the most useful localisation information.
Examples include:
déjà vu
smell or taste sensations
brief blank spells
unexplained memory gaps
nocturnal events
isolated jerks
sudden fear
brief focal movements.
If these are epileptic, they are relevant seizures.
Related Information Hub page:
Auras and Epilepsy: The Seizure Before the Seizure?
Also include events that feel completely different
Do not assume every unusual event is automatically part of an established epilepsy diagnosis.
If one event looks completely different, tell the specialist.
A person can develop:
migraine
syncope
functional seizures
medication side effects
sleep disorders
or another neurological condition
even if they already have confirmed epilepsy.
A previous epilepsy diagnosis should not become a reason to stop investigating new symptoms.
New neurological symptoms deserve assessment
NICE repeatedly emphasises that people with established functional neurological symptoms should still have new neurological signs or symptoms assessed appropriately rather than everything automatically being attributed to the existing diagnosis.
The same clinical principle is useful more broadly:
an existing diagnosis should not become a catch-all explanation for every future symptom.
Why labels can become sticky
Once “epilepsy” appears in medical records, future clinicians may naturally interpret new events through that diagnosis.
This is sometimes called diagnostic anchoring.
The same can happen with a diagnosis of:
functional seizures
migraine
anxiety
syncope
or another condition.
Good medical review asks:
“Does the current evidence still fit this diagnosis?”
rather than assuming an old label must explain everything forever.
Reclassification is different from removing the diagnosis
Sometimes the conclusion remains epilepsy but becomes more precise.
For example:
epilepsy
may become:
focal epilepsy
then:
temporal-lobe epilepsy
and perhaps later:
left temporal-lobe epilepsy associated with hippocampal sclerosis.
That is diagnostic refinement.
Other times a previous seizure label might change from:
generalised tonic-clonic
to:
focal to bilateral tonic-clonic
after an aura or focal EEG onset is recognised.
The condition did not necessarily change.
The description became more accurate.
Why modern terminology can make records look contradictory
Epilepsy terminology changes over time.
A person may see:
simple partial seizure
focal aware seizure
focal preserved consciousness seizure
in records written at different times.
Or:
complex partial seizure
focal impaired-awareness seizure
focal impaired consciousness seizure.
These may describe closely related seizure concepts using terminology from different classification systems.
Related Information Hub page:
Focal, Generalised, Unknown and Unclassified Seizures — Understanding the 2025 ILAE Classification
Questions to ask when reviewing an epilepsy diagnosis
Useful questions include:
What evidence supports my epilepsy diagnosis?
Which of my events do you believe are epileptic?
Could I have more than one type of event?
What seizure type do you think I have?
Is my diagnosis based mainly on history, EEG, MRI or captured seizures?
Has one of my typical seizures ever been recorded on video EEG?
Does my MRI support the diagnosis?
Could fainting or a cardiac condition explain any events?
Could migraine explain some symptoms?
Could functional seizures be occurring as well as epilepsy?
Why did my first medicine fail?
Do you think the original diagnosis needs reconsidering?
Would tertiary epilepsy review help?
Questions if functional seizures are suggested
Useful questions include:
Which event do you think is functional?
Was that exact event recorded?
What features support the diagnosis?
Could some of my other events still be epileptic?
Do I have a dual diagnosis?
What does the EEG show during my typical event?
What treatment is recommended for the functional seizures?
What happens to my antiseizure medication?
Who will continue managing any confirmed epilepsy?
A clear explanation is important.
Simply telling somebody:
“Your EEG is normal, therefore your seizures are functional”
would be an inadequate explanation because scalp EEG has important limitations.
Questions when asking for a second opinion
Useful questions include:
Can another epilepsy specialist review my diagnosis?
Would a tertiary epilepsy centre be more appropriate?
Can the specialist review my original MRI images?
Can my EEG recordings be reviewed rather than only the reports?
Should video telemetry be considered?
Do I need to provide videos of my events?
Can I obtain copies of my previous clinic letters and test results?
Will the second specialist take over my care or provide an advisory opinion?
Preparing for another specialist review
Before the appointment, it can help to prepare:
a concise timeline
seizure diary
list of current medicines
list of previous medicines and reasons they stopped
videos
witness descriptions
copies of major reports where available
family history
and a list of specific questions.
A short chronological timeline can be especially useful.
For example:
2023 — first unexplained collapse
2024 — epilepsy diagnosed
2024 — first medication started
2025 — second event type appeared
2025 — routine EEG normal
2026 — video telemetry captured habitual episodes
This helps a new specialist understand the sequence without relying entirely on memory during the appointment.
Do not try to prove the diagnosis yourself
A seizure diary and videos are useful.
Deliberately trying to trigger an event is not.
Do not intentionally:
miss medication
deprive yourself of sleep
expose yourself to suspected flashing-light triggers
drink heavily
or provoke seizures
to obtain evidence.
Specialist investigations are designed to answer diagnostic questions as safely as possible.
What if the diagnosis changes from epilepsy to something else?
The new diagnosis should be explained clearly.
Questions should include:
Why has the diagnosis changed?
What evidence changed it?
What condition is now believed to explain the events?
Do I still have any epileptic seizures?
What happens to my medication?
Does medication need to be tapered?
What treatment replaces it?
What safety advice still applies?
Does the diagnosis affect driving?
Who will provide follow-up care?
A changed diagnosis should come with a new care plan, not simply removal of the old label.
What if epilepsy is confirmed again?
That is also a useful outcome.
The specialist may then be able to clarify:
seizure type
epilepsy type
cause
syndrome
whether epilepsy is drug resistant
and whether further treatment should include surgery or another specialist option.
Diagnostic certainty can prevent years being spent repeatedly questioning every event.
What if uncertainty remains?
Sometimes even extensive investigation does not produce complete certainty.
A specialist may conclude:
epilepsy is probable
a particular event remains unclear
further observation is needed
or more than one diagnosis remains possible.
Medicine is not always able to produce a definitive answer immediately.
In that situation, a useful plan should explain:
what is known
what remains uncertain
what evidence would change the diagnosis
what treatment is safest meanwhile
and when reassessment should occur.
Uncertainty should be acknowledged rather than disguised.
The most important message
An epilepsy diagnosis is important, but it is not untouchable.
It should be revisited when the evidence no longer fits.
NICE specifically recommends reviewing the diagnosis if seizures continue despite an optimal dose of first-line antiseizure medication.
Re-evaluation may reveal:
correctly diagnosed but uncontrolled epilepsy
an incorrectly classified epilepsy
a different epilepsy syndrome
functional seizures
syncope
migraine
another neurological disorder
or more than one condition occurring together.
Normal EEG or MRI results do not automatically disprove epilepsy.
Likewise, once somebody has been diagnosed with epilepsy, every later event should not automatically be assumed to be epileptic.
A second opinion can be useful when:
the diagnosis remains uncertain
events continue despite treatment
different clinicians disagree
several event types exist
or important treatment decisions such as surgery are being considered.
Asking for another specialist review is not an accusation.
It is a way of asking:
“Does all of the evidence we have now still support the diagnosis we made before?”
Sometimes the answer will be yes.
Sometimes the diagnosis will become more precise.
And occasionally, the answer will change completely.
The goal is not to defend the original label.
The goal is to make sure the person receives treatment for the condition they actually have.
Sources and further reading
NICE — Epilepsies in children, young people and adults (NG217): Principles of treatment.
NICE specifically recommends reviewing the diagnosis of epilepsy when seizures continue despite an optimal dose of a first-line antiseizure medicine. It then recommends trying alternative treatment only if the epilepsy diagnosis remains confirmed.
NICE — Epilepsies in children, young people and adults (NG217): Diagnosis and assessment.
Current guidance states that EEG must not be used to exclude epilepsy, recommends ECG after a first suspected seizure and advises specialist neuroradiology review or repeat MRI in selected circumstances when diagnosis remains unclear or epilepsy changes. Last updated January 2025.
NICE — Transient loss of consciousness in over 16s (CG109).
Provides features that can help clinicians distinguish suspected epileptic seizures from fainting and other causes of transient loss of consciousness.
Epilepsy Action — Diagnosis.
Current UK patient information explains why epilepsy can sometimes be misdiagnosed and advises discussing diagnostic concerns with the specialist or seeking another specialist review where appropriate. Last modified March 2026.
Epilepsy Action — Functional (dissociative) seizures.
Explains that functional seizures are real involuntary events, may be difficult to distinguish from epileptic seizures and can coexist with epilepsy.
Epilepsy Action — Getting the right treatment and care in England.
Explains current second-opinion arrangements, including asking the existing specialist or GP for referral to another specialist and noting that a second opinion does not automatically transfer ongoing care.
NHS — NHS App documents.
Current information on accessing available GP, hospital and specialist documents through the NHS App in England. Reviewed January 2026.
Information reviewed: September 2026.
This page provides general educational information. Do not stop or rapidly reduce antiseizure medication because an epilepsy diagnosis is being reconsidered; medication changes should be made with appropriate medical supervision.
