Risks and Complications of Seizures

The Dangers Associated With Seizures in Epilepsy

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What Are Seizures?

Seizures are sudden, uncontrollable electrical disturbances in the brain. When pathways of communication between neurons (nerve cells) in the brain are disrupted, the opportunity for seizures arises.

Seizures can cause changes in:

  • Behavior
  • Mood
  • Movements
  • Level of consciousness

There are different classifications of seizures which vary in severity, symptoms, duration, and place of origin in the brain. A typical seizure will last from 30 seconds to two minutes. A prolonged, uncontrollable seizure may indicate a greater health risk.

From case to case, symptoms of seizures vary. Some symptoms include:

  • Temporary confusion
  • Uncontrollable jerking movements of the legs and arms
  • Loss of consciousness or awareness
  • Cognitive changes
  • Emotional symptoms, like fear or anxiety

Often times, the cause of seizures are unknown. Seizures may arise during serious health complications, like strokes or infections, such as meningoencephalitis. They may also be triggered by alcohol intake, sleep deprivation, flashing lights, stress, weather changes, and certain odors.  

Status Epilepticus: When Seizures Don’t Stop

Prolonged seizures, lasting over five minutes, generally do not have any lasting effect on a person. For example, febrile seizures, caused by high fevers in children and infants, can last 10 to 15 minutes and do not result in any lasting effect.

On the other hand, status epilepticus is a form of prolonged seizures that are significantly associated with disease (morbidity) and deaths (mortality).

Possible Triggers of Status Epilepticus
Verywell / Emily Roberts

Status epilepticus is characterized as two or more continuous seizures without full recovery of consciousness between them. This condition can last over 30 minutes and is considered a medical emergency.

About 150,000 cases of status epilepticus occur annually in the U.S., with 55,000 associated deaths. Status epilepticus tends to be most frequent in men, the elderly, and the African-American/black population.

Additionally, more than half of reported incidents occur in patients without a history of prior seizures, but close to a quarter of people with status epilepticus have pre-existing epilepsy.

A prolonged episode of status epilepticus can result in a variety of conditions, including:

  • Permanent brain damage
  • Aspiration into the lungs
  • Hyperthermia (elevated body temperature)
  • Abnormal heart rhythms

Identifying and treating a status epilepticus episode immediately is very important, although it may be initially difficult to recognize. In most cases, the standard of care is to treat patients who have generalized seizures for five minutes or longer as if they may be having status epilepticus.

A more serious case of status epilepticus is refractory status epilepticus (RSE). This occurs when the seizures last longer than 60 minutes despite treatment with a standard anticonvulsant. RSE is common among elderly patients and leads to death in approximately 76% of reported cases.

Alcohol or Drug Withdrawal

Withdrawal from alcohol or sedating drugs can take a toll on a person’s body and can cause a variety of related health problems. It is common for a person to have withdrawal seizures, also known as “rum fits,” during the abrupt end of alcohol intake after a long period of heavy drinking.

About one-third of patients undergoing alcohol withdrawal may experience withdrawal seizures. Grand mal seizures are very common during this withdrawal and can be accompanied by:

  • Blackouts
  • Tremors
  • Muscular rigidity
  • Delirium tremens (rapid onset confusion)

Seizures during alcohol or drug withdrawal are generally self-limited, although they can be very serious, and have even been associated with status epilepticus.

Sudden Unexpected Death in Epilepsy (SUDEP)

Sudden unexpected death in epilepsy (SUDEP) occurs about 1 in every 1,000 people dealing with epilepsy. It is a significant, leading cause of death for people with epilepsy, and most commonly occurs in people with poorly controlled epilepsy.

SUDEP is diagnosed after a complete autopsy and toxicology report. When the cause of death of a person with epilepsy cannot be identified, it is considered an SUDEP.

In the few reported witnessed cases, SUDEP follows episodes of general tonic-clonic seizures, also known as grand mal seizures, during which the whole body experiences muscle contractions and the person loses consciousness. Unfortunately, in most cases, SUDEP occurs unwitnessed.

Grand mal seizures and nocturnal (nighttime) seizures are clinical risk factors often associated with SUDEP.

SUDEP also happens to be common among those with an early age of epilepsy onset, men, and those who have a long duration of epilepsy. Pregnant women with epilepsy are also at risk for SUDEP.

If you or someone you know is dealing with epilepsy, gaining the right education and counseling to avoid seizure-provoking factors, like alcohol or sleep deprivation, is important. It may also be beneficial to begin documenting nocturnal seizures.

The lack of supervision during the night can become a risk and delay potential resuscitation. Discussing with your doctor about how to manage nocturnal seizures and prevent seizure clusters may help lower the risk of SUDEP. 

Risks Associated with Seizures

Having uncontrollable seizure may put you at risk for injuries. People with epilepsy, by definition having two or more unprovoked seizures, are at greater risk for a seizure-related injury. They also tend to have higher incidences of accidents outside of a seizure.

Those with seizures that result in an alteration or loss of consciousness, like during atonic seizures or grand mal seizures, are at the highest risk of injury. Notably, most risks are not fatal. The type of injuries associated with seizures depends on the type of seizure and severity.

Broken Bones

Fractures are the most common injury in people with epilepsy. Fractures can occur due to the inability to activate protective reflexes during seizures, resulting in falls.

The muscle contractions of seizures themselves can also pose a great load on the skeleton. Additionally, some anti-epileptic medications are known to reduce bone mass density.


Incidences of burns are more common among people dealing with epilepsy than the greater population. Most reported burns happen during daily activities like cooking or ironing.

Shoulder Dislocations

Posterior shoulder dislocations are described as seizure-related injuries but are fairly rare events. In the case of someone who is experiencing a seizure, ensuring that the person is not lying on their side during the episode may lower the risk of a shoulder dislocation. After the seizure, the person can be turned to their side to help avoid aspiration.

Car Accidents

Driving is often a common concern for those dealing with epilepsy due to the possibility of unprovoked seizures occuring while the individual is behind the wheel. However, fatal crash rates are 2.6 times greater in the general population than among those dealing with epilepsy.

It is important to recognize that the likelihood of an accident occurring while driving does increase if you are dealing with a seizure disorder. Legislation regarding licensing people dealing with epilepsy varies from state to state and country to country. In the U.S., it is required that a person be seizure-free for three to 12 months before being permitted to drive.


Aspiration is defined as the drawing in (or out) of a substance by suction. When food, liquid, or other material enters the lungs or airways by accident, aspiration is occurring.

Aspiration is normal and even happens often in healthy individuals during sleep. The body’s reflexes usually keep the substances out.

Activating these reflexes during and after a seizure is difficult. People dealing with seizures are at a greater risk for aspiration. In some cases, aspiration can lead to respiratory disease and clinical consequences.

During the middle of a seizure, or during the ictal phase, there is a low risk of aspiration. After a seizure is when the risk of oral secretions entering the airways by accident increases.

It is recommended that a person be turned to their side after a seizure in order to avoid aspiration.

It is also better to turn the person to their side after the seizure has ended in order to prevent shoulder dislocation.

Aspiration can eventually lead to aspiration pneumonia, which is characterized by the failure of normal body mechanisms to keep food and liquid out of the lungs, resulting in inflammation, infection, or obstruction of the airway.

Pleuropneumonia Syndrome

It is common that in cases where people have seizures, loss of consciousness, or altered mental status, a condition called anaerobic pleuropneumonia syndrome is more likely to occur. This is characterized by a cough that produces foul-smelling pus-like sputum (a mixture of saliva and mucus).

There can be cavitary pneumonia (when normal lung architecture is replaced with a cavity) and an empyema (a collection of pus in the thin fluid-filled space between the two pulmonary pleura of each lung). If untreated, bacteria can enter the bloodstream and spread the infection to other organs, which may lead to organ failure and death.

Treatment for Persistent Seizures

In the case that potentially dangerous, persistent seizures arise, emergency evaluation is necessary. Contact your local emergency service via telephone and summon an ambulance.

It is important to ensure that vital functions, especially normal breathing and heart function, are preserved. If someone is experiencing persistent seizures, providing respiratory support and monitoring their airway is most important. After the seizure, you can turn the person to their side to avoid aspiration.

Medical help should be sought during or immediately after a dangerous episode of persistent seizures.

During the seizure, blood sugar levels would have decreased drastically, and temperature, the electrical activity of the heart (ECG), and blood pressure must be monitored in order to minimize the risk of another seizure.

In an emergency, a benzodiazepine medication can be administered rectally for fast-acting effects. Ativan, a common medication for controlling seizures, can also be prescribed as an oral or intravenous form of therapy.

A Word From Verywell

Generally, seizures do not typically pose a great risk to an individual dealing with them. There are several warning signs to indicate when a seizure might be potentially dangerous, resulting in severe health consequences and even death. If you or someone you know might be at risk of status epilepticus, SUDEP, or other injuries associated with seizures, talk to your health care provider to learn more about how you can reduce these potential risks.

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