Should I give Levitracetam in this TBI?

Good posts start with good questions. Have an ER question? Send it here.

KEY

🔍- Deep Dive

📌- Clinical Application

🔸 - Weak Evidence

🔹 - Strong Evidence

📑 - Evidence summaries

✅ - Recommended treatment

⚠️ - Critical Information

The CT is done and you see an intracranial bleed.

And almost automatically, you write:

Inj. Levetiracetam 1 g IV stat

But pause for a second.

Is that always the correct thing to do?

Let’s unpack this question.

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Jump to what matters ⏬

Firstly, what are you trying to prevent?

The short answer: Post-traumatic seizures (PTS).

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But what exactly does that mean?

As the name suggests, post-traumatic seizures are seizures that occur after head trauma and are believed to be causally related to the injury itself 1.

PTS are broadly classified based on timing.

Immediate seizures (<24 hours)

These occur within minutes or hours after injury.

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A distinct subset occurs within seconds of impact, sometimes referred to as “concussive convulsions”.

Whether these events represent true epileptic seizures is debated. Some researchers consider them benign convulsive phenomena associated with concussion 2 while others include them in the category of early post-traumatic seizures because they may carry a similar risk of later epilepsy.

Early seizures (<7 days)

These occur within the first week after injury and are generally considered provoked seizures, resulting from acute brain injury.

Late seizures (>7 days)

Seizures occurring beyond the first week are considered unprovoked and usually represent post-traumatic epilepsy (PTE) 1.

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This distinction matters clinically.

Early seizures are acute symptomatic events with a relatively low risk of recurrence.

Late seizures represent epilepsy, a more permanent structural and physiological changes in the brain.

However, patients who experience early seizures do have a higher risk of developing post-traumatic epilepsy compared with those who do not 3.

But why do we care?

Post-traumatic seizures (PTS) are not rare after traumatic brain injury. In patients with severe blunt TBI, seizures occur in roughly 15% of cases.

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They are typically distributed as:

Immediate seizures (<24 hours): 1–4%

Early seizures (<7 days): 4–25%

Late seizures (>7 days): 9–42%

The concern is that seizures can contribute to secondary brain injury.

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Seizure activity increases:

cerebral metabolic demand

excitatory neurotransmitter release

intracranial pressure

Beyond the acute phase, post-traumatic seizures can also have long-term consequences, including:

cognitive impairment

behavioural changes

reduced functional outcomes

negative effects on employment and quality of life

In that sense, seizure-related neurotoxicity represents a potentially preventable source of morbidity.

However, the story is more nuanced. It is crucial to remember that :

Antiepileptic medications are not risk-free, and routine prophylaxis must be balanced against potential adverse effects.

More importantly, evidence suggests that reducing early post-traumatic seizures does not improve long-term mortality 4.

Preventing early seizures does not prevent post-traumatic epilepsy 5.

Antiseizure medications used in TBI only reduce early seizures (within the first 7 days) 5.

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So while seizure prophylaxis can reduce early seizures, its impact on long-term outcomes remains limited, making careful patient selection essential.

Who is at risk?

Before discussing seizure risk, it helps to recall how traumatic brain injury (TBI) severity is classified.

According to ATLS (11th edition):

Severe TBI: GCS ≤8

Moderate TBI: GCS 9–12

Mild TBI: GCS 13–15

The risk of post-traumatic seizures increases with increasing severity of brain injury.

Among all mechanisms, the highest seizure incidence occurs in penetrating traumatic brain injury.

Risk factors for early post-traumatic seizures

Glasgow Coma Scale ≤10

Immediate seizure after injury

Cortical contusion

Depressed skull fracture

Penetrating head injury

Subdural hematoma

Epidural hematoma

Intracerebral hematoma

Post-traumatic amnesia >30 minutes

Chronic alcoholism

Risk factors for late seizures (post-traumatic epilepsy)

Early post-traumatic seizures

Intracerebral hematoma

Cortical contusion

Severe TBI

Prolonged loss of consciousness

Post-traumatic amnesia >24 hours

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Patients with

Penetrating injuries

Depressed skull fractures

Cortical contusions

Significant intracranial hemorrhage

represent the highest-risk group.

So should you give seizure prophylaxis?

The short answer is: sometimes — but not for every patient with traumatic intracranial bleeding.

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ACS guidelines suggests that patients with high-risk traumatic brain injury have a lower incidence of early post-traumatic seizures when given antiseizure medications 6.

A randomized trial showed:

14.2% early seizures in placebo group

3.6% with phenytoin prophylaxis

However: This reduction did not translate into lower mortality or prevention of epilepsy 8.

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The American Academy of Neurology (AAN) guidelines conclude that 7

Prophylactic phenytoin is effective in reducing early post-traumatic seizures in patients with severe TBI.

However, antiepileptic prophylaxis does not reduce the risk of late seizures occurring after the first week.

In other words, antiseizure medications can prevent early seizures, but they do not prevent post-traumatic epilepsy.

So who should receive seizure prophylaxis?

Current recommendations from ATLS (11th edition) and the ACS Best Practices Guidelines for Traumatic Brain Injury (2024) suggest that seizure prophylaxis should be targeted to patients at higher risk of early post-traumatic seizures.

According to ATLS, prophylactic antiseizure medication is recommended in:

Severe TBI

Penetrating traumatic brain injury

Moderate TBI with high-risk lesions, including:

Depressed skull fracture
Subdural hematoma (SDH)
Epidural (extradural) hematoma
Intracerebral hematoma
Cortical contusion
Seizure occurring within 24 hours of injury

The ACS 2024 TBI guidelines similarly recommend considering antiseizure prophylaxis as part of Tier 1 ICP management, typically for 7 days, unless another indication exists to continue therapy.

When prophylaxis is usually not recommended

ATLS also highlights several situations where routine seizure prophylaxis is not recommended, including:

Mild TBI (GCS 14–15)

Isolated traumatic subarachnoid hemorrhage (tSAH)

Isolated traumatic intraventricular hemorrhage (IVH)

Small isolated SDH with GCS ≥13

In these patients, the overall seizure risk is low, and the potential benefits of prophylaxis may not outweigh the risks of medication-related adverse effects.

What about mild and moderate TBI?

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A 2024 systematic review and meta-analysis in JAMA Neurology found that seizure prophylaxis in mild and moderate TBI was associated with a small but statistically significant reduction in early post-traumatic seizures.

However, the absolute risk reduction was small, and the baseline incidence of early seizures in this population is already low.

This means the potential benefit must be weighed against:

medication adverse effects

unnecessary continuation beyond 7 days

potential cognitive side effects, particularly in older patients 9

For this reason, most guidelines still recommend selective rather than routine prophylaxis in mild TBI.

How long should prophylaxis be continued?

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All major guidelines are consistent on this point.

Seizure prophylaxis should be continued for 7 days after traumatic brain injury.

Prophylactic antiseizure medication is Istopped after 7 days, unless there is another indication to continue therapy, such as:

A seizure occurring more than 24 hours after injury

Pre-existing epilepsy requiring ongoing medication

A neurosurgical or neurological indication to continue treatment

Importantly, studies have shown that prolonged administration of antiseizure medication beyond the first week does not reduce the risk of late post-traumatic seizures or post-traumatic epilepsy.

Which drug should you use?

ATLS takes a very pragmatic stance:

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“The choice of antiseizure medication depends on availability.”

Several drugs have been studied for early post-traumatic seizure prophylaxis, including:

Phenytoin

Fosphenytoin

Levetiracetam

Valproic acid

Lacosamide

Historically, phenytoin has been the most extensively studied agent and American Academy of Neurology (AAN) recommends it.

Why many clinicians prefer levetiracetam

In modern practice, many clinicians favor levetiracetam over phenytoin.

The main reasons are practical.

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Limitations of Phenytoin :

requires therapeutic drug monitoring

has multiple drug interactions

is highly protein bound

requires monitoring of albumin levels and free drug concentrations

can cause significant adverse drug reactions

Because of these challenges, its use in critically ill patients can be complex.

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Advantages of Levetiracetam

minimal drug interactions

predictable pharmacokinetics

no routine drug level monitoring required

generally better tolerability

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Typical dosing is: 10–20 mg/kg twice daily

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Levetiracetam may cause behavioral adverse effects, particularly in patients with traumatic brain injury. Some clinicians use pyridoxine (vitamin B6) supplementation to mitigate these effects.

Drugs that should be avoided

Valproic acid is not recommended for early seizure prophylaxis in TBI.

Studies have shown that its use in this setting is associated with an increased risk of mortality compared with phenytoin.

What does the evidence say?

Current evidence suggests that levetiracetam and phenytoin have similar efficacy in preventing early post-traumatic seizures.

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The PEACH randomized trial evaluated levetiracetam prophylaxis in intracerebral hemorrhage and suggested it may reduce acute seizures, although further studies are needed to determine whether this improves functional outcomes 11

A brief word on post-traumatic epilepsy

Seizures that occur more than one week after head injury are classified as late post-traumatic seizures and often represent the onset of post-traumatic epilepsy (PTE).

Unlike early seizures, which are usually related to acute brain injury and metabolic disturbances, late seizures reflect more permanent structural and physiological changes in the brain caused by trauma.

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Traumatic brain injury is also one of the most important causes of symptomatic epilepsy in young adults, particularly in individuals aged 15–24 years.

However, an important principle should be remembered:

Antiseizure medications used in the acute phase of TBI do not prevent post-traumatic epilepsy.

Because of the lack of proven benefit and the potential for adverse drug effects, antiseizure medications are not recommended for long-term prophylaxis against epilepsy following traumatic brain injury.

Not every intracranial bleed needs levetiracetam — seizure prophylaxis should be guided by risk, not reflex.