Levetiracetam Hospira (Levetiracetam)

Levetiracetam is an antiepileptic drug that modulates neuronal excitability in various seizure types.

• Partial‑onset seizures: reduces seizure frequency and severity in focal epilepsy.
• Generalized tonic‑clonic seizures: helps achieve seizure control in primary generalized epilepsy.
• Myoclonic seizures: diminishes myoclonic jerks and improves daily functioning.

• Levetiracetam binds selectively to the synaptic vesicle protein SV2A, a key regulator of neurotransmitter release. This interaction modulates synaptic transmission, decreasing excessive neuronal firing and hyperexcitability that underlie epileptic seizures, without directly affecting ion channels or GABA receptors.

Levetiracetam may cause a range of adverse reactions, from mild to severe.

Common Side Effects

• Dizziness: transient sensation of light‑headedness.
• Fatigue: generalized tiredness or lack of energy.
• Somnolence: increased sleepiness, especially after dosing.
• Headache: mild to moderate cranial pain.
• Irritability: mood changes or increased agitation.
• Nausea: occasional stomach upset.

Serious or Rare Side Effects

• Severe allergic reactions: rash, swelling, or anaphylaxis.
• Stevens‑Johnson syndrome: rare but serious skin disorder.
• Blood dyscrasias: neutropenia or thrombocytopenia.
• Suicidal thoughts: emergence of depressive or suicidal ideation.
• Severe skin rash: toxic epidermal necrolysis.
• Respiratory depression: marked breathing difficulty when combined with other CNS depressants.

Before initiating therapy, clinicians should consider several safety aspects.

• Renal impairment: assess renal function and adjust monitoring as levetiracetam is renally excreted.
• Hepatic impairment: use caution; liver disease may alter drug handling.
• Pregnancy: risk category unknown; discuss potential benefits and risks with the patient.
• Concomitant CNS depressants: monitor for enhanced sedation or respiratory effects.
• Psychiatric symptoms: observe for mood changes, aggression, or depression.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Levetiracetam can interact with several medicines, requiring attention to dosage and monitoring.

Major Interactions (Avoid)

• Strong enzyme inducers (e.g., carbamazepine, phenytoin): may lower levetiracetam plasma levels.
• Alcohol: can increase central nervous system depression.
• Valproate: potential additive toxicity, especially for hepatic function.

Moderate Interactions (Monitor Closely)

• CNS depressants (benzodiazepines, opioids): monitor for excessive sedation.
• Renal excretion inhibitors (e.g., probenecid): may raise levetiracetam concentrations.
• Live vaccines: observe for altered immune response.