Anticonvulsant drugs are one of the most common causes of delayed hypersensitivity reactions, such as drug reaction with eosinophilia and systemic symptoms (DRESS), Stevens-Johnson syndrome (SJS), and toxic epidermal necrolysis (TEN). These reactions are more prevalent with aromatic anticonvulsant drugs such as phenytoin and carbamazepine. However, immediate hypersensitivity reactions such as urticaria, angioedema, and anaphylaxis with anticonvulsant drugs are rare. We describe a 51-year-old woman who developed spreading skin rashes on her wrists with urticaria and pruritus 24 h after receiving intravenous levetiracetam.

Clinicians should be aware of immediate hypersensitivity reactions with intravenous levetiracetam.