Описание
Acyclovir has been associated with reduced phenytoin plasma concentrations in some patients, potentially compromising seizure control during antiviral therapy.
Механизм
The precise mechanism is unclear; proposed explanations include increased renal or hepatic clearance of phenytoin, altered protein binding, or impaired absorption during GI side effects of acyclovir.
Клиническое значение
Case reports document breakthrough seizures with low phenytoin levels during acyclovir treatment; the interaction is not universally observed.
Тактика ведения
Monitor phenytoin levels during and after acyclovir courses in patients with epilepsy; increase monitoring frequency if seizure threshold changes.
Медицинский отказ от ответственности
This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.