Abstract:
BACKGROUND:Levetiracetam is a frequently used drug in the therapy of partial onset, myoclonic and generalized tonic-clonic seizures. The main route of elimination is via the kidneys, which eliminate 66% of the unchanged drug as well as 24% as inactive metabolite that stems from enzymatic hydrolysis. Therefore dose adjustments are needed in patients with chronic kidney disease stage 5 D, i.e. patients undergoing dialysis treatment. In this patient population a dose reduction by 50% is recommended, so that patients receive 250-750 mg every 12 hours. However "dialysis" can be performed in using different modalities and treatment intensities. For most of the drugs pharmacokinetic data and dosing recommendations for patients undergoing peritoneal dialysis are not available. This is the first report on levetiracetam pharmacokinetics in a peritoneal dialysis patient. CASE PRESENTATION:A 73-y-old Caucasian male (height: 160 cm, weight 93 kg, BMI 36.3 kg/m2) was admitted with a Glasgow Coma Scale of 10. Due to diabetic and hypertensive nephropathy he was undergoing peritoneal dialysis for two years. Eight weeks prior he was put on levetiracetam 500 mg twice daily for suspected partial seizures with secondary generalization. According to the patient's wife, levetiracetam lead to fatigue and somnolence leading to trauma with fracture of the metatarsal bone. Indeed, even 24 hours after discontinuation of levetiracetam blood level was still 29.8 mg/l (therapeutic range: 12 - 46 mg/l). Fatigue and stupor had disappeared five days after discontinuation of the levetiracepam. A single dose pharamockinetic after re-exposure showed an increased half life of 18.4 hours (normal half life 7 hours) and levetiracetam content in the peritoneal dialysate. Both half-life and dialysate content might help to guide dosing in this patient population. CONCLUSION:If levetiracetam is used in peritoneal dialysis patients it should be regularly monitored to avoid supratherapeutic levels that could lead to severe sequelae.
journal_name
BMC Nephroljournal_title
BMC nephrologyauthors
Bahte SK,Hiss M,Lichtinghagen R,Kielstein JTdoi
10.1186/1471-2369-15-49subject
Has Abstractpub_date
2014-04-16 00:00:00pages
49issn
1471-2369pii
1471-2369-15-49journal_volume
15pub_type
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