• J Palliat Med · Feb 2021

    Pharmacokinetics of Subcutaneous Levetiracetam in Palliative Care Patients.

    • Patricia Papa, Florencia Oricchio, Mariana Ginés, Cecilia Maldonado, Araceli Tashjian, Manuel Ibarra, Mariana Percovich, Pietro Fagiolino, Berta Pedragosa, and Marta Vázquez.
    • Palliative Care Clinic, Sanatorio Médica Uruguaya, Montevideo, Uruguay.
    • J Palliat Med. 2021 Feb 1; 24 (2): 248-251.

    AbstractBackground: Seizure control is challenging in the palliative care setting. Subcutaneous (SC) levetiracetam (LEV) is currently an off-label route of administration and effectiveness, tolerability, and pharmacokinetics studies for this route are scarce. Objectives: This prospective study aimed at evaluating effectiveness and tolerability of SC LEV as well as characterizing its pharmacokinetics. Subjects: Patients (n = 7) who attended the palliative care clinic between September 2018 and January 2019 with diagnosis of seizures, ≥18 years, and in need of SC route of administration were included in the study. Measurements: LEV plasma levels were determined using high-performance liquid chromatography and pharmacokinetic analysis were performed using Monolix 2018R2 (France). pH and osmolality of the three SC infusion solutions were also determined. Results: Seven patients took part in the study. Seizures were controlled in six out of seven patients with doses of 1000 and 3000 mg/day. Adverse effects were mild. pH and osmolality of the SC infusion solutions were within the accepted values reported in the literature. Mean plasma LEV concentrations were 14.4 mg/L (1000 mg/day) and 27.7 mg/L (2000 mg/day). The population clearance (2.5 L/h) and the elimination half-life (10.4 hours) were successfully estimated. Conclusions: Based on this data, SC LEV was effective and well tolerated. Pharmacokinetic parameters for the SC route were successfully determined.

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