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Safety of Overnight Switch from Brand-Name to Generic Levetiracetam

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Abstract

Background and Objective

Concerns that antiepileptic brand-to-generic interchange results in disruption of seizure control are widespread. The objective of this study was to evaluate the safety and tolerability of the brand-to-generic levetiracetam switch in patients with focal or generalized epilepsy.

Methods

A prospective study in patients with primary, cryptogenic or symptomatic epilepsy, who were taking branded levetiracetam and were switched to generic levetiracetam. Patients were consecutively recruited from January 2013 to January 2015. We evaluated efficacy, tolerability and compliance before switching (T0) and after 6 months of therapy (T1). Evaluations were scheduled as follows: baseline, 7 and 15 days, 1, 3 and 6 months. At each visit clinical diary seizures, physical and neurological examination, laboratory parameters and electroencephalogram were evaluated.

Results

Fifty-nine patients, equally mixed by sex, were included in the study. Mean age was 26.1 years. Forty-seven per cent of the patients enrolled received levetiracetam as monotherapy. One patient was lost during the follow-up: so at T1 we had 58 patients (28 monotherapy and 30 polytherapy). At T0 and at T1, there was no statistically significant difference in terms of seizure frequency and intensity, occurrence of adverse events, laboratory parameters and electroencephalographic features. Two patients stopped treatment with the generic (both at 3 months after the switch) and restarted therapy with brand levetiracetam because of seizure increase. At the end of the study, the switchback rate was 3.4 %.

Conclusions

No increase of seizures and adverse effects were observed when branded levetiracetam was interchanged to a generic equivalent. More studies should be conducted with a larger series of patients to confirm these results.

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Correspondence to Alberto Verrotti.

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Funding

No sources of funding were used to conduct this study.

Conflicts of interest

All authors declare no conflicts of interest that are relevant to the content of this study.

Ethical approval

The study was approved by Ethics Committee of the participating centers.

Informed consent

All patients provided written informed consent.

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Vari, M.S., Pinto, F., Mencaroni, E. et al. Safety of Overnight Switch from Brand-Name to Generic Levetiracetam. Clin Drug Investig 36, 87–91 (2016). https://doi.org/10.1007/s40261-015-0351-1

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  • DOI: https://doi.org/10.1007/s40261-015-0351-1

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