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Impact of generic s...
Impact of generic substitution on levetiracetam serum concentration : A prospective study in an outpatient setting
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- Reimers, Arne (author)
- Norwegian University of Science and Technology
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- Olsson, Patrik (author)
- Lund University,Lunds universitet,Kliniska Vetenskaper, Helsingborg,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Clinical Sciences, Helsingborg,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Helsingborg Hospital
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- Nilsson, Johanna (author)
- Lund University
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- Hoff, Elin (author)
- Lund University
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- Reis, Margareta (author)
- Skåne University Hospital
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- Strandberg, Maria (author)
- Skåne University Hospital
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- Lundgren, Anders (author)
- Helsingborg Hospital
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- Källén, Kristina (author)
- Lund University,Lunds universitet,Kliniska Vetenskaper, Helsingborg,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Clinical Sciences, Helsingborg,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital,Helsingborg Hospital
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(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- English 8 s.
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In: Epilepsy Research. - : Elsevier BV. - 1872-6844 .- 0920-1211. ; 134, s. 54-61
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Subject headings
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- BACKGROUND: Switching patients from a branded antiepileptic drug (AED) to a generic is often challenging. Several studies have shown that considerable proportions of patients report deteriorated seizure control or increased adverse effects, enforcing a switchback to the original drug. Since tolerability and seizure control usually correlate with AED serum concentrations, we examined the fluctuation of levetiracetam (LEV) serum concentrations in patients with epilepsy before and after generic substitution.METHODS: This was an 18-week, naturalistic, open, prospective, two-center study. After a baseline period of 10 weeks, 33 outpatients on stable treatment with branded LEV (Keppra(®)) either continued with this product or were switched overnight to a generic LEV preparation (1A Pharma) for an eight-week study period. Throughout the study, patients were monitored with bi-weekly LEV serum concentration measurements and seizure diaries.RESULTS: 16 out of 33 patients were switched to a generic LEV product. No switchbacks were seen. LEV dose, LEV serum concentrations, fluctuation index and concentration/dose-ratio (C/D-ratio) were not significantly different within-group (baseline vs. study period) or between-group. Large within-subject variability in serum concentrations was seen in both groups. None of the patients that were seizure-free before inclusion experienced seizures while on the generic LEV product.CONCLUSIONS: Our results show equal fluctuation of LEV serum concentrations with branded LEV and the generic LEV. Most importantly, within-subject variability was much larger than the small, non-significant differences between brands.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Anestesi och intensivvård (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Anesthesiology and Intensive Care (hsv//eng)
Keyword
- Journal Article
Publication and Content Type
- art (subject category)
- ref (subject category)
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