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Cocco M, Carnovale C, Clementi E, Barbieri MA, Battini V, Sessa M. Exploring the impact of co-exposure timing on drug-drug interactions in signal detection through spontaneous reporting system databases: a scoping review. Expert Rev Clin Pharmacol 2024; 17:441-453. [PMID: 38619027 DOI: 10.1080/17512433.2024.2343875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 04/12/2024] [Indexed: 04/16/2024]
Abstract
INTRODUCTION Drug-drug interactions (DDIs) are defined as the pharmacological effects produced by the concomitant administration of two or more drugs. To minimize false positive signals and ensure their validity when analyzing Spontaneous Reporting System (SRS) databases, it has been suggested to incorporate key pharmacological principles, such as temporal plausibility. AREAS COVERED The scoping review of the literature was completed using MEDLINE from inception to March 2023. Included studies had to provide detailed methods for identifying DDIs in SRS databases. Any methodological approach and adverse event were accepted. Descriptive analyzes were excluded as we focused on automatic signal detection methods. The result is an overview of all the available methods for DDI signal detection in SRS databases, with a specific focus on the evaluation of the co-exposure time of the interacting drugs. It is worth noting that only a limited number of studies (n = 3) have attempted to address the issue of overlapping drug administration times. EXPERT OPINION Current guidelines for signal validation focus on factors like the number of reports and temporal association, but they lack guidance on addressing overlapping drug administration times, highlighting a need for further research and method development.
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Affiliation(s)
- Marianna Cocco
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
- Department of Drug Sciences, University of Pavia, Pavia, Italy
| | - Carla Carnovale
- Pharmacovigilance & Clinical Research, International Centre for Pesticides and Health Risk Prevention, Department of Biomedical and Clinical Sciences (DIBIC), ASST Fatebenefratelli-Sacco University Hospital, Università Degli Studi di Milano, Milan, Italy
| | - Emilio Clementi
- Pharmacovigilance & Clinical Research, International Centre for Pesticides and Health Risk Prevention, Department of Biomedical and Clinical Sciences (DIBIC), ASST Fatebenefratelli-Sacco University Hospital, Università Degli Studi di Milano, Milan, Italy
- Scientific Institute, IRCCS E. Medea, Bosisio Parini, LC, Italy
| | - Maria Antonietta Barbieri
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Vera Battini
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Maurizio Sessa
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
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Yahya AA, Asiri Y, Alyami I. Social Media Analytics for Pharmacovigilance of Antiepileptic Drugs. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:8965280. [PMID: 35027943 PMCID: PMC8752219 DOI: 10.1155/2022/8965280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/04/2021] [Indexed: 11/17/2022]
Abstract
Epilepsy is a common neurological disorder worldwide and antiepileptic drug (AED) therapy is the cornerstone of its treatment. It has a laudable aim of achieving seizure freedom with minimal, if any, adverse drug reactions (ADRs). Too often, AED treatment is a long-lasting journey, in which ADRs have a crucial role in its administration. Therefore, from a pharmacovigilance perspective, detecting the ADRs of AEDs is a task of utmost importance. Typically, this task is accomplished by analyzing relevant data from spontaneous reporting systems. Despite their wide adoption for pharmacovigilance activities, the passiveness and high underreporting ratio associated with spontaneous reporting systems have encouraged the consideration of other data sources such as electronic health databases and pharmaceutical databases. Social media is the most recent alternative data source with many promising potentials to overcome the shortcomings of traditional data sources. Although in the literature some attempts have investigated the validity and utility of social media for ADR detection of different groups of drugs, none of them was dedicated to the ADRs of AEDs. Hence, this paper presents a novel investigation of the validity and utility of social media as an alternative data source for the detection of AED ADRs. To this end, a dataset of consumer reviews from two online health communities has been collected. The dataset is preprocessed; the unigram, bigram, and trigram are generated; and the ADRs of each AED are extracted with the aid of consumer health vocabulary and ADR lexicon. Three widely used measures, namely, proportional reporting ratio, reporting odds ratio, and information component, are used to measure the association between each ADR and AED. The resulting list of signaled ADRs for each AED is validated against a widely used ADR database, called Side Effect Resource, in terms of the precision of ADR detection. The validation results indicate the validity of online health community data for the detection of AED ADRs. Furthermore, the lists of signaled AED ADRs are analyzed to answer questions related to the common ADRs of AEDs and the similarities between AEDs in terms of their signaled ADRs. The consistency of the drawn answers with the existing pharmaceutical knowledge suggests the utility of the data from online health communities for AED-related knowledge discovery tasks.
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Affiliation(s)
- Anwar Ali Yahya
- Department of Computer Science, Najran University, Najran, Saudi Arabia
| | - Yousef Asiri
- Department of Computer Science, Najran University, Najran, Saudi Arabia
| | - Ibrahim Alyami
- Department of Computer Science, Najran University, Najran, Saudi Arabia
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Franco V, Barbieri MA, Cutroneo PM, Arena I, Cicala G, Marchione P, Spina E, Perucca E. Pediatric adverse reactions to antiseizure medications - An analysis of data from the Italian spontaneous reporting system (2001-2019). Epilepsy Behav 2021; 119:107989. [PMID: 33946010 DOI: 10.1016/j.yebeh.2021.107989] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/07/2021] [Accepted: 04/07/2021] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Spontaneous reports of adverse drug reactions (ADRs) are a valuable supplement to clinical studies in informing about the safety of medications. This is especially relevant for pediatric populations, which are not often included in large-scale clinical trials. OBJECTIVES To evaluate patterns of pediatric ADRs to antiseizure medications (ASMs) reported to the Italian Spontaneous Reporting System (SRS) database during the period November 1, 2001─May 31, 2019. METHODS Suspected ADRs ascribed to medications listed under ATC code N03, plus clobazam (code N05BA09), and affecting individuals below age 18 years were sourced from the Italian SRS database, categorized based on a modification of the MedDRA® high-level term, and analyzed using descriptive statistics. RESULTS A total of 956 reports listing a total of 1806 ADRs ascribed to one or more ASMs were received for individuals in pediatric age. The most commonly reported ADRs were skin rashes (24.0% of all reports), epileptic seizures (12.6%), gastrointestinal disturbances (11.8%), and somnolence (10.6%). A more detailed analysis was conducted on 675 reports listing a single ASM as suspected drug and occurring in patients with a specified or presumed diagnosis of epilepsy. Adverse drug reaction patterns differed widely across ASMs. Skin rashes were the most commonly reported ADR for lamotrigine (62.3%), carbamazepine (50.3%), phenobarbital (42.3%), and oxcarbazepine (33.0%). Other most commonly reported ADRs were gastrointestinal symptoms for ethosuximide (44%), irritability/aggression for levetiracetam (25.0%), epileptic seizures for valproic acid (16.1%), fever (often associated with hypohidrosis) for topiramate (17.9%), and utilization error (mostly accidental drug administration) for clonazepam (34.6%). CONCLUSIONS Patterns of spontaneous ADR reports are indicative of major differences in safety profile among individual ASMs. Most, but not all, frequently reported ADRs were in line with findings from clinical trials and observational studies.
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Affiliation(s)
- Valentina Franco
- Division of Clinical and Experimental Pharmacology, Department of Internal Medicine and Therapeutics, University of Pavia, Pavia, Italy; IRCCS Mondino Foundation, Pavia, Italy
| | | | - Paola Maria Cutroneo
- Sicilian Regional Pharmacovigilance Centre, University Hospital of Messina, Messina, Italy
| | - Ignazio Arena
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giuseppe Cicala
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | | | - Edoardo Spina
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Emilio Perucca
- Division of Clinical and Experimental Pharmacology, Department of Internal Medicine and Therapeutics, University of Pavia, Pavia, Italy.
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Madan A, Donovan PJ, Risetto T, Trenerry H, Lander CM. Monitoring for valproate and phenytoin toxicity in hypoalbuminaemia: A retrospective cohort study. Br J Clin Pharmacol 2021; 87:4341-4353. [PMID: 33835518 DOI: 10.1111/bcp.14853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/14/2021] [Accepted: 03/31/2021] [Indexed: 11/28/2022] Open
Abstract
AIMS Equations to calculate albumin-adjusted total concentrations have been validated to correlate with measured free concentrations for both phenytoin and valproate, but there is a lack of data to assess correlation with clinical outcomes. We aimed to assess the association of hypoalbuminaemia and albumin-adjusted total concentrations with concentration-dependent toxicity for phenytoin and valproate and review the impact on management decisions following concentration monitoring in hypoalbuminaemia. METHODS Patients undergoing concentration monitoring for phenytoin or valproate between January and December 2018 were included. Patients were identified using a centralised laboratory database with data extracted from medical records. RESULTS Total phenytoin concentrations were measured for 144 patients, with hypoalbuminaemia (≤30 g L-1 ) recorded in 59 (41%) patients. Albumin-adjusted phenytoin concentration >20 mg L-1 was associated with increased neurological adverse effects (77% vs. 43%, P < .001). On logistic regression, higher albumin-adjusted phenytoin concentration was an independent risk factor for neurotoxicity (OR 1.06, 95% CI 1.01-1.12, P = .011). Total valproate concentrations were measured for 383 patients, with hypoalbuminaemia (≤30 g L-1 ) noted in 53 (14%) patients. For the valproate cohort, hypoalbuminaemia (42% vs. 28%, P = .039) and albumin-adjusted valproate concentration >100 mg L-1 (49% vs. 23%, P < .001) were both associated with increased neurotoxicity. On multiple logistic-regression, valproate daily dose (aOR = 1.01, 95% CI 1.00-1.02, P = .006) and albumin-adjusted valproate concentration (aOR 1.01, 95% CI 1.00-1.02, P = .033) were independent risk factors for neurotoxicity after accounting for confounders. CONCLUSION While measuring free drug concentrations in hypoalbuminaemia would be ideal, the adjustment equations can help identify vulnerable patients needing further assessment of potential concentration-dependent toxicity.
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Affiliation(s)
- Arushi Madan
- Clinical Pharmacology, Royal Brisbane & Women's Hospital, Brisbane, Australia.,Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - Peter J Donovan
- Clinical Pharmacology, Royal Brisbane & Women's Hospital, Brisbane, Australia.,Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - Tracy Risetto
- Queensland Medicines Advice and Information Service, Royal Brisbane & Women's Hospital, Brisbane, Australia
| | - Helen Trenerry
- Queensland Medicines Advice and Information Service, Royal Brisbane & Women's Hospital, Brisbane, Australia
| | - Cecilie M Lander
- Faculty of Medicine, University of Queensland, Brisbane, Australia.,Neurology, Royal Brisbane & Women's Hospital, Brisbane, Australia
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Safety aspects of antiepileptic drugs—a population-based study of adverse effects relative to changes in utilisation. Eur J Clin Pharmacol 2019; 75:1153-1160. [DOI: 10.1007/s00228-019-02678-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 04/09/2019] [Indexed: 12/11/2022]
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The Impact of Pharmacokinetic Interactions With Eslicarbazepine Acetate Versus Oxcarbazepine and Carbamazepine in Clinical Practice. Ther Drug Monit 2017; 38:499-505. [PMID: 27414974 DOI: 10.1097/ftd.0000000000000306] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Eslicarbazepine acetate (ESL) is a new anti-epileptic drug (AED) chemically related to oxcarbazepine (OXC) and carbamazepine (CBZ) and is increasingly used in clinical practice. The purpose of the study was to investigate 2-way pharmacokinetic interactions between ESL and other AEDs as compared to OXC and CBZ. METHODS Anonymous data regarding age, gender, use of AEDs, daily doses and serum concentration measurements of ESL, OXC, CBZ and lamotrigine (LTG) and other AEDs were retrieved from 2 therapeutic drug monitoring (TDM) databases in Norway. Drugs were categorized according to their known potential for interactions. Concentration/dose (C/D) ratios were calculated. RESULTS Data from 1100 patients were available. The C/D ratios of ESL and OXC were unchanged in combination with enzyme-inducing AEDs or valproate (VPA). The C/D ratio of CBZ decreased by 40% and 22% in combination with other enzyme-inducing AEDs or VPA, respectively, pointing to an increased clearance. ESL demonstrated no significant enzyme-inducing effect on LTG metabolism although there was a 20% and 34% decrease in the C/D ratio of LTG in combination with OXC and CBZ, respectively. CONCLUSIONS Possible pharmacokinetic interactions have been studied for ESL as compared to OXC and CBZ. The pharmacokinetics of ESL is not affected by enzyme-inducing AEDs or VPA and does not affect the metabolism of LTG in contrast to OXC and CBZ. The study demonstrates the value of using TDM databases to explore the potential for pharmacokinetic interactions of new AEDs.
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Pharmacokinetic variability, efficacy and tolerability of eslicarbazepine acetate-A national approach to the evaluation of therapeutic drug monitoring data and clinical outcome. Epilepsy Res 2016; 129:125-131. [PMID: 28043062 DOI: 10.1016/j.eplepsyres.2016.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/29/2016] [Accepted: 12/03/2016] [Indexed: 12/16/2022]
Abstract
BACKGROUND Eslicarbazepine acetate (ESL) is a new antiepileptic drug (AED), still insufficiently studied regarding pharmacokinetic variability, efficacy and tolerability. The purpose of this study was to evaluate therapeutic drug monitoring (TDM) data in Norway and relate pharmacokinetic variability to clinical efficacy and tolerability in a long-term clinical setting in patients with refractory epilepsy. METHODS This retrospective observational study included TDM-data from the main laboratories and population data from the Norwegian Prescription Database in Norway, in addition to clinical data from medical records of adult patients using ESL for up to three years, whenever possible. RESULTS TDM-data from 168 patients were utilized for assessment of pharmacokinetic variability, consisting of 71% of the total number of patients in Norway using ESL, 2011-14. Median daily dose of ESL was 800mg (range 400-1600mg), and median serum concentration of ESL was 53μmol/L (range 13-132μmol/L). Inter-patient variability of ESL was extensive, with 25-fold variability in concentration/dose ratios. Additional clinical data were available from 104 adult patients out of the 168, all with drug resistant focal epilepsy. After 1, 2 and 3 years follow-up, the retention rate of ESL was 83%, 72% and 64%, respectively. ESL was generally well tolerated as add-on treatment, but sedation, cognitive impairment and hyponatremia were reported. Hyponatremia (sodium <137mmol/L) was present in 36% of the patients, and lead to discontinuation in three. CONCLUSION Pharmacokinetic variability of ESL was extensive and the demonstration of usefulness of TDM requires further studies. In patients with drug resistant focal Epilepsy, the high retention rate indicated good efficacy and tolerability. Hyponatremia was observed in one third of the patients. The present results point to a need for individualization of treatment and TDM may be useful.
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Johannessen Landmark C, Henning O, Johannessen SI. Proconvulsant effects of antidepressants - What is the current evidence? Epilepsy Behav 2016; 61:287-291. [PMID: 26926001 DOI: 10.1016/j.yebeh.2016.01.029] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 01/23/2016] [Accepted: 01/25/2016] [Indexed: 11/16/2022]
Abstract
Antidepressant drugs may have proconvulsant effects. Psychiatric comorbidity in epilepsy is common. Prescribers might be reluctant to initiate treatment with antidepressants in fear of seizure aggravation. The purpose of this review was to focus upon the current evidence for proconvulsant effects of antidepressants and possible clinical implications. Most antidepressants are regarded as safe and may be used in patients with epilepsy, such as the newer serotonin and/or noradrenaline reuptake inhibitors. Four older drugs should, however, be avoided or used with caution; amoxapine, bupropion, clomipramine and maprotiline. Proconvulsant effects are concentration-related. Optimization of drug treatment includes considerations of pharmacokinetic variability to avoid high serum concentrations of the most proconvulsant antidepressants. The risk of seizures is regarded as small and should, therefore, not hamper the pharmacological treatment of depression in people with epilepsy.
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Affiliation(s)
- Cecilie Johannessen Landmark
- Dept. of Life Sciences and Health, Programme for Pharmacy, Faculty of Health Science, Oslo and Akershus University College of Applied Sciences, Oslo, Norway; The National Center for Epilepsy, Sandvika, Oslo University Hospital, Oslo, Norway; Department of Pharmacology, Oslo University Hospital, Oslo, Norway.
| | - Oliver Henning
- The National Center for Epilepsy, Sandvika, Oslo University Hospital, Oslo, Norway
| | - Svein I Johannessen
- The National Center for Epilepsy, Sandvika, Oslo University Hospital, Oslo, Norway; Department of Pharmacology, Oslo University Hospital, Oslo, Norway
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Baftiu A, Johannessen Landmark C, Rusten IR, Feet SA, Johannessen SI, Larsson PG. Changes in utilisation of antiepileptic drugs in epilepsy and non-epilepsy disorders-a pharmacoepidemiological study and clinical implications. Eur J Clin Pharmacol 2016; 72:1245-1254. [PMID: 27411937 DOI: 10.1007/s00228-016-2092-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 07/01/2016] [Indexed: 12/29/2022]
Abstract
PURPOSE The purpose of this study was to investigate changes in utilisation of antiepileptic drugs (AEDs) in epilepsy and non-epilepsy disorders in Norway and furthermore to study the retention rates of the most commonly used AEDs in these indications in long-term use. METHODS The data consisted of all prescriptions of AEDs from Norwegian pharmacies in the Norwegian Prescription Database (NorPD) (2004-2012). Variables included anonymous data regarding age, gender, diagnosis specific reimbursement codes and utilisation of AEDs. RESULTS In recent years (2008-2012), the utilisation of AEDs in non-epilepsy disorders accounted for 45-53 % of the total use. In epilepsy, the most commonly used AED was lamotrigine, followed by levetiracetam, carbamazepine and valproate. Lamotrigine was also the predominant AED used in psychiatry, while pregabalin and gabapentin were mostly used in neuropathic pain. In migraine, topiramate predominated but accounted for <1 % of the total utilisation of AEDs. The majority of prescriptions were by general practitioners and only 20 % by specialists. Regardless of indication, newer AEDs had higher retention rates (34-48 %) and were used for a longer period before discontinuation. CONCLUSIONS The use of AEDs in non-epilepsy disorders is increasing and accounted for 53 % in 2012. Newer AEDs were predominantly used and demonstrated higher retention rates than older AEDs in all indications. This nationwide study demonstrates an increased exposure to AEDs in new patient groups, and details in prescription patterns and clinical and safety considerations should be closely monitored. This contributes to long-term post-marketing data of AED and accordingly improved pharmacovigilance.
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Affiliation(s)
- Arton Baftiu
- Programme for Pharmacy, Department of Life Sciences and Health, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
| | - Cecilie Johannessen Landmark
- Programme for Pharmacy, Department of Life Sciences and Health, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway. .,The National Center for Epilepsy, Sandvika, Oslo University Hospital, Oslo, Norway. .,Department of Pharmacology, Oslo University Hospital, Oslo, Norway.
| | - Ida Rudberg Rusten
- Programme for Pharmacy, Department of Life Sciences and Health, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
| | - Silje Andrea Feet
- Programme for Pharmacy, Department of Life Sciences and Health, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
| | - Svein I Johannessen
- The National Center for Epilepsy, Sandvika, Oslo University Hospital, Oslo, Norway.,Department of Pharmacology, Oslo University Hospital, Oslo, Norway
| | - Pål G Larsson
- Department of Neurosurgery, Oslo University Hospital, Oslo, Norway
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Hilgers A, Schaefer M. Systematic Adverse Drug Reaction Monitoring of Patients Under Newer Antiepileptic Drugs Using Routine Clinical Data of Inpatients. Drugs Real World Outcomes 2016; 3:209-221. [PMID: 27398300 PMCID: PMC4914536 DOI: 10.1007/s40801-016-0077-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Based on data of clinical trials, new agents are receiving approval to the pharmaceutical market, for which information concerning safety issues under real-life conditions is not yet available. OBJECTIVES The aim was to evaluate the tolerability of newer antiepileptic drugs (AEDs), such as topiramate, levetiracetam, zonisamide, pregabalin, extended-release oxcarbazepine, lacosamide and eslicarbazepine, under real-life conditions by means of an assessment of routine clinical data of inpatients. METHOD Over 2.75 years data of all inpatients receiving one of the newer AEDs were documented. Occurring adverse drug reactions (ADRs) were classified according to the WHO-UMC Causality Assessment concerning their likely relationship to the prescribed AEDs. For each AED, the total number of patients without and with ADRs, assessed as at least possibly related to the particular drug, was calculated and corresponding incidences compared with reference data provided in the Summary of Product Characteristics (SmPC). For statistical evaluation Spearman correlation (rs), estimated relative risk and logistic regression analysis were used. RESULTS In total, the data of 562 patients were assessed, of which 90 % received up to six different AEDs. The proportion of off-label use with regard to dosage varied between 6.4 and 64.7 %. Levetiracetam and oxcarbazepine as an extended-release formulation were most commonly used, and levetiracetam showed the best tolerance. By using logistic regression, the occurrence of ADRs was significantly associated with the number of AEDs (p < 0.001) as well as the defined daily doses (p = 0.003). In total, ADRs of AEDs were documented for 318 patients (56.6 %). The most common referred to electrolyte imbalance, e.g., low sodium (n = 79, 14.1 %) and potassium (n = 25, 4.4 %) levels, the central nervous system, including dizziness (n = 61, 10.9 %), disturbed vision (n = 47, 8.4 %), fatigue (n = 40, 7.1 %), nystagmus (n = 36, 6.4 %) and ataxia (n = 29, 5.2 %), or cognitive deficits, especially disturbance of speech (n = 37, 6.6 %), memory impairment (n = 36, 6.4 %) and mental slowing (n = 32, 5.7 %). By comparing the assessed ADR incidences with specification data, for some ADRs, a probable underestimation by the SmPC of respective risk could be assumed. CONCLUSION During inpatient treatment, valuable data are generated, which are currently rarely utilized for pharmacoepidemiologic or pharmacovigilance purposes. A systematic evaluation of these data can increase the probability of detecting ADRs and can promote real-life-related drug surveillance.
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Affiliation(s)
- Annika Hilgers
- Ev. Krankenhaus Bielefeld gGmbH, Bethesdaweg 10, 33617 Bielefeld, Germany
- Epilepsiezentrum Bethel, Krankenhaus Mara gGmbH, 33617 Bielefeld, Germany
- Charité Universitätsmedizin Berlin, Institut für klinische Pharmakologie, 10115 Berlin, Germany
| | - Marion Schaefer
- Charité Universitätsmedizin Berlin, Institut für klinische Pharmakologie, 10115 Berlin, Germany
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Baldelli S, Cattaneo D, Giodini L, Baietto L, Di Perri G, D'Avolio A, Clementi E. Development and validation of a HPLC-UV method for the quantification of antiepileptic drugs in dried plasma spots. Clin Chem Lab Med 2016; 53:435-44. [PMID: 25153419 DOI: 10.1515/cclm-2014-0472] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 07/21/2014] [Indexed: 02/04/2023]
Abstract
BACKGROUND Therapeutic drug monitoring (TDM) of antiepileptic drugs is widely used in clinical practice to optimise therapy, but it is limited by technical problems and cost considerations. The aim of the present study was: 1) to validate a chromatographic method for the concomitant determination of levetiracetam, lamotrigine, ethosuximide, felbamate, rufinamide, zonisamide and monohydroxycarbamazepine; 2) to develop it for dried plasma spot (DPS) assessing its reliability against the classical determination from plasma; and 3) test its clinical application. METHODS Extraction of plasma samples and DPS was done by simple precipitation. Chromatographic analysis was performed using high performance liquid chromatography with ultraviolet detection. After validation, both methods were applied for the quantification of plasma samples from patients on antiepileptic therapy. RESULTS Mean inter- and intra-day accuracy and precision were <15% for all compounds both in plasma and in DPS samples. DPS samples were considered stable under tested conditions. Measurements between plasma and DPS samples appeared related (p<0.0001). Bland-Altman analysis revealed accordance in lamotrigine values with mean overestimation of concentration for DPS sample of 2.8%. Also for monohydroxycarbamazepine data the agreement was acceptable (mean overestimation of 9.2%). For levetiracetam mean difference was 7.6%, while for ethosuximide mean percentage difference was 20.6%. CONCLUSIONS The developed methods simplify TDM of antiepileptic drugs. This is particularly relevant for the method on dried spot sample devices because it facilitates further sample handling, stability and shipments making the management of therapies in epileptic patients easier also in hospitals devoid of a dedicated laboratory.
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Johannessen Landmark C, I Johannessen S. Pharmacotherapy in epilepsy – does gender affect safety? Expert Opin Drug Saf 2015; 15:1-4. [DOI: 10.1517/14740338.2016.1117606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Baftiu A, Johannessen Landmark C, Nikaj V, Neslein IL, Johannessen SI, Perucca E. Availability of antiepileptic drugs across Europe. Epilepsia 2015; 56:e191-7. [PMID: 26477534 DOI: 10.1111/epi.13210] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2015] [Indexed: 01/04/2023]
Abstract
Europe consists of 53 countries with widely different economic conditions and different political, educational, and health care systems. This study was aimed at determining the availability of antiepileptic drugs (AEDs) across Europe. An electronic questionnaire was submitted to all 43 European chapters of the International League Against Epilepsy (ILAE). Outcome measures were availability of older, newer, and newest AEDs, generic products, indications, reimbursement rules, and reasons for lack of availability of AEDs. Countries were divided according to economic status as defined by the World Bank. Thirty-four chapters (79%) provided data. There were large differences in AED availability across countries, especially between high-income countries and the other countries. The newest AEDs were not available in any of the 12 non-high-income countries. Availability was higher in countries with public reimbursement systems. Reimbursement policies ranged from full reimbursement for all AEDs to complete lack of reimbursement. Main hurdles for poor access to AEDs included lack of regulatory approval, high prices and reimbursement restrictions. The availability of AEDs differs across European countries, with many hurdles hampering access to epilepsy medicines, particularly to new medications. These findings raise major concerns on the quality of epilepsy care in many countries.
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Affiliation(s)
- Arton Baftiu
- Department of Life Sciences and Health, Program for Pharmacy, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
| | - Cecilie Johannessen Landmark
- Department of Life Sciences and Health, Program for Pharmacy, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway.,Department of Clinical Pharmacology, The National Center for Epilepsy, Oslo University Hospital, Oslo, Norway
| | - Valent Nikaj
- Department of Economics, Faculty of Social Sciences, University of Oslo, Oslo, Norway
| | - Inger-Lise Neslein
- Department of Life Sciences and Health, Program for Pharmacy, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
| | - Svein I Johannessen
- Department of Clinical Pharmacology, The National Center for Epilepsy, Oslo University Hospital, Oslo, Norway
| | - Emilio Perucca
- Department on Internal Medicine and Therapeutics, University of Pavia, and C. Mondino National Neurological Institute, Pavia, Italy
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Pichler EM, Hattwich G, Grunze H, Muehlbacher M. Safety and tolerability of anticonvulsant medication in bipolar disorder. Expert Opin Drug Saf 2015; 14:1703-24. [PMID: 26359219 DOI: 10.1517/14740338.2015.1088001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Anticonvulsants (AC) are widely used and recommended as a treatment option in different phases of bipolar disorder (BD). In contrast to ample evidence for efficacy in acute mania, there is generally less unambiguous evidence for maintenance treatment or bipolar depression, and data on long-term tolerability in BD are sparse, although this varies greatly between different compounds. This review summarizes the clinically relevant tolerability and safety profile of ACs commonly used for the treatment of BD based on findings from randomized controlled trials (RCT). AREAS COVERED Systematic search of the English literature between January 1991 and May 2015 revealed a total of nine RCTs investigating valproate, five RCTs with carbamazepine and 8 with lamotrigine For these ACs we found information on side effect profiles for both acute and maintenance RCTs, albeit of varying quality, whereas for topiramate (five RCTs), gabapentin and esclicarbazepine acetate (one RCT each) only acute treatment RCTs have been published. Descriptive side effect profiles from open-label studies exist for several other ACs rarely used in BD, and are included in this review as a brief narrative chapter. EXPERT OPINION Whereas both valproate and carbamazepine are associated with, in part, severe adverse events, lamotrigine emerges as a relatively safe and well tolerated treatment option, especially in maintenance treatment and prevention of depressive relapse in BD. Lack of proven efficacy and side effect profile of other, less rigorously studied ACs restricts their use only to very selected BD cases.
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Affiliation(s)
- Eva Maria Pichler
- a Paracelsus Private Medical University, Department of Psychiatry and Psychotherapy , Ignaz Harrer Strasse 79, 5020 Salzburg, Austria +43 6 62 44 83 43 00 ; +43 6 62 44 83 43 04 ;
| | - Georg Hattwich
- a Paracelsus Private Medical University, Department of Psychiatry and Psychotherapy , Ignaz Harrer Strasse 79, 5020 Salzburg, Austria +43 6 62 44 83 43 00 ; +43 6 62 44 83 43 04 ;
| | - Heinz Grunze
- a Paracelsus Private Medical University, Department of Psychiatry and Psychotherapy , Ignaz Harrer Strasse 79, 5020 Salzburg, Austria +43 6 62 44 83 43 00 ; +43 6 62 44 83 43 04 ;
| | - Moritz Muehlbacher
- a Paracelsus Private Medical University, Department of Psychiatry and Psychotherapy , Ignaz Harrer Strasse 79, 5020 Salzburg, Austria +43 6 62 44 83 43 00 ; +43 6 62 44 83 43 04 ;
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Roitmann E, Eriksson R, Brunak S. Patient stratification and identification of adverse event correlations in the space of 1190 drug related adverse events. Front Physiol 2014; 5:332. [PMID: 25249979 PMCID: PMC4158870 DOI: 10.3389/fphys.2014.00332] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 08/12/2014] [Indexed: 11/13/2022] Open
Abstract
Purpose: New pharmacovigilance methods are needed as a consequence of the morbidity caused by drugs. We exploit fine-grained drug related adverse event information extracted by text mining from electronic medical records (EMRs) to stratify patients based on their adverse events and to determine adverse event co-occurrences. Methods: We analyzed the similarity of adverse event profiles of 2347 patients extracted from EMRs from a mental health center in Denmark. The patients were clustered based on their adverse event profiles and the similarities were presented as a network. The set of adverse events in each main patient cluster was evaluated. Co-occurrences of adverse events in patients (p-value < 0.01) were identified and presented as well. Results: We found that each cluster of patients typically had a most distinguishing adverse event. Examination of the co-occurrences of adverse events in patients led to the identification of potentially interesting adverse event correlations that may be further investigated as well as provide further patient stratification opportunities. Conclusions: We have demonstrated the feasibility of a novel approach in pharmacovigilance to stratify patients based on fine-grained adverse event profiles, which also makes it possible to identify adverse event correlations. Used on larger data sets, this data-driven method has the potential to reveal unknown patterns concerning adverse event occurrences.
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Affiliation(s)
- Eva Roitmann
- Department of Disease Systems Biology, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen Copenhagen, Denmark ; Department of Systems Biology, Center for Biological Sequence Analysis, Technical University of Denmark Lyngby, Denmark
| | - Robert Eriksson
- Department of Disease Systems Biology, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen Copenhagen, Denmark ; Department of Systems Biology, Center for Biological Sequence Analysis, Technical University of Denmark Lyngby, Denmark
| | - Søren Brunak
- Department of Disease Systems Biology, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen Copenhagen, Denmark ; Department of Systems Biology, Center for Biological Sequence Analysis, Technical University of Denmark Lyngby, Denmark
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de Groot MCH, Schuerch M, de Vries F, Hesse U, Oliva B, Gil M, Huerta C, Requena G, de Abajo F, Afonso AS, Souverein PC, Alvarez Y, Slattery J, Rottenkolber M, Schmiedl S, Van Dijk L, Schlienger RG, Reynolds R, Klungel OH. Antiepileptic drug use in seven electronic health record databases in Europe: A methodologic comparison. Epilepsia 2014; 55:666-673. [DOI: 10.1111/epi.12557] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Mark C. H. de Groot
- Division of Pharmacoepidemiology & Clinical Pharmacology; Faculty of Science; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht The Netherlands
| | - Markus Schuerch
- Epidemiology, Patient-Reported Outcomes, and Healthcare Data Strategy; F. Hoffmann-La Roche; Basel Switzerland
| | - Frank de Vries
- Division of Pharmacoepidemiology & Clinical Pharmacology; Faculty of Science; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht The Netherlands
- Department of Clinical Pharmacy and Toxicology; Maastricht University Medical Centre; Maastricht The Netherlands
| | - Ulrik Hesse
- National Institute for Health Data and Disease Control; Copenhagen Denmark
| | - Belén Oliva
- Agencia Española de Medicamentos y Productos Sanitarios; Madrid Spain
| | - Miguel Gil
- Agencia Española de Medicamentos y Productos Sanitarios; Madrid Spain
| | - Consuelo Huerta
- Agencia Española de Medicamentos y Productos Sanitarios; Madrid Spain
| | - Gema Requena
- Pharmacology Section; Department of Biomedical Sciences II; University of Alcalá; Madrid Spain
| | - Francisco de Abajo
- Pharmacology Section; Department of Biomedical Sciences II; University of Alcalá; Madrid Spain
- Clinical Pharmacology Unit; University Hospital Príncipe de Asturias; Madrid Spain
| | - Ana S. Afonso
- Division of Pharmacoepidemiology & Clinical Pharmacology; Faculty of Science; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht The Netherlands
| | - Patrick C. Souverein
- Division of Pharmacoepidemiology & Clinical Pharmacology; Faculty of Science; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht The Netherlands
| | | | - Jim Slattery
- European Medicines Agency; London United Kingdom
| | - Marietta Rottenkolber
- Institute for Medical Information Sciences, Biometry, and Epidemiology; Ludwig-Maximilians-Universität-München; Munich Germany
| | - Sven Schmiedl
- Department of Clinical Pharmacology; Faculty of Health; School of Medicine; Witten/Herdecke University; Witten Germany
- Philipp Klee-Institute for Clinical Pharmacology; Helios Clinic Wuppertal; Wuppertal Germany
| | - Liset Van Dijk
- Division of Pharmacoepidemiology & Clinical Pharmacology; Faculty of Science; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht The Netherlands
- NIVEL; Netherlands Institute for Health Services Research; Utrecht The Netherlands
| | | | | | - Olaf H. Klungel
- Division of Pharmacoepidemiology & Clinical Pharmacology; Faculty of Science; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Utrecht The Netherlands
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Korczyn AD, Schachter SC, Brodie MJ, Dalal SS, Engel J, Guekht A, Hecimovic H, Jerbi K, Kanner AM, Landmark CJ, Mares P, Marusic P, Meletti S, Mula M, Patsalos PN, Reuber M, Ryvlin P, Štillová K, Tuchman R, Rektor I. Epilepsy, cognition, and neuropsychiatry (Epilepsy, Brain, and Mind, part 2). Epilepsy Behav 2013; 28:283-302. [PMID: 23764496 PMCID: PMC5016028 DOI: 10.1016/j.yebeh.2013.03.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/28/2013] [Indexed: 12/13/2022]
Abstract
Epilepsy is, of course, not one disease but rather a huge number of disorders that can present with seizures. In common, they all reflect brain dysfunction. Moreover, they can affect the mind and, of course, behavior. While animals too may suffer from epilepsy, as far as we know, the electrical discharges are less likely to affect the mind and behavior, which is not surprising. While the epileptic seizures themselves are episodic, the mental and behavioral changes continue, in many cases, interictally. The episodic mental and behavioral manifestations are more dramatic, while the interictal ones are easier to study with anatomical and functional studies. The following extended summaries complement those presented in Part 1.
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Affiliation(s)
- Amos D. Korczyn
- Sackler School of Medicine, Tel Aviv University, Ramat Aviv 69978, Israel
| | - Steven C. Schachter
- Center for Integration of Medicine and Innovative Technology, Harvard Medical School, Boston, MA, USA
| | | | - Sarang S. Dalal
- Zukunftskolleg & Department of Psychology, University of Konstanz, Germany
- Lyon Neuroscience Research Center (CRNL), INSERM U1028, CNRS UMR5292, University Lyon I, Brain Dynamics and Cognition Team, Lyon, France
| | | | - Alla Guekht
- Russian National Research Medical University, Moscow City Hospital No. 8 for Neuropsychiatry, Moscow, Russia
| | - Hrvoje Hecimovic
- Zagreb Epilepsy Center, Department of Neurology, University Hospital, Zagreb, Croatia
| | - Karim Jerbi
- Lyon Neuroscience Research Center (CRNL), INSERM U1028, CNRS UMR5292, University Lyon I, Brain Dynamics and Cognition Team, Lyon, France
| | - Andres M. Kanner
- Department of Neurology, University of Miami, Miller School of Medicine, Miami FL, USA
| | - Cecilie Johannessen Landmark
- Department of Pharmacy and Biomedical Science, Oslo, Norway
- Akershus University College of Applied Sciences, Oslo, Norway
| | - Pavel Mares
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Petr Marusic
- Department of Neurology, Charles University in Prague, 2nd Faculty of Medicine, Motol University Hospital, Prague, Czech Republic
| | - Stefano Meletti
- Department of Biomedical Sciences, Metabolism, and Neuroscience, University of Modena and Reggio Emilia, Modena, Italy
| | - Marco Mula
- Amedeo Avogadro University, Novara, Italy
| | - Philip N. Patsalos
- Department of Clinical and Experimental Epilepsy, UCL-Institute of Neurology, London and Epilepsy Society, Chalfont St Peter, UK
| | - Markus Reuber
- Academic Neurology Unit, University of Sheffield, Royal Hallamshire Hospital, Sheffield, UK
| | - Philippe Ryvlin
- Service de neurologie fonctionnelle et d’épileptologie, Hôpital Neurologique, HCL TIGER, CRNL, INSERM U1028, UMR-CNRS 5292, Université Lyon-1, Lyon, France
| | - Klára Štillová
- Masaryk University, Brno Epilepsy Center, St. Anne’s Hospital and School of Medicine, and Central European Institute of Technology (CEITEC), Brno, Czech Republic
| | - Roberto Tuchman
- Autism and Neurodevelopment Program, Miami Children’s Hospital Dan Marino Center, Departments of Neurology and Psychiatry, Herbert Wertheim College of Medicine, Florida International University, FL, USA
| | - Ivan Rektor
- Masaryk University, Brno Epilepsy Center, St. Anne’s Hospital and School of Medicine, and Central European Institute of Technology (CEITEC), Brno, Czech Republic
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Pharmacokinetic variability of four newer antiepileptic drugs, lamotrigine, levetiracetam, oxcarbazepine, and topiramate: a comparison of the impact of age and comedication. Ther Drug Monit 2013; 34:440-5. [PMID: 22777154 DOI: 10.1097/ftd.0b013e31825ee389] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Newer antiepileptic drugs (AEDs) are widely used in patients with epilepsy. There is still insufficient documentation regarding pharmacokinetic variability of these AEDs in different patient groups. PURPOSE The purpose of this study was to compare age and comedication as factors contributing to pharmacokinetic variability between 4 newer AEDs (lamotrigine, levetiracetam, oxcarbazepine, and topiramate) among patients with refractory epilepsy. METHODS Data regarding age, gender, use of AEDs, daily doses, and serum concentration measurements were retrieved from a therapeutic drug monitoring database, from patients admitted to the National Center for Epilepsy, Norway, 2007-2008. RESULTS In total, 1050 patients were included, 111 younger children (2-9 years), 137 older children (10-17 years), 720 adults (18-64 years), 82 elderly (65-93 years). Fifty percent of the patients were prescribed polytherapy, in 88 different combinations. The interindividual pharmacokinetic variability was extensive, as illustrated by a 10-fold variability in serum concentration compared with dose. Age affected the apparent clearance of levetiracetam to the largest extent, as shown by a 60% increase in younger children and a 40% reduction in the elderly, respectively, compared with adults. Comedication altered the clearance of lamotrigine to the greatest extent ±70% because it is affected by both enzyme inducers and inhibitors. Hepatic enzyme inducers increased the clearance of levetiracetam and topiramate by 25% and oxcarbazepine by 75%. Valproic acid reduced the clearance of topiramate by 25%. CONCLUSION Age and comedication are important contributors to pharmacokinetic variability. Age had the greatest impact on levetiracetam, and comedication affected the clearance of each of the 4 AEDs investigated in this study. Pharmacokinetic drug interactions must be carefully considered when multidrug therapies are prescribed. Therapeutic drug monitoring is a valuable tool for individualizing AED therapy.
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Stankov K, Sabo A, Mikov M. Pharmacogenetic Biomarkers as Tools for Pharmacoepidemiology of Severe Adverse Drug Reactions. Drug Dev Res 2012. [DOI: 10.1002/ddr.21050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Karmen Stankov
- Clinical Center of Vojvodina; Medical Faculty Novi Sad; University of Novi Sad; 21000; Novi Sad; Serbia
| | - Ana Sabo
- Department of Pharmacology, Toxicology and Clinical Pharmacology; Medical Faculty Novi Sad; University of Novi Sad; 21000; Novi Sad; Serbia
| | - Momir Mikov
- Department of Pharmacology, Toxicology and Clinical Pharmacology; Medical Faculty Novi Sad; University of Novi Sad; 21000; Novi Sad; Serbia
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