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Biomedical subjects

Vincent Pradel

Publications and source records attributed to Vincent Pradel.

10 recordsLinked to original sources
PubMed2007

Use of albumin in three French university hospitals: is prescription monitoring still useful in 2004?

PURPOSE: Use of albumin (indications and quantities involved) has not been assessed in France since major changes occurred after the publication of Cochrane group meta-analysis. The objectives of this study were to measure the repartition of albumin indications in three French university hospitals in 2004 and to assess the feasibility and usefulness to implement a prescription-monitoring program. METHODS: Exhaustive record of albumin prescription during 2 months in three French university hospitals of Marseille. Inclusion of all patients with a first prescription of albumin between 15 March 2004 and 15 May 2004. Indication, formulation and quantity prescribed were recorded for each prescription. RESULTS: One hundred and eighty-seven patients received a total of 426 prescriptions for a total quantity of 21 094 g of albumin during the study. The first indications were hypoalbuminemia (33% of total quantity), plasmapheresis (30.2%) and ascites or hepatorenal syndrome (13.7%). Fifty per cent of total quantity was used by 14 patients (7.5% of included patients). CONCLUSIONS: Most of albumin consumption in our study is concentrated on recognized indications or indications without alternative to albumin. The different levels of analysis (number of patient treated, number of prescription and quantities used) must be taken into account when analyzing medications such as albumin. Only a marginal proportion of consumption is expected to be saved with close monitoring of indications.

Adolescent↗
PubMed2006

Anxiolytics, hypnotics, and antidepressants dispensed to adolescents in a French region in 2002.

PURPOSE: This study proposes to complete declarative studies by describing the prescriptions of anxiolytics, hypnotics, and antidepressants dispensed to adolescents in a French region in 2002. METHODS: This cross-sectional study analyzes all the hypnotic, anxiolytic, and antidepressant prescriptions (ATC codes beginning with N05B, N05C, and N06A, respectively) sent by adolescents (aged 13-17 years) to the French Health Insurance system of the study region for reimbursement during one year (2002). It was performed in a southern France area with 120,908 adolescents covered by this insurance scheme. Adverse drug reactions (ADRs) recorded in the Pharmacovigilance database were also studied. RESULTS: Three thousand two hundred and eighty-six adolescents (2.7% of adolescent population) had at least one prescription of the studied drugs. This prevalence increased with age and female sex, leading to a maximum of 6.3% for the 17-year-old girls. Two thousand four hundred and thirty-one of adolescents were dispensed anxiolytics, 935 antidepressants, and 548 hypnotics. The most dispensed drugs were zolpidem, zopiclone, and niaprazine for hypnotics; hydroxyzine, etifoxine, and bromazepam for anxiolytics; and paroxetine, sertraline, and fluoxetine for antidepressants. Zolpidem, hydroxyzine, and paroxetine accounted, respectively, for 82.9%, 57.1%, and 59.8% of the prescriptions. 75.5% of hypnotics users had only one prescription, 77.4% for anxiolytics, and 57.4% for antidepressants. Three ADRs were reported. CONCLUSIONS: This study confirms the large use of psychotropics in French adolescents and the influence of age and sex. Also, the results underline treatment for most adolescents is short, which may be beneficial for hypnotics and anxiolytics but not for antidepressants.

Adolescent↗
PubMed2004

Assessment of doctor-shopping for high dosage buprenorphine maintenance treatment in a French region: development of a new method for prescription database.

PURPOSE: To assess the extent of doctor-shopping for buprenorphine maintenance therapy in a French region with a specific indicator. METHODS: Use of a quasi-exhaustive prescription database in a French region (information system of the French General Health Insurance Scheme). Extraction of all buprenorphine prescriptions between September 1999 and December 2000. Definition and calculation of three quantities for each patient: delivered, prescribed and doctor-shopping quantity. The calculation of these three quantities is done by an automated and reproducible method determining the overlaps in prescription periods of different physicians for a given patient. Calculation of the corresponding daily dose was done for each quantity. RESULTS: A total of 64 326 prescriptions of buprenorphine by 1313 physicians to 3259 patients were extracted. Quantities and doses were calculated for 2587 patients. The total doctor-shopping quantity represented 18.6% of the delivered quantity. Doctor-shopping involved a minority of patients and was highly concentrated: 87 patients with doctor-shopping doses superior to 16 mg/day were responsible for 45.4% of the total doctor-shopping quantity. CONCLUSIONS: Doctor-shopping appears to be an important problem for buprenorphine maintenance treatment in France but may be resolved by regulatory interventions. The use of adequate indicators on prescription databases may help to limit the effects of such interventions on legitimate care. The method presented here may be used with slight adaptations for other medications to assess their abuse potential.

Buprenorphine↗
PubMed2003

[High-dose buprenorphine prescription in southern France from 1999 to 2001].

Several reports have focused on prescription of high-dose buprenorphine using data electronically transmitted to the French health reimbursement system. This study deals with high-dose buprenorphine prescriptions in the Bouches-du-Rhone region between 1999 and 2001. We determined the number of maintained patients followed by practitioners (either short- or long-term care), the doses administered, and the associated prescription of psychotropic treatments. The number of general practitioners involved in 84% of the prescriptions of high-dose buprenorphine grew with a high turnover (20%). More than 25% of the general practitioners in the region prescribed this drug, but only 38% of them were involved in long-term follow-up of more than one maintained patient. The number of maintained patients and the mean daily treatment dose delivered (13.4 mg/d during 2001) increased. The associated prescriptions of benzodiazepines concerned 47% of the patients during 2001 (on the rise), but the associated prescription of flunitrazepam tended to decrease (29% of the subjects during 2001 versus 32% during 2000). This study shows a tendency for deviant behaviors to increase, constituting a public health concern.

Adult↗
PubMedDate not supplied

[Misuse of trihexyphenidyl (Artane, Parkinane): recent trends].

Recent observations suggest the existence of trihexyphenidyl abuse linked to its hallucinogenic and euphoric effects. In order to determine the importance of this practice and the characteristics of those involved, a study based on data from the Provence-Alpes-Côte-d'Azur and the Corsica health reimbursement system was carried out. Individuals from these regions affiliated to the French health reimbursement system who had a prescription for trihexyphenidyl (Artane, Parkinane) reimbursed between January 1, 2001, and February 15, 2001, were selected. The delivery of prescriptions was monitored over a 9-month period. In total, 3028 subjects were selected. A subgroup comprising 2.1% of subjects with deviant behaviour was identified by factorial analysis and compared with the subgroup without deviant behaviour. The subjects with deviant behaviour were young and mostly male. The dosage of trihexyphenidyl was higher in these subjects (28 mg/day versus 7 mg/day) and a greater proportion used benzodiazepine and high-dose buprenorphine compared with those without deviant behaviour. The number of prescriptions delivered was higher (23.0 versus 7.7) as well the number of different physicians (4.9 versus 1.5) and pharmacies (5.0 versus 1.3) for those subjects with deviant behaviour. This study confirms the abuse and dependence potential associated with trihexyphenidyl use and the need to increase the supervision of this drug.

Adult↗
PubMedDate not supplied

[Drug-induced parkinson syndromes].

Parkinsonism is defined by the association of akinesia with one of the following symptoms: extrapyramidal rigidity, tremor at rest, or postural instability. A drug-induced aetiology must always be suspected when parkinsonian symptoms appear, or increase in a patient receiving drug treatment. Indeed drug-induced is the more frequent aetiology of secondary parkinsonism. The main treatments involved are antipsychotic and other neuroleptic drugs (accounting for up to two-thirds of drug-induced parkinsonism), and calcium-channel entry blockers. The risk associated with antipsychotics is often dose dependent and related to dopamine D2 striatal receptor occupancy induced by the antipsychotic drug. This risk is inferior for the second generation antipsychotics. The other treatments more rarely involved are antidepressants (tricyclic and selective serotonin reuptake inhibitors), lithium, valproic acid, and others. The main criterium for imputability is chronological, regression of symptoms being observed in 40-74% of cases, after a mean delay of 3 months from cessation of treatment. However, 15% of cases persist after drug withdrawal, leading to a diagnosis of underlying idiopathic Parkinson's disease.

Anticonvulsants↗
PubMedDate not supplied

[Use of the health insurance database by the centres for evaluation and information on pharmacodependance: examples, interests and future prospects].

In France, the observation and evaluation of drug abuse and dependence associated with pychoactive medications are the responsibility of the National Commission for Narcotics and Psychotropic Drugs. In order to assist this commission, several centres for evaluation and information on pharmacodependence (CEIP) were created throughout in France. Recently, in order to complete their epidemiological tools, several centres have developed another pharmacoepidemiological approach using data for refunded prescriptions obtained from the local and regional French Health Insurance database. This article underlines the potential contribution of the Health Insurance database to improving knowledge of drug use in the real-life conditions based on studies performed by the CEIP. Several examples are given showing the extent of the possibilities (population-based studies, cohort studies, development of misuse indicators). In spite of their limitations (e.g. the difference between consumption and delivery), these examples confirm that these database may be a novel tool for CEIP to assess a potential abuse of a medication.

Anti-Anxiety Agents↗
PubMedDate not supplied

[Benzodiazepine and hiccup: three case reports].

Hiccup is a sudden contraction of the inspiratory muscles, followed by an abrupt closure of the glottis, thus producing a characteristic sound. In the literature, some drugs have been reported to induce hiccup. We discuss three case reports after administration of benzodiazepine to healthy young subjects during two clinical trials. In the first study (a bioequivalence trial of two forms of lormetazepam, tablets and oral solution), 12 subjects were included in an open controlled crossover study with two periods separated by a washout of 7 days. Two subjects presented with hiccup after administration of lormetazepam (2mg oral solution). The symptom resolved in 10 and 40 minutes, respectively. In one subject, rechallenge with a tablet of lormetazepam was positive. The aim of the second study was to assess the effect of sleep deprivation and lorazepam-induced sedation on saccadic eye movements in 12 healthy subjects. Hiccup occurred in one subject 3h 15 after administration of a single oral dose of lorazepam (2mg) and resolved in 45 minutes. All cases were evaluated according to the French imputation method. These observations are discussed with regard to the drug classes mentioned most frequently in the literature.

Adult↗
PubMedDate not supplied

[Misuse of clonazepam (Rivotril): recent trends].

Recent observations suggest the existence of clonazepam abuse. In order to determine the importance of this practice and the characteristics of these consumers, a study has been carried out, based on data from the Provence-Alpes-Côte-d'Azur and Corsica health reimbursement system. Individuals from these regions affiliated to the French health reimbursement system, who have had a prescription of clonazepam reimbursed between January 1, 2001 and February 15, 2001, have been selected. The deliveries have been monitored over a 9 month-period. 9381 subjects have been selected. A sub-group of 1.5 per cent subjects with a deviant behaviour has been identified by factorial analysis and has been compared to the sub-group without deviant behaviour. The subjects with deviant behaviour are younger and mostly male. The dosage of clonazepam is higher (10.8 mg per day versus 2.1 mg per day) with a significantly higher proportion of benzodiazepine and high-dose buprenorphine. The number of deliveries is higher (19.4 versus 5.9) as well as the number of different physicians (4.5 versus 1.5) and pharmacies (5.9 versus 1.3). This study provides some arguments in favor of the potential of abuse and dependence of clonazepam and the necessity to reinforce its monitoring. This information requires to be relayed to health professionals.

Clonazepam↗