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Concerns regarding the external validity of phase-III trials are common to many medical disciplines, with relevant discrepancies found between experimental and clinical samples in some diseases such as hypertension. The aim of this study was to compare the samples included in the pivotal, phase-III clinical trials of nalmefene with that of a recently conducted phase-IV trial. Baseline characteristics of the studies were compared through univariate analysis. Significant differences were found in the percentage of low-risk drinkers included. Differences were also found in the prescription and intake pattern of nalmefene, as well as in the rate of psychiatric and addictive comorbidities, which were much higher in the phase-IV study. These data suggest that in the field of alcohol use disorders there are also relevant differences between experimental and clinical samples, a fact that reinforces the need for phase-III trials to be balanced with observational, phase-IV trials.
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The incidence and clinical significance of electrolyte abnormalities (EAs) in phase I clinical trials are unknown. The objective of this study is to evaluate the incidence and severity of EAs, graded ...
A strategy of immobilizing lead in the framework of ferrite-ceramic matrix, to reduce its environmental hazard was explored in this study. The mechanisms of incorporating lead into lead ferrites (δ-p...
Early phase clinical trials evaluate the safety and efficacy of new treatments. The exclusion/inclusion criteria in these trials are usually rigorous and may exclude many patients seen in clinical pra...
U.S. minority groups have been historically underrepresented in phase III prostate cancer clinical trials despite often having higher risk disease. This study analyzes enrollment trends of major U.S. ...
There is limited research on healthy volunteers' perceptions of the risks of Phase I clinical trials. In order to contribute empirically to long-standing ethical concerns about healthy volunteers' inv...
A Multicenter, Randomized, Double-blind, Placebo-controlled, 3-parallel-group Comparison Trial to Investigate the Effect of Nalmefene on Alcohol Consumption Reduction in Patients With Alcohol Dependence (Phase 3 Trial)
The efficacy, safety, and dose-response of nalmefene hydrochloride at 10 mg and 20 mg in patients with alcohol dependence will be evaluated in a multicenter, randomized, double-blind, plac...
Nalmefene is the first drug to obtain Marketing Authorisation in France for reduction of alcohol consumption. It appears to be significantly more effective in the group of heavy drinkers, ...
The objective is to study the effectiveness of Nalmefene in decreasing alcohol intake in subjects with alcohol use disorder and comorbid BPD.
The aim of this study is to use functional Magnetic Resonance Imaging (fMRI) to measure neural reactivity to alcohol-related and emotional cues in alcohol dependent subjects following a si...
The purpose of the study is to evaluate the efficacy, safety and tolerability of nalmefene in the treatment of alcohol dependence.
Comparative studies to verify the effectiveness of diagnostic, therapeutic, or prophylactic drugs, devices, or techniques determined in phase II studies. During these trials, patients are monitored closely by physicians to identify any adverse reactions from long-term use. These studies are performed on groups of patients large enough to identify clinically significant responses and usually last about three years. This concept includes phase III studies conducted in both the U.S. and in other countries.
The interval between two successive CELL DIVISIONS during which the CHROMOSOMES are not individually distinguishable. It is composed of the G phases (G1 PHASE; G0 PHASE; G2 PHASE) and S PHASE (when DNA replication occurs).
Work that is a report of a pre-planned, usually controlled, clinical study of the safety and efficacy of diagnostic, therapeutic, or prophylactic drugs, devices, or techniques after phase II trials. A large enough group of patients is studied and closely monitored by physicians for adverse response to long-term exposure, over a period of about three years in either the United States or a foreign country.
Functionalization of exogenous substances to prepare them for conjugation in PHASE II DETOXIFICATION. Phase I enzymes include CYTOCHROME P450 enzymes and some OXIDOREDUCTASES. Excess induction of phase I over phase II detoxification leads to higher levels of FREE RADICALS that can induce CANCER and other cell damage. Induction or antagonism of phase I detoxication is the basis of a number of DRUG INTERACTIONS.
The period of the CELL CYCLE following DNA synthesis (S PHASE) and preceding M PHASE (cell division phase). The CHROMOSOMES are tetraploid in this point.
Clinical trials are a set of procedures in medical research conducted to allow safety (or more specifically, information about adverse drug reactions and adverse effects of other treatments) and efficacy data to be collected for health interventions (e.g...