British journal of clinical pharmacology
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Br J Clin Pharmacol · Jan 2011
Randomized Controlled Trial Comparative StudyComparative evaluation of atracurium dosed on ideal body weight vs. total body weight in morbidly obese patients.
Different conflicting reports have been published for the use of atracurium in morbidly obese patients. Dosing of atracurium based on lean body mass, total body weight, and total body weight with a dose reduction for every 10 kg more than 70 kg have been proposed. ⋯ In morbid obesity (112-260 kg), atracurium 0.5 mg kg(-1) ideal body weight results in a predictable profile of muscle relaxation allowing for adequate intubation conditions and recovery of muscle strength to a TOF ratio >90% within 60 min with lack of need for antagonism. A dose-dependent prolongation of action is shown when dosing is based on total body weight.
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Br J Clin Pharmacol · Jan 2011
Randomized Controlled TrialImpact of a focussed teaching programme on practical prescribing skills among final year medical students.
Medication errors, and particularly prescribing errors, are common in UK hospitals. Junior doctors make the majority of prescribing errors. Deficiencies in prescribing education and training have been closely linked to the high frequency of medication errors. ⋯ Medical students make significant errors in prescribing. Teaching improves ability and confidence but is insufficient alone in eradicating errors.
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Br J Clin Pharmacol · Jan 2011
The use of antidepressants and the risk of haemorrhagic stroke: a nested case control study.
Selective serotonin re-uptake inhibitors (SSRI) are associated with an increased risk of bleeding disorders at a number of sites. It is currently unclear whether they increase the risk of haemorrhagic stroke, with conflicting results reported. ⋯ We found no evidence that SSRIs are associated with an increased risk of haemorrhagic stroke, regardless of prior history of cerebrovascular events.
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Br J Clin Pharmacol · Jan 2011
Tobramycin disposition in ICU patients receiving a once daily regimen: population approach and dosage simulations.
WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT? It is well known that tobramycin given as an once daily dose according to the usual recommendations needs therapeutic drug monitoring by measurement of peak and trough concentrations. In the literature, there are only few published studies on the population pharmacokinetics of once daily tobramycin in critically ill patients. Glomerular filtration rate and bodyweight were identified as covariates contributing to the inter-individual variability in the disposition of aminoglycosides. The study, by Peris-Marti et al. [24], only evaluated the pharmacodynamic effectiveness of a 4 mg kg(-1) dose of tobramycin given once daily in critically ill patients. The authors concluded with a simulation showing that for a theoretical MIC of 1 or 2 mg l(-1) , a 7 mg kg(-1) dose was required. ⋯ Even after taking into account COCK and height, for strains with an MIC ≤ 1 mg l(-1) , MCS doses evidenced that peak and AUC pharmacodynamic targets could not be reached simultaneously in more than 45% of the ICU patient population. Combination therapy in addition to drug monitoring are required to manage efficacy and toxicity.
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Br J Clin Pharmacol · Jan 2011
Understanding lactic acidosis in paracetamol (acetaminophen) poisoning.
Paracetamol (acetaminophen) is one of the most commonly taken drugs in overdose in many areas of the world, and the most common cause of acute liver failure in both the UK and USA. Paracetamol poisoning can result in lactic acidosis in two different scenarios. First, early in the course of poisoning and before the onset of hepatotoxicity in patients with massive ingestion; a lactic acidosis is usually associated with coma. ⋯ In these patients lactate is elevated primarily because of reduced hepatic clearance, but in shocked patients there may also be a contribution of peripheral anaerobic respiration because of tissue hypoperfusion. In patients admitted to a liver unit with paracetamol hepatotoxicity, the post-resuscitation arterial lactate concentration has been shown to be a strong predictor of mortality, and is included in the modified King's College criteria for consideration of liver transplantation. We would therefore recommend that post-resuscitation lactate is measured in all patients with a severe paracetamol overdose resulting in either reduced conscious level or hepatic failure.