MRSA drug dosage calculations found to be inaccurate for children over 10

The emergence of MRSA (Staphylococcus aureus), dubbed a 'superbug' due to its resistance to many antibiotic drugs, has resulted in the glycopeptide antibiotic Vancomycin being commonly prescribed for patients in hospital.

However, MRSA's resistance to drugs has led to concerns of a 'creeping minimum' in the concentration of the dosage required to treat infection. In , nomograms are used to calculate the correct dosage of Vancomycin based on a patient's weight and creatinine levels.

While these adult nomograms are widely thought to be suitable for teenagers, pharmacological differences between teens and young adults remain poorly understood.

New research, published in the Journal of Clinical Pharmacology, explores the accuracy of adult nomograms in children over ten. The results of 120 patients from a children's' hospital in Vanderbilt, Nashville, revealed that Vancomycin nomograms from adults were not accurate in predicting appropriate dosing levels in .

"Based on the variability of pharmacokinetic parameters and drug clearance, the two Vancomycin nomograms developed to predict therapeutic Vancomycin concentrations in healthy adults did not accurately estimate dosage regimens in older children regardless of weight or age, and therefore should not be used to aid empiric dosing," said Dr. Jessica Gillon. "Further prospective studies are warranted for teens between 10 and 18 years of age to determine the most appropriate Vancomycin dosing to maximize drug efficacy and reduce the risk of Vancomycin induced renal toxicity."

More information: Jessica E. Gillon, James E. Cassat, M. Cecilia Di Pentima, 'Validation of two vancomycin nomograms in patients 10 years of age and older' The Journal of Clinical Pharmacology, Wiley, DOI: 10.1002/jcph.173

Related Stories

Less commonly prescribed antibiotic may be better

date Aug 16, 2012

The antibiotic most commonly prescribed to treat bloodstream infections in dialysis patients may not always be the best choice, according to a study appearing in an upcoming issue of the Journal of the American Society of ...

Vibativ approved for certain bacterial pneumonia

date Jun 24, 2013

(HealthDay)—The antibiotic Vibativ (telavancin) has been approved by the U.S. Food and Drug Administration to treat pneumonia caused by Staphylococcus aureus bacteria when other treatments aren't suitable.

Recommended for you

Teva to lift bid for Mylan: report

date 16 hours ago

Israeli pharmaceutical giant Teva plans to increase its bid for rival Mylan and could announce the move as soon as this week, according to a US media report Monday.

Vaccine for West Nile Virus enters human clinical trials

date 20 hours ago

A clinical trial of a new investigational vaccine designed to protect against West Nile Virus infection will be sponsored by the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes ...

FDA clears drug for leading form of cystic fibrosis

date Jul 02, 2015

Federal health officials have approved a new combination drug for the most common form of cystic fibrosis, the debilitating inherited disease that causes internal mucus buildup, lung infections and early death. But it will ...

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.