|Systematic (IUPAC) name|
|Legal status||Prescription Only (S4) (AU) POM|
|Protein binding||> 99% (active metabolite)|
|Metabolism||Hepatic, to active metabolite 6-methoxy-2-naphthylacetic acid; 6-MNA|
|Half-life||23 hours (active metabolite)|
|Mol. mass||228.29 g/mol|
| (what is this?)
Nabumetone is a non-steroidal anti-inflammatory drug1 (NSAID), the only 1-naphthaleneacetic acid derivative. Nabumetone has been developed by Beecham. It is available under numerous brand names, such as Relafen, Relifex, and Gambaran.
Nabumetone is a non acidic NSAID that is rapidly metabolized in the liver to a major active metabolite, 6-methoxy-2-naphthyl acetic acid. As found with previous NSAIDs, nabumetone's active metabolite inhibits the cyclooxygenase enzyme and preferentially blocks COX-2 activity (which is indirectly responsible for the production of inflammation and pain during arthritis). The active metabolite of nabumetone is felt to be the compound primarily responsible for therapeutic effect. Comparatively, the parent drug is a poor inhibitor of COX-2 byproducts, particularly prostaglandins. It may be less nephrotoxic than indomethacin.2
Nabumetone belongs to a new class of NSAID with a low potential for causing gastrointestinal mucosal irritancy and inhibition of platelet function,3 little effect on renal prostaglandin secretion and less of an association with heart failure than other traditional drugs of the class.4 Effects of nabumetone on blood pressure control in hypertensive patients on ACE inhibitors is also good—equivalent to Paracetamol.5
It is used to treat pain or inflammation caused by arthritis. Nabumetone works by reducing the effects of hormones that cause pain and inflammation.
It has been shown to have a slightly lower risk of gastrointestinal side effects than most other non-selective NSAIDs since it is a non-acidic prodrug which is then metabolized to its active 6MNA (6-methoxy-2-naphthylacetic acid) form.
Assay of Nabumetone6
There are few papers published reporting analytical methods 7 for nabumetone. Two of them employed HPLC with UV-detection.89 One HPLC method using direct injection on restricted access media columns.10 Flow injection analysis (FIA) with UV-detection was also reported for the determination of nabumetone in pharmaceutical preparations.11 Methods using HPLC with fluorescence detection 12131415 were reported. M. Nobilis et al. carried out biotransformation and disposition studies in humans and minipigs using HPLC with UV, fluorescence and mass spectrometric detection. The interactions with gamma-cyclodextrin were also studied by fluorescence measurements13. Assay methods employed HPLC using UV detection,16 photodiode array (PDA) detector1718 and mass spectrometric detection for the determination of nabumetone and its metabolites. Murillo Pulgarín et al.192021 reported three analytical methods using different techniques along with phosphorescence. Liquid chromatography methods using different techniques of mass spectrometry were also reported.222324 The electrochemical behavior of nabumetone by a voltammetric technique 25 and a novel colorimetric method based on chemical derivatization 26 were also published. P. K. Sahu et al.27 has reported a HPLC method for simultaneous estimation of Nabumetone and Paracetamol in combined dosage form.
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- Gonzalo-Garijo MA, Cordobés-Duran C, Lamilla-Yerga AM, Moreno-Gastón I (2007). "Severe immediate reaction to nabumetone". Journal of Investigational Allergology and Clinical Immunology : official organ of the International Association of Asthmology (INTERASMA) and Sociedad Latinoamericana de Alergia e Inmunología 17 (4): 274–6. PMID 17694703.
- Olsen N V, Jensen N G, Hansen J M, Christensen N J, Fogh-Andersen N and Kanstrup I L, Clin Sci.,1999, 97, 457- 465.
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- Prafulla Kumar Sahu and M. Mathrusri Annapurna, Analytical method development by liquid chromatography, LAP Lambert Academic Publisher, Germany, 2011 ISBN 3844328696.
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- Al-Rawashdeh A F Nathir, J Inclusion Phenomena and Macrocyclic Chem. 2005, 51(1-2), 27-32.
- Prafulla Kumar Sahu and M. Mathrusri Annapurna, Analysis of Nabumetone in Bulk and Tablet Formulation by a New and Validated Reverse Phase High Performance Liquid Chromatography. E-Journal of Chemistry, 2009, 6(S1), S59- S64.
- Rao R Nageswara, Meena S, Nagaraju D and Rao A Raghu Ram, Biomed Chromatogr., 2004, 19, 362-368.
- Nobilis M, Holcapek M, Kolárová L, Kopecký J, Kunes M, Svoboda Z and Kvetina J, J Chromatogr. A, 2004, 1031, 229-236.
- Pulgarín J A Murillo, Molina A Alañón and Pardo M T Alañón, Analytica Chimica Acta, 2005, 528, 77-82.
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- Pulgarín Jose A Murillo, Molina Aurelia Alañón and Robles Ignacio Sánchez-Ferrer, Analytica Chimica Acta. 2005, 554, 37-42.
- Patel Bhavin N, Sharma Naveen, Sanyal Mallika, Prasad Arpana and Shrivastav Pranav S, Biomed Chromatogr., 2008, 22, 1213-1224.
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- Prafulla Kumar Sahu, M. Mathrusri Annapurna and Dillip Kumar Sahoo, A Simple and Sensitive HPLC Method for Simultaneous Analysis of Nabumetone and Paracetamol in Pharmaceutical Formulations. E-Journal of Chemistry, 2011, 8(S1), S41- S46.
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