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R. Siva Kumar , P. Senthil Kumaran , P. Kumar Nallasivan , W. D. Sam Solomon , R. Venkatnarayanan

Abstract

A new simple, accurate, precise and reproducible Reverse Phase-High Performance Liquid Chromatographic method has been developed for the simultaneous estimation of Aceclofenac and Tizanidine in tablet dosage forms using C₁₈ column (Ineretsil, 250 x 4.6 mm, 5 μm) in isocratic mode. The mobile phase consisted of acetonitrile, methanol and 20 mM phosphate buffer adjusted to pH 3.5 in ratio of (40:30:30 v/v) with Ultraviolet-Visible detection at 230 nm. The method was linear over the concentration range for aceclofenac120-280 μg/ml and for tizanidine 2-40 μg/ml. The recoveries of Tizanidine and Aceclofenac were found to be in the range of 99.45-100.61% and 99.56-101.32% respectively. The validation of method was carried out using International Conference on Harmonization-guidelines. The described High Performance Liquid Chromatographic method was successfully employed for the analysis of pharmaceutical formulations containing combined dosage form.

Keywords

Simultaneous Estimation, RP - HPLC, Aceclofenac, Tizanidine, ICH Guidelines.

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N. Santhi ¹, S. S. Rajendran ¹, P. Kumar Nallasivan ¹, W. D. Sam Solomon ¹, R. Venkata Narayanan ¹

Affiliations
1 RVS College of Pharmaceutical Sciences, Sulur, Coimbatore, IN

Abstract

Two simple, rapid, accurate and price spectrophotometric methods have been developed for simultaneous eatimation of cefixime and ofloxacin in bulk and in tablet dosage form. Method A involves simultaneous equations at 290.4 nm ((λmax of Cefixime) and 297.4nm (λmax of Ofloxacin). Method B involves Absorbance ratio method at 282.0 nm (iso-absorptive point) and 297.4 nm (λmax of Ofloxacin) using ethanol as a solvent.The linearity was observed in the concentration range of 5-25 μg/ml for Cefixime and 2-10 μg/ml for Ofloxacin.The results of analysis have been validated statically and by recover studies and were found satisfactory.

Keywords

Cefixime, Ofloxacin, Simultaneous Equations, Absorbance Ratio Method.

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S. S. Rajendran ¹, N. Santhi ¹, P. Kumar Nallasivan ¹, W. D. Sam Solomon ¹, R. Venkata Narayanan ¹

Affiliations
1 RVS College of Pharmaceutical Sciences, Sulur, Coimbatore, IN

Abstract

Two simple, rapid, accurate and price spectrophotometric methods have been developed for simultaneous estimation of cefixime and ofloxacin in bulk and in tablet dosage form. Method A involves simultaneous equations at 290.4 nm (λmax of Cefixime) and 297.4nm (λmax of Ofloxacin). Method B involves Absorbance ratio method at 282.0 nm (iso-absorptive point) and 297.4 nm (λmax of Ofloxacin) using ethanol as a solvent. The linearity was observed in the concentration range of 5-25 μg/ml for Cefixime and 2-10 μg/ml for Ofloxacin. The results of analysis have been validated statically and by recover studies and were found satisfactory.

Keywords

Cefixime, Ofloxacin, Simultaneous Equations, Absorbance Ratio Method.

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Rajesh Shukla ¹, R. Sivakumar ¹, P. R. Vijayanand ¹, P. Kumar Nallasivan ¹, R. Venkatnarayanan ¹

Affiliations
1 Dept. of Pharmaceutical Analysis, RVS College of Pharmaceutical Sciences, Sulur, Coimbatore, Tamilnadu, IN

Abstract

This work is concerned with application of simple, accurate, precise and highly selective reverse phase high performance liquid chromatographic (RP-HPLC) method for simultaneous estimation of Tramadol HCl and Paracetamol in combined dosage form. Chromatographic separation was achieved isocratically at room temperature on phenomenex C18 column (250×4.6 mm) with a mobile phase composed of 5% Tri-fluoroaceticacid in water:Acetonitrile:Methanol in the ratio of 70:20:10% v/v/v at flow rate of 1.0 ml/min. Detection is carried out using a UV detector at 254 nm. The retention time of Tramadol HCl and Paracetamol was found to be 3.890±0.5 min and 1.990±0.5 min respectively. The method was found to be linear in the range of 0.1-10 μg/ml with mean recovery of 98.96% for Tramadol HCl and 99.11% for Paracetamol. The correlation coefficients for all components are close to 1. The developed method was validated according to ICH guidelines and values of accuracy, precision and other statistical analysis were found to be in good accordance with the prescribed values. Thus the proposed method was successfully applied for simultaneous determination of Tramadol HCl and Paracetamol in routine analysis.

Keywords

Tramadol HCl, Paracetamol, RP-HPLC.

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R. Siva Kumar ¹, Shaik Nafeez Basha ¹, P. Kumar Nallasivan ¹, W. D. Sam Solomon ¹, R. Venkatnarayanan ¹

Affiliations
1 Dept. of Pharmaceutical Chemistry, RVS College of Pharmaceutical Sciences, Sulur, Coimbatore-641402, (T.N.), IN

Abstract

The Protein-Ligand interaction plays a significant role in structural based drug designing. The highly pathogenic influenza A virus subtype H5N1 virus is an emerging avian influenza virus that has been causing global concern as a potential pandemic threat. It is often referred to simply as "bird flu" or "avian influenza". In our research work we have taken influenza A virus H5N1 receptor. The receptor was docked to the commercially available drugs zanamivir and oseltamivir and the energy value obtained are as follows; zanamivir (-231.74) and oseltamivir (-243.74) using the HEX docking software. We tried to improve the binding efficiency and steric compatibility of zanamivir against N5N1 receptor. Several modifications were made to the probable functional groups which were interacting with the receptor molecule. Analogs of this drug molecule were prepared using ACD ChemSketch and docked using HeX docking software. Zanamivir analog 3 and oseltamivir analog 5 were detected with significant energy values and probable lead molecules. The Modified drugs was sketched using Chemsketch were found to be better than the conventional drugs available. Further from this work we can improve the steric compatibility and then ADME properties of the Analogs can be analyzed using Inslico ADME tools available.

Keywords

Bird Flu, Chemsketch, Docking, Hex, Rasmol.

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R. Siva Kumar ¹, P. Kumar Nallasivan ¹, S. Saravanakumar ¹, C. S. Kandasamy ¹, R. Venkatnarayanan ¹

Affiliations
1 Dept. of Pharmaceutical Analysis, RVS College of Pharmaceutical Sciences, Sulur, Coimbatore-641402, Tamilnadu, IN

Abstract

Reverse Phase HPLC method for the determination of nitazoxanide and ofloxacin in bulk and tablet formulations. The determination was carried out by using Phenomenex C18 column with 0.24% sodium lauryl sulphate:acetonitrile:acetic acid (pH-4.0) (58:40:02) as the mobile phase. The flow rate was 1.5 ml/min and the eluent was monitored at 295 nm. The Retention time of nitazoxanide and ofloxacin were 2.2 and 5.4 respectively. Linearity for the nitazoxanide and ofloxacin were found in the range of 400-600 μg/ml and 160-240 μg/ml respectively. The method was reproducible, with good resolution between nitazoxanide and ofloxacin and can be use for routine analysis.

Keywords

RP-HPLC, Nitazoxanide and Ofloxacin.

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