Estimation of Desloratidine and Montelukast by UV

Estimation of Desloratidine and Montelukast by UVSIMULTANEOUS ESTIMATION OF DESLORATIDINE AND MONTELUKAST IN COMBINED PHARMACEUTICAL DOSAGE FORM BY UV SPECTROSCOPYETTA.NAVEEN KUMAR*, D.SIREESHA, VASUDHA BAKSHI. mouse A simple, accurate,precise and economical procedure for simultaneous estimation of Desloratidine and Montelukast in combined anovulatory drug dosage form has been developed utilizing concept of simultaneous equation method. The method is based upon determination of Desloratidine at 269nm and Montelukast at 283nm in methanol. Different analytical parameters such as linearity, precision, accuracy and ruggedness were determined according to ICH guidelines. Deslortidine and Montelukast at their various(prenominal) wavelength shows linearity in the preoccupancy scarper of 5-30 mcg/ml and 2-22mcg/ml.respectively.The method was validated statistically. The results of analysis formulation given as percentage of label form of address were found to be c.4% and 101.% for De sloratidine and Montelukast respectively. Therefore, the proposed method can be utilise for the routine analysis of two drugs simultaneously in quality control laboratories.Keywords Desloratidine, Montelukast,simultaneous estimation, methanol conceptionDesloratidine(DES) is chemically 8- chloro-6, 11-dihydro-11-(4-piperdinylidene)- 5H benzo5,6cyclohepta1,2-bpyridine.Desloratidine is a anti- histamine clinically effective drug in the treatment of Asthama. It is soluble in methanol, ethanol, water and practically insoluble in acetonitrile. Montelukast (MON),is2-1-((1R)-1-03-(E)-2-(7-chloroquinolin-2-yl)ethenylphenyl-3-2-(2-hydroxypropan-2-)phenylpropylsulfanylmethyl)cyclopropylacetic acid is a widely used as Anti-arrhythmatic and Anti-asthamatic agents. Montelukast and Desloratidine is available in combined dosage forms as film coated checks (MONDESLOR). Each tablet contains 10mg of Montelukast and 5 mg of Desloratidine. It is used for the treatment of Asthma.For this cabal deriv ative spectroscopic methods and reverse phase liquid chromatographic methods are reported. However ,there is no work reported on combination of these drugs by simultaneous equation method. Hence fast, simple, and accurate spectrophotometric method was developed by applying simultaneous equation method, for the simultaneous estimation of both the drugs in tablet dosage form by uv spectrophotometry.MATERIALS AND METHODSINSTRUMENT SPECIFICATIONS UV Spectrophotometer, Shimadzu, model 1800CHEMICALS AND REAGENTS methanol obtained from local market, manufacturedPure Deslortadine and Montelukast were obtained as gift sample from Gujarat organics Ltd,GujaratThe tablet dosage form MONDESLOR( claim 10mg Montelukast and 5mg Desloratidine) was procured from local market.PREPARATION OF STANDARD STOCK SOLUTIONSThe 10 mg of bill Montelukast and Desloratidinewere weighed accurately and transferred into coulomb ml volumetric flaskfuls seperately. They were turn in methanol and diluted up to the m ark by using the solvent methanol to obtain a final slow-wittedness of 100g/ml. The resulting solutions were used as a working regulation solutions.The aliquot portion of stock solutions of Montelukast and Desloratidine were diluted approximately with methanol to obtain concentration of 10 mcg/ml of each drugs.These solutions were scanned in the range of 200-400 nm in 1cm cell against blank .From the overlain spectra the wavelength selected for the estimation are 269 nm and 283nm for montelukast and desloratidine respectively.PREPARATION OF SAMPLE SOLUTIONSFor analysis of commercialized formulations 20 tablets (MONDESLOR) each cantaining 10mg of montelukast and 5mg of desloratidine were accurately weighed and the average weight was calculated and finely powdered.A quantity equivalent to 10mg of montelukast dissolved in methanol in 100ml volumetric flask and to it 5mg of desloratidine was added(standard addition method). sonicated to dissolve it completely and volume was made to t he mark with methanol .mixed well and filtered through 0.45m filter to get the final concentration of 100g/ml. finally 10mcg/ml working concentration of each desloratidine and montelukast was prepared.This solution was scanned over the range of 200-400 nm ,using two sampling wavelengths 269nm and 283nm determined the concentration of these drugs in tablet formulationUsing the formula.CDES = A2ay1-A1ay2/ax2 ay1-ax1ay2CMON = A1ay2 A2ax1/ax2ay1-ax1ay2A1 = absorbance of formulation at 269nm.A2 = absorbance of formulation at 283 nm.ax1 = absorptivity of Desloratidine at 269 nm.ax2 = absorptivity of Desloratidine at 283 nm.ay1 = absorptivity of Montelukast at 269 nm.ay2 = absorptivity of Montelukast at 283 nm.CDES = concentration of Desloratidine.CMON = concentration of Montelukast.VALIDATION OF THE METHOD1) LINEARITY Standard stock solution of Montelukast and Desloratidine 10 mg of montelukast and desloratidine were accurately weighed and transferred into a clean and dry 100 ml v olumetric flasks, dissolved with sufficient volume of methanol seperately .The volume was then made up to 100 ml with methanol to obtain the concentration of 100 g/ml. Working standard solution The aliquot portion of the stock solution was diluted approximately with methanol to get a concentration of 2-22 mcg/ml of montelukast and 5-30mcg/ml of desloratidine. Serial dilutions of concentration range were prepared from the working standard solution. These dilutions were scanned at the detection wavelength of 269 nm and 283nm using methanol as blank. The regression equation, Y- intercept and correlation coefficient were calculated. The linearity was thus determined and the concentration range was selected.2) LIMIT OF DETECTION AND LIMIT OF QUANTITATIONThe LOD and LOQ were separately determined based on calibration curve. The residual standard deviation of a regression line or the standard deviation of y- intercepts of regression lines were used to calculate the LOD and LOQ.I. Formula f or LOD (g/ml)LOD = 3.3 x SD / SWhere,SD = The standard deviation of the responseS = The slope of the calibration curve ( crocked)II. Formula for LOQ (g/ml)LOQ = 10 x SD / SWhere,SD = The standard deviation of the responseS = The slope of the calibration curve (mean)3) ACCURACYThe accuracy of the method was ascertained by carrying out recovery studies using standard addition method. The recovery studies are performed to determine if there was any positive or negative interference from excipients present in the formulation. The percentage recovery results revealed that the set were near to 100%, which indicates that the proposed method is accurate as the results are within the official limits. It also reveals that the commonly used excipients and additives in the formulation were not interfere with the proposed method(Table no4)4) PRECISIONPrecision was found by carrying out the analysis of the standard drugs at two different concentrations in the linearity range of drugs for three times on the same day. Each concentration was applied in duplicate and % RSD was calculated (Table no 5)RESULTS AND DISCUSSIONMontelukast and Desloratidine showed maximum absorbance in Methanol at 269 and 283 nm.The proposed method for simultaneous estimation of both the drugs was validated as per the ICH guidelines The linearity was observed in the concentration range of 2-22 mcg/ml for montelukast and 5-50mcg/ml for Desloratidine with regression co-efficient of 0.998 and 0.998.Amount of drugs estimated by the proposed method was in good agreement with the label claim.The accuracy of the method was assessed by recovery experiments . Recovery was close to 100% for both the drugs.CONCLUSIONThe present study comprises a UV spectroscopic method of analysis for the simultaneous estimation of montelukast and Desloratidine in tablet dosage form.From the study of ecesis parameters,itwas observed that the method is specific,accurate,precise,reproducible .The proposed method could be applie d to routine analysis in quality control laboratories.Table No.1 Calibration data of deslortadine.Concentration (g/ml)Absorbance at 269nmAbsorbance at 283nm50.1870.111100.3860.212150.5590.309200.7720.423250.9600.520301.120.650Table No.2 calibration data of montelukast.Concentration (g/ml)Absorbance at 269nmAbsorbance at 283nm20.0750.08860.2040.248100.3470.418140.5120.618180.6750.817220.7980.971Table No3 Results of analysis of tablet formulation.BRANDLABEL CLAIM(mg/tablet)%LABELCLAIMMondeslorMontelukast(10mg) 100.4%Deslortadine(5mg) 101.%Table no4 Results of recovery studies medicateAmount added (mcg/ml)Amount recovered (mcg/ml)% RecoveryDES80( 8)7.9699.5100(10)9.898120(12)12.2101.6MONT80(8)8.1101.2100(10)9.999120(12)11.898.5Table No5 Results of precision studies.DrugConcentration(g/ml)wavelengthAbsorbance%* RSDDES10269nm0.3820.3850.3870.6510283nm0.2140.2180.2160.9215269nm0.5600.5650.5690.7915283nm0.3030.3080.3040.86DrugConcentration(g/ml)wavelengthAbsorbance%* RSDMON10283nm0.4130.41 50.4180.6010269nm0.3480.3460.3490.4314269nm0.5100.5090.5120.2914283nm0.6130.6160.6180.40* mean of three observations Fig-1 Selection of wavelengthFig-2 Calibration curve of montelukastFig 3calibration curve of deslortadineREFERENCESFDA Guidance for Industry. 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