Emulgels have emerged as a promising drug delivery system for the delivery of hydrophobic drugs. The objective of the study was to prepare emulgel of mefenamic acid, a NSAID, using Carbapol 940 as a gelling agent. Mentha oil and clove oil were used as penetration enhancers. The emulsion was prepared and it was incorporated in gel base. The formulations were evaluated for rheological studies, spreading coefficient studies, bioadhesion strength, skin irritation studies, in vitro release, ex vivo release studies, anti-inflammatory activity and analgesic activity. Formulation F2 and F4 showed comparable analgesic and anti-inflammatory activity when they compared with marketed diclofenac sodium gel. So, it can be concluded that topical emulgel of mefenamic acid posses an effective anti-inflammatory and analgesic activity.
A simple, economic, accurate reverse phase isocratic HPLC method was developed for the quantitation of anastrozole in tablet dosage form. The quantification was carried out using Gracesmart RP18, 5 µ (100 mm x 4.6 mm) with UV detected at 215 nm. The elution was achieved isocratically with a mobile phase comprising a mixture of buffer (pH 6.0) and acetonitrile (1:1, v/v). The flow rate was 1.0 mL/min The procedure was validated as per ICH rules for accuracy, precision, detection limit, linearity, reproducibility and quantitation limit. The linearity concentration range was 10-20 mcg/mL with the correlation coefficient of 0.9935. The percentage recovery for Anastrozole was found to be 97.31±2.2%. Limit of detection and limit of quantitation values were found to be 0.351 mcg/mL and 1.053 mcg/mL. The method has been successfully used to analyze commercial solid dosage containing 1mg of anastrozole with good recoveries and proved to be robust.
Objective: Our main objective is to develop an accurate and precise RP-HPLC method for the determination of Eprosartan Mesylate and its impurities. Methods: A Develosil ODS UG-5; (150 × 4.6) mm; 5 µm column was used for the Separation of drugs by a mobile phase consisting of Buffer and Acetonitrile mixture in the gradient proportion. The flow rate maintained was 0.8 ml/min and the wavelength used for detection was 235 nm.Results: The linearity was observed in the range of 0.025-50µg/ml of spiked impurities in Eprosartan Mesylate, impurity 1 and impurity 2 with a correlation coefficient of 0.99927, 0.99910 and 0.99934 respectively. The mean percentage recoveries for LOQ, 50%, 80%, 100%, 150% and 200% accuracy were found to be 101.5±1.51, 107.0±1.7, 104.6±0.4, 102.8±0.36, 101.7±0.26 and 101.3±0.15 respectively for impurities in Eprosartan Mesylate, impurity 1 and impurity 2. Linearity, accuracy, precision and robustness parameters for the suggested method were estimated for validation.Conclusion: The developed method is uncomplicated, accurate, sensitive and precise for the determination of related substances in the Eprosartan Mesylate. The satisfying % recoveries and low % RSD Values confirmed the suitability of the developed method for the usual analysis of Eprosartan mesylate in pharmaceuticals.
A high performance liquid chromatographic method with mass detection was developed for determination of Lamivudine and Zidovudine in human plasma. Lamivudine and Zidovudine were extracted from an aliquot of human plasma using Solid Phase Extraction technique, and then injected into a liquid chromatograph equipped with a tandem mass spectrometry detector; quantitation was done by peak area ratio method. A weighted (1/Conc2) linear regression was performed to determine the concentration of analyte. This method demonstrates acceptable performance and is suitable for the determination of Lamivudine and Zidovudine in human plasma over the range of 25.291 to 4046.621 ng/mL and 23.357 to 4057.l4lng/mL respectively using Solid Phase Extraction Procedure. As all the values obtained were within the limits as specified, the method has been successfully used to analyse the human plasma containing Lamivudine and Zidovudine with good recoveries and proved to be robust.
Our main objective is to develop an accurate and precise RP-HPLC method for the simultaneous determination of Valacyclovir HCl and Ritonavir in tablet dosage form. An Agilent TC-C18 (2) column is used for the Separation of drugs by a mobile phase consisting of methanol, acetonitrile and water mixture in the ratio of 35:41.5:23.5v/v. The flow rate maintained was 1.3 mL/min and the wavelength used for detection was 222 nm. The linearity was observed in the range of 12.5-125µg/ml for Valacyclovir HCl (VC) and Ritonavir (RT) with a correlation coefficient of 0.9987 and 0.9981 respectively. The mean percentage recoveries for 80%, 100% and 120% accuracy were found to be 101.7%±2.09, 100%±2.49 and 101.5%±1.61 respectively for VC. The mean percentage recoveries for 80%, 100% and 120% accuracy were found to be 104.3%±0.99, 100%±1.77and 99.0%±1.22 respectively for RT. Linearity, accuracy, precision and robustness parameters for the suggested method were estimated for validation. The developed method can be utilized in the analysis of VC and RT tablets.
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