Patel B.B.,Hemchandracharya North Gujarat University |
Patel B.B.,Evonik Industries |
Patel J.K.,Nootan Pharmacy college |
Chakraborty S.,Evonik Industries
Recent Patents on Drug Delivery and Formulation | Year: 2014
Spray drying has always remained an energetic field of innovation in pharmaceutical, food and flavor industry since last couple of decades. The current communication embodies an in-depth application of spray drying in pulmonary drug delivery for production of uniform and respirable size particles suitable for nebulizers, dry powder inhalers (DPI) and pressurized metered dose inhalers (pMDI). The review also highlights spray drying application in the manufacturing of mucoadhesive formulation suitable for nasal cavities to improve the drug absorption and bioavailability. Recent research works and patents filed by various researchers on spray drying technology for solubility enhancement have also been accentuated. Benefits of spray drying in production of dry flavorings to meet a product with maximum yield and least flavor loss are also discussed. The use of spray drying in production of various food products like milk or soymilk powder, tomato pulp, dry fruit juice etc, and in encapsulation of vegetable oil or fish oil and dry creamer has been discussed. Current review also highlights the application of spray drying in the biotechnology field like production of dry influenza or measles vaccine as well as application in ceramic industry. Spray drying based patents issued by the U.S. Patent and Trademark Office in the area of drug delivery have also been included in the current review to emphasize importance of spray drying in the recent research scenario. © 2014 Bentham Science Publishers.
Patel J.,Nootan Pharmacy College
Journal of Microencapsulation | Year: 2012
The purpose of this research was to formulate and systemically evaluate in vitro and in vivo performances of mucoadhesive amoxicillin microparticles for the potential use in the treatment of gastric and duodenal ulcers, which were associated with Helicobacter pylori. The chitosan/amoxicillin microparticles were successfully prepared in a process of solution-enhanced dispersion by supercritical CO 2 (SEDS). The morphological characteristics of the mucoadhesive microparticles were studied under scanning electron microscope. The resulted microparticles with mean sizes ranged from 1.0 and 2.5m had good mucoadhesive properties. In vitro and in vivo mucoadhesive tests showed that chitosan/amoxicillin mucoadhesive microparticles adhered more strongly to gastric mucous layer and could retain in gastrointestinal tract for an extended period of time. The X-Ray Powder Diffractometry and Differential Scanning Calorimetry analysis demonstrated that the SEDS process was a typical physical coating process to produce drug-polymer composite microparticles, which is favourable for drugs since there is no changes in chemistry. In vitro release test showed that amoxicillin released faster in pH 1.0 hydrochloric acid (HCl) than in pH 7.8 phosphate buffer. In vivo H. pylori clearance tests were also carried out by administering amoxicillin powder and mucoadhesive microparticles to H. pylori infectious Wistar rats under fed conditions at single dose or multiple dose(s) in oral administration. The results showed that amoxicillin mucoadhesive microparticles had a better clearance effect than amoxicillin powder. In conclusion, the prolonged gastrointestinal residence time and enhanced amoxicillin stability resulting from the mucoadhesive microparticles of amoxicillin might make a contribution to H. pylori complete eradication. © 2012 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.
Patel J.,Nootan Pharmacy College |
Patel D.,Ganpat University |
Raval J.,Ganpat University
Iranian Journal of Pharmaceutical Research | Year: 2010
The purpose of this research was to formulate and systemically evaluate in-vitro and in-vivo performances of mucoadhesive propranolol hydrochloride microspheres for its potential use in the treatment of hypertension, myocardial infraction and cardiac arrhythmias. Propranolol hydrochloride mucoadhesive microspheres, containing carbopol-934P as mucoadhesive polymer and ethyl cellulose as carrier polymer, were prepared by an emulsion-solvent evaporation technique. Results of preliminary trials indicated that the quantity of emulsifying agent, time for stirring, drug-to-polymers ratio, and speed of rotation affected various characteristics of microspheres. Microspheres were discrete, spherical, free-flowing and showed a good percentage of drug entrapment efficiency. An in-vitro mucoadhesive test showed that propranolol hydrochloride mucoadhesive microspheres adhered more strongly to the gastric mucous layer and could be retained in the gastrointestinal tract for an extended period of time. A 32 full factorial design was employed to study the effect of independent variables, drug-to-polymer-to-polymer ratio (propranolol hydrochloride-ethyl cellulose-carbopol-934P) (X 1), and stirring speed (X 2) on dependent variables, i.e. percentage of mucoadhesion, drug entrapment efficiency, particle size and t 80. The best batch exhibited a high drug entrapment efficiency of 54 %; 82% mucoadhesion after 1 h and particle size of 110 μm. A sustained pattern of drug release was obtained for more than 12 h. The drug-to-polymer-to-polymer ratio had a more significant effect on the dependent variables. The morphological characteristics of the mucoadhesive microspheres were studied under a scanning electron microscope. In-vivo evaluation studies on propranolol hydrochloride mucoadhesive microspheres and propranolol hydrochloride powder were performed on normal healthy rabbits. The results showed a sustained anti-hypertensive effect over a longer period of time in case of mucoadhesive microspheres, compared to the powder. In conclusion, the prolonged gastrointestinal residence time and slow release of propranolol hydrochloride resulting from the mucoadhesive microspheres, could contribute to the provision of a sustained anti-hypertensive effect. © 2010 by School of Pharmacy Shaheed Beheshti University of Medical Sciences and Health Services.
Patel N.,Anand Pharmacy College |
Patel J.,Nootan Pharmacy College |
Shah S.,L J Institute Of Pharmacy
Acta Pharmaceutica | Year: 2010
The aim of this study was to investigate the combined influence of 3 independent variables in the compression coated tablet of mesalamine for ulcerative colitis. A 3-factor, 3-level Box-Behnken design was used to derive a second order polynomial equation and construct contour plots to predict responses. The independent variables selected were: percentage of polymers (pectin and compritol ATO 888) in compression coating (X1), coating mass (X2) and coating force (X3). Fifteen batches were prepared and evaluated for percent of drug released in 5 h (Y5), time required for 50 % mesalamine to dissolve (t50) with rat cecal (RC) content and without rat cecal content (t50), percent of drug released in 24 h in the presence of rat cecal content (Y24 with RC). Transformed values of independent and dependent variables were subjected to multiple regressions to establish a full-model second-order polynomial equation. F was calculated to confirm the omission of insignificant terms from the full-model equation. The computer optimization process and contour plots predicted the levels of independent variables X1, X2, and X3 (0, 0.2 and -0.15, respectively) for colon targeting and total percent of drug released up to 24 h.
Patel J.K.,Nootan Pharmacy College
Current drug delivery | Year: 2013
The mucoadhesive microparticles (CHCNZ) composed of chitosan (CH) and cinnarizine (CNZ) hydrochloride were successfully prepared, in a process of solution-enhanced dispersion, by supercritical CO2 (SEDS) technique. Scanning electron microscopy was used to reveal the morphological characteristics of mucoadhesive microparticles. The average particle size of microparticles was in the range from 1.9 to 12.8 μm. In vitro and in vivo mucoadhesive tests showed that CHCNZ mucoadhesive microparticles adhered more strongly to gastric mucous layer. Thereby retaining in gastrointestinal tract for an extended period of time and exhibiting good mucoadhesive properties. The X-ray powder diffractometry and differential scanning calorimetry analysis demonstrated that the SEDS process was an efficient physical coating process to produce CHCNZ composite microparticles. It also suggests that CNZ did not undergo chemical changes during the production of microparticles. The optimized batch exhibited a high drug entrapment efficiency of 67% with particle size of 3.9 μm. A sustained pattern of drug release was obtained for more than 20 h. In vivo studies were carried out by administering orally cinnarizine HCl (CNZ) suspension and mucoadhesive microparticles to rabbits under fasted (for 12 h) conditions. The results showed that CNZ mucoadhesive microparticles had a better bioavailability than CNZ suspension due to longer retention in the gastric environment of the test animals.
Joshi H.V.,Jodhpur National University |
Patel J.K.,Nootan Pharmacy College
Journal of Applied Pharmaceutical Science | Year: 2011
Two simple, accurate, precise, reproducible, requiring no prior separation and economical procedures for simultaneous estimation of Amlodipine besylate (AML) and Lisinopril (LIS) in tablet dosage form have been developed. First method is simultaneous equation method; in this method 360.0 nm and 248.0 nm were selected to measure the absorbance of drugs at both wavelengths. The second method is Q-value analysis based on measurement of absorptivity at 300.0 nm (as an iso-absorptive point) and 360.0 nm. AMD and LIS at maximum wavelength of AML, 360.0 nm and at isoabsorptive point 300.0 nm shows linearity in a concentration range of 5- 40 μg/mL. Recovery studies range from >99.82% for AMD and >98.09% for LIS in case of simultaneous equation method and >100% for AMD and >98.45% for LIS in case of Q-analysis method confirming the accuracy of the proposed method. The proposed methods are recommended for routine analysis since it is rapid, simple, accurate and also sensitive and specific (no heating and no organic solvent extraction is required).
Deshmukh A.B.,Shankersinh Vaghela Bapu Institute of Pharmacy |
Patel M.C.,Shankersinh Vaghela Bapu Institute of Pharmacy |
Mishra B.,Nootan Pharmacy College
Renal Failure | Year: 2013
The role of the kidney in glucose homeostasis and the potential of the kidney as a therapeutic target in type 2 diabetes is little appreciated. Hyperglycemia is an important pathogenic component in the development of microvascular and macrovascular complications in type 2 diabetes mellitus. Inhibition of renal tubular glucose re-absorption that leads to glycosuria has been proposed as a new mechanism to attain normoglycemia and thus prevent and diminish these complications, thus representing an innovative therapeutic strategy for the treatment of hyperglycemia and/or obesity in patients with type 1 or type 2 diabetes by enhancing glucose and energy loss through the urine. Sodium glucose co-transporter 2 (SGLT2) has a key role in re-absorption of glucose in kidney. Competitive inhibitors of SGLT2 have been discovered and a few of them have also been advanced in clinical trials for the treatment of diabetes. Copyrigh © Informa Healthcare USA, Inc.
Patel J.K.,Nootan Pharmacy College |
Sutariya V.B.,University of South Florida
Journal of Microencapsulation | Year: 2015
Micronisation of simvastatin dissolved in acetone, dimethyl sulfoxide and ethanol with supercritical carbon dioxide as antisolvent was successfully performed using a supercritical antisolvent technique. The effect of a few process parameters such as precipitation temperature, the pressure and solute concentration in the liquid solution has been studied to evaluate their influence on morphology and size of particles. The micronised simvastatin were evaluated for drug content, particle size analysis and in vitro dissolution profiles. Fourier transform infrared spectroscopy, differential scanning calorimetry and PXRD patterns was used to study the possible changes after micronisation of simvastatin. The dissolution rate was increased after micronised compared with pure simvastatin in distilled water, pH 1.2 buffer and pH 7.0 buffer. In vivo performance of the optimised formulation was evaluated in rats using pharmacodynamic marker parameters like serum total cholesterol (CH) and triglycerides (TG) for 21 days. Pharmacodynamic studies of micronised simvastatin revealed improved reduction in CH and TG values as compared with pure simvastatin indicating improved bioavailability. In vivo pharmacokinetics in rats showed an increase in bioavailability of micronised simvastatin (3.14 times) compared with plain simvastatin. © 2014 Informa UK Ltd. All rights reserved: reproduction in whole or part not permitted.
Patel M.J.,Jodhpur National University |
Patel J.K.,Nootan Pharmacy College
International Journal of Pharma and Bio Sciences | Year: 2012
Nicotine caused significant increase in the serum Cholesterol, Triglyceride, VLDL, LDL & significant reduction in HDL level. Premna integrifolia & Atorvastatin treatment showed significant prevention in increased serum Cholesterol, Triglyceride, LDL as compared to Nicotine control (NC) group. While HDL level was significantly increased in treated & standard group as compared to Nicotine control (NC) group. Materials and methods used for research are as: male albino rats weighing 200-250 gm were divided into 4 groups viz. Normal control; Nicotine control (NC); Nicotine control (NC) & Premna integrifolia (Agnimantha) (500 mg/kg) treated; Nicotine control (NC) & Atorvastatin treated (standard control). Blood samples were collected after 7 days, for lipid estimation. From the above results we conclude that Premna integrifolia is effective as an anti-hyperlipidemic agent.
Deshmukh A.B.,Nootan Pharmacy College |
Patel J.K.,Nootan Pharmacy College
Indian Journal of Pharmacology | Year: 2011
Objective: To assess the renoprotective activity of the water extract of Annona squamosa in 5/6 nephrectomized animals. Materials and Methods: For evaluating the renoprotective effects of Annona squamosa, 5/6 nephrectomized rats were used as a model for renal failure. The effects of hot-water extract of leaves of Annona squamosa L. (A. squamosa) at a dose 300 mg/kg bw on biochemical and urinary parameters like plasma urea, plasma creatinine, and urine creatinine were analyzed. For elucidating its effect on oxidative stress, renal superoxide dismutase (SOD) levels were measured. Results: Nephrectomized rats (5/6) showed a significant rise in plasma urea and creatinine levels with a stable fall in urine creatinine. Treatment with A. squamosa extract (300 mg/kg bw) lead to a significant fall in the plasma urea and creatinine values with partial restoration to normal values along with a significant rise in the activity of SOD. Conclusion: Thus, therapeutic strategies against oxidative stress could be effective in renal diseases. This study provides an indication to investigate further the efficacy of A. squamosa as a novel agent for alleviating renal failure.