Pharmaceutics Articles

25 October 2011

Formulation and Evaluation of Atenolol Floating Microsphere

About Author: Mr. Patil Kuldip, Tekade B. W., Thakare V. M., Dr. Patil V. R.
T. V. E. S’s College of Pharmacy,
Faizpur (M.S.), India

Abstract
The purpose of this research was to prepare a floating drug delivery system of atenolol. In the present study, preparation of atenololfloating microspheres, evaluation of Floating Drug Delivery System (FDDS) in vitro, prediction of the release, and optimization of stirring speed and polymers ratio to match target release profile was investigated. Floating microspheres were prepared by solvent evaporation (Oil-in-water emulsion) technique using hydroxylpropyl methylcellulose (HPMC), Ethyl cellulose (EC) and Eudrajit S100 as the rate controlling polymers. Particle size analysis, drug entrapment efficiency, surface topography, and release studies were performed. Results showed that the polymer ratio and stirring speed affected the size, incorporation efficiency and drug release of microspheres (> 12 h), and the best results were obtained at the ratio of EC (1:3). The mean particle size of prepared floating microspheres increased but the drug release rate from the microspheres decreased as the polymer concentration increased. The developed floating microspheres of atenolol may be used in clinic for prolonged drug release in stomach for at least 12 hrs, thereby improving the bioavailability and patient compliance.

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25 October 2011

A Case Report on Comorbidities and Laboratory Abnormalities of Lamivudine in Hepatitis B Patients

About Authors:Dhaval Patel*^[1], Pratham Rathore^[1], Prerna Sharma^[1], Dr. Pankaj Shah^[2]
1 Department of Pharmacy Practice,
School of Pharmaceutical Sciences,
Jaipur National University,
Jaipur -302025, (Rajasthan), India
2 Institute of kidney disease and research center,
civil hospital, Ahmedabad, (Gujarat), India

Abstract
Inpresent study, comorbidities and laboratory abnormalities of lamivudine was analysed in hepatitis b patients. Clinical data were collected from hepatitis b patients that presented with laboratory abnormalities to lamivudine. We examined 100 patients of hepatitis b who treated with lamivudine in i.k.d.r.c, civil hospital, Ahmedabad from January 2009 to February 2011. The main laboratory abnormalities were elevation of creatine kinase, elevation of AST, elevation of serum lipase. Hypertension was the major comorbidities with the hepatitis b. The laboratory abnormalities were related to lamivudine, but the biological mechanism of the reaction is not clear.
24 October 2011

Study of Improvement of Dissolution Rate of Gliclazide By Solid Dispersion Technique Using Poloxamer 407

About Authors:
Garg Pushpendra, Nanda Arun
Department of Pharmaceutical Sciences
Maharshi Dayanand University, Rohtak-124001
Haryana, India.

ABSTRACT
The objective of the present study was to improve the dissolution rate of gliclazide, a poorly water soluble (BCS class-II) drug by solid dispersion technique using a water soluble carrier, poloxamer 407. The solid dispersions were prepared by fusion method using different concentrations of carrier and the prepared systems showed an enhancement in dissolution. Solid dispersions were characterized with Differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and dissolution analysis. The study revealed that enhanced dissolution of gliclazide from solid dispersion was due to a decrease in crystallinity of drug and also due to dissolution of gliclazide in molten form of solid dispersion. In conclusion preparation of gliclazide dispersion with meltable hydrophilic polymer could be a promising approach to improve the dissolution rate.
24 October 2011

Formulation and in Vitro Evaluation of Sustained Release Matrix Tablets of Lornoxicam

About Author: G. Anand Rao*, V. Venu, R. Senthil Selvi, P. Perumal,
Department of Pharmaceutics,
J. K. K. Nattraja College of Pharmacy,
Komarapalayam - 638 183, Namakkal (D.T),
Tamil Nadu, India

Abstract
The main objective of the present work was to develop sustained release matrix tablets of Lornoxicam using Hydrophilic polymers viz. Hydroxy propyl methyl cellulose (HPMC K4M, HPMC K10M, HPMC K15M) was developed using wet granulation technique at varying ratios of drug and polymer like 1:1, 1:2 and 1:3 were selected for the study. Micro crystalline cellulose and Lactose was added in this formulation as a function of binder and diluent. Prior to compression, the prepared granules were evaluated for flow and compression characteristics. After evaluation of physical properties of tablet, the in vitro release study was performed in 0.1 N Hcl, pH 1.2 for 2 hrs and in phosphate buffer pH 6.8 up to 12 hrs. The effect of polymer concentration and polymer blend concentration were studied. Dissolution data was analyzed by Korsmeyer- Peppas law expression. It was observed that matrix tablets contained polymer HPMC K10M was successfully sustained the release of drug up to 12 hrs. Among all the formulations, formulation F9 which contains 1:3 ratios of drug and polymer release the drug which follows Zero order kinetics via, swelling, diffusion and erosion. Stability studies (40±2oc/75±5%RH) for three months indicated that Lornoxicam was stable in the matrix tablets. The FTIR study revealed that there was no chemical interaction between drug and excipients.
22 October 2011

Surface Morphology and Drug Release Studies on Repaglinide Controlled Release Pellets Prepared by Solution Layering Method with Blend of PEG - HPMC - EC Polymers

About Author: Patil Amol Vilas,* Madgulkar Ashwini R., Bhingare Chandrashekhar L., Bhalekar Mangesh R., Jamadar Shahaji Ambadas
Department of Pharmaceutics,
AISSMS College of Pharmacy,
Kennedy Road, Near R.T.O.,
Pune - 411 001, INDIA

Abstract
Pellets are of great interest to the pharmaceutical industry for a variety of reasons. Pelletized products not only offer flexibility in dosage form design and development, but are also utilized to improve safety and efficacy of bioactive agents. However, the single most important factor responsible for the proliferation of pelletized products is the popularity of controlled release technology in the delivery of drugs. This research article mainly focused on the Surface Morphology and Drug Release Studies on Repaglinide Controlled Release Pellets Prepared by Solution layering method with Blend of PEG - HPMC - EC Polymersof controlled release pellets of Repaglinide. Surface morphology study to revel morphological changes when pellets were exposed to dissolution study and correlate their relation from P1 to P9 batches. Amongst all batches, P1 batch selected for morphological evaluation by using Scanning Electron Microscopy (SEM). XRD study done for powder characterization of drug before and after manufacturing process. Cellulose derivative blend of Hydroxypropyl methylcellulose (HPMC-K100), Ethyl cellulose (EC) and PEG4000, due to their hydrophilic and hydrophobic properties and ease of application provide desired drug release profile Upto 12 Hrs, when used in optimum concentration P1 batch (1:1%).
21 October 2011

Preparation and Evaluation of Fast Dissolving Tablets for an Selected Drug

About Author: Vipul Kumar Tyagi (B.Pharm)
Shri Gopichand College Of Pharmacy,
Ahera (Baghpat)

Introduction
Tablet is the most popular among all dosage forms existing today because of its convenience of self administration, compactness and easy manufacturing; however hand tremors, dysphasia in case of geriatric patients, the underdeveloped muscular and nervous systems in young individuals and h case of uncooperative patients, the problem of swallowing is common phenomenon which leads to poor patient compliance. To overcome these drawbacks, mouth dissolving tablets (MDT) or orally disintegrating tablets; (ODT) has emerged as alternative oral dosage forms. These are novel types; of tablets that disintegrate/dissolve/ disperse in saliva within few seconds. A fast dissolving tablet was prepared by using various super disintegrants taken in different concentration (10%, 12%, and 14%) and one control batch is prepared without disintegrants designated as four different groups of formulations(F-1,F-2,F-3 and F-4) . Chemical incompatibility studies confirmed that there is no interaction between drug and excipients used in the formulations. All the batches are prepared by direct compression method. Effect of disintegrants on the disintegration behaviour was evaluated, and all the tablets were evaluated for hardness, friability, weight variation, water absorption ratio, dissolution, and assay.Direct compression method involves the incorporation of superdisintegrants in to the formulation. Direct compression does not require water or heat during formulation procedure and it is well suited for moisture and heat sensitive drugs. Fast dissolving tablets have so many advantages over liquid dosage form and conventional tablets. Fast dissolving tablet is suited for tablets which are undergoing first pass effect, and it is increase their bioavailability. A fast-dissolving drug delivery system, in most cases, is a tablet that dissolves or disintrigrants in the oral cavity without the need of water or chewing. Most fast-dissolving delivery system films must include substances to mask the taste of the active ingredient. This masked active ingredient is then swallowed by the patient’s saliva along with the soluble and insoluble excipients. These are also called melt-in-mouth tablets, repimelts, porous tablets, oro-dispersible, quick dissolving or rapid disintegrating tablets.
19 October 2011

A Comparative Study of Powder v/s Gel of Proniosomal Drug Delivery System of Flurbiprofen

About Author: Prajapati S. K., *Sunil Kumar, Singh K. Anup
Institute of Pharmacy, Bundelkhand University,
Jhansi - 284 128 (U. P.), India.

Abstract
In present study, an attempt has been made to evaluate a Comparative study of powder v/s gel of proniosomal drug delivery system of flurbiprofen. Flurbiprofen, are nonsteroidal anti-inflammatory drug (NSAIDs) is used for the relief of pain and inflammation associated with rheumatoid arthritis and osteoarthritis. It exhibits anti-inflammatory, analgesic and antipyretic activities. It will be also effected the transdermal system rate because of its size, nature and chemistry, these systems give better drug permeability from biological bioavailability membranes and helps in solubilization of some practically insoluble drugs and hence solve problems of many drug. In the present study we are using various surfactant like span 20, 40, 60, 80, and brij 35 and studided in various proniosomal powder and gel formulation and studie in both result in following formulation. In this result proniosomal gel of formulation brij 35 show better entrapment and highest in vitro drug release. The best result obtain in which formulation which having equimolar ratio(1:1) of brij 35 and cholesterol.The release mechanism was explained with zero order, first order, higuchi equations.
19 October 2011

Review on Ion Exchange Resin: An Approach towards Sustained / Controlled Release Delivery System

About Author: Mr. Mahesh W. Thube*, Dr. Sadhana R.Shahi, Mr. Abhay Padalkar
Mr. Mahesh W. Thube*: Department of Pharmaceutics,
Government College of Pharmacy, Aurangabad - 431 005, Maharashtra, India
Dr. Sadhana R. Shahi: Assisstant Professor, Govt. College of Pharmacy, Aurangabad, Department of Pharmaceutics.

Abstract
Ion exchange resin (IER) is high molecular weight polyelectrolyte having charged functional site. IER are chemically vinyl, divinyl benzene and polystyrene copolymers. IER in past years have received extensive attention by pharmaceutical industry due to their versatile application. Previously IER were mainly used for water purification only but recently they have been studied for Novel Drug Delivery System. IER are mainly used for taste masking but, they also possess modifying release properties. The IER are complexed with drug to form resinates by batch process or column process. If necessary the resinates are coated with polymeric material by microencapsulation technique. Coated resinates acts as a controllable rate limiting factor for exchange of ions and also for exchange of drug, thus, modifying the release of drugs. The review article highlights the application of sustained and controlled release resinate for the development of various drug delivery system.
18 October 2011

Spectroflourimetric Method for the Estimation of Darifenacin in Pure and Pharmaceutical Formulations

About Author: P. Sai Praveen*, G. Devala Rao, B. Anupama, V. Jagathi
K. V. S. R Siddhartha College of Pharmaceutical Sciences,
Vijayawada - 520 010.

Abstract:
A simple and sensitive spectroflourimetric method has been developed for the estimation of Darifenacin in pure and pharmaceutical dosage forms. Beers law was obeyed in the range of 1 – 5 µg/ml in methanol at an excitation wavelength (λex) of 292nm and an emission wavelength (λem) of 314nm with good correlation coefficient of 0.9995. The limit of detection (LOD) and limit of Quantification (LOQ) for this method are 0.138 and 0.418 µg/ml respectively and the relative standard deviation of intra-day precision was 0.71% and inter-day precision was 1.07%. Stability studies with respect to time and temperature were also carried out. The results obtained were in good agreement with the labelled amounts of the marketed formulations. This method has been statistically evaluated and found to be accurate and precise.

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18 October 2011

To Study Hospital Formulary Management in Tertiary Care Hospital

About Author: Vinita Dagar, B. P. Srinivasan
Research scholar (M.Pharmacy - Pharmaceutical Management)
Department of Pharmaceutical Management
Delhi Institute of Pharmaceutical Sciences and Research,
Delhi University,
Sec-3, Pushp vihar,
New Delhi-17, India.

Abstract
Access to all medicines that is required in a hospital is needed to be looked after by the hospital management. Formulary list contains those drugs. It is important that all the hospitals have their own formulary list so that these drugs are procured, purchased and used for the patients. Formulary list is a list of drugs selected based on the criteria of safety, efficacy and cost to meet the major requirement of hospital Formulary is a manual that describes each and every medicine or drug enlisted in formulary list i.e. formulary includes strength, dose, dosage form, adverse effects etc of drugs. Which drugs are to be selected, depends on many factors, such as the pattern of prevalent diseases, the treatment facilities, the training and experience of available personnel, the financial resources, and genetic, demographic and environmental factors and selection criteria A drug and therapeutics committee (DTC) can significantly improve drug use and reduce costs in hospitals and other health care facilities: inventory can be defined as an idle resource which has an economic value. It is however, commonly used to indicate various items of stores kept in stock in order to meet future demands.