Formulation and evaluation of sustained release matrix tablet of metoprolol succinate by using xanthan gum and carbopol

Metoprolol succinate is a β1 selective antagonist used as an Anti-hypertensive, Anti arrhythmic, Anti Angina. The aim of present investigation was to develop matrix tablets of Metoprolol succinate using different polymers.Metoprolol succinate matrix tablet was prepared by use of xanthan gum and carbopol-934 as a polymer initially by direct compression methods. Physicochemical compatibility of the drug with polymer was confirmed by IR spectroscopy and DSC. Metoprolol succinate matrix tablets were prepared by direct compression and wet granulation method using different polymers. All the formulations were evaluated for weight variation, thickness, hardness, friability and dissolution. The result of matrix tablets formulation (A-4) showed drug release 94.12% in 720 min. Therefore it was concluded that formulation (A-4) containing carbopol-934 and xanthan gum in the ratio of 80:20 showing promising result for sustained release of Metoprolol succinate, further for improvement of release profile in situ interpolymeric complexes of both carbopol and xanthan gum were tried. All the formulations were evaluated for weight variation, thickness, hardness, friability and dissolution. The results of IPC formulation B-11 showed drug release 96.29% in 720 min. It was concluded that tablets were prepared by using in-situ inter polymer complex formed with 70:30 ratio of Carbopol and Xanthan gum solution as binder. Formulation B-11 showed promising result because of its resistance in pH 1.2 HCL buffer for more than 2 hrs showed the maximum sustained release as compared to simple matrix tablet because of more acid resistance of the complex. Thus, sustained release matrix tablets of Metoprolol succinate using biocompatible polymers were successfully formulated, evaluated and found to be suitable candidates in extending the release of the drug from the matrix tablets. Keywords: Metoprolol succinate, Sustained release Matrix tablets, Direct compression, Wet granulation method.&nbsp

A review on polymers in natural or modified form used in sustained release tablet

Tablet is a solid dosage form which is used to deliver the drug to the body to make pharmacological action. The oral dosage form should disperse into small particles to deliver active ingredients in the body, the disperse time of the dosage form depends on the ingredients which are used in the tablet. To make the tablet disintegrate slow usually sustained release agents are used. The sustained release tablets helps in maintaining the drug concentration in the body for the higher time. In this review article various polymers of natural origin and their modified forms are studied, which can be used in the sustained release tablet. In this review article the polymers studied were, Psyllium husk, HPMC K100M, Cellulose polymers, Cellulose ether polymers, Xanthan gum, Guar gum, Eudragit RLPO, Eudragit RSPO, Eudragit RL 100, Eudragit RS 100, Kollidone SR and Carnauba wax. Now a day the sustained release tablets are used more than the conventional tablets because of the patient incompliance. The main part of the sustained release tablets are the polymers. In the study it was found that the modified forms of natural polymers works better than in their natural form. In the study it was found that the hydrophilic polymers also work better like Xanthan gum and Guar gum, they are effecting and non-toxic in nature. The cellulose derivatives were studied and it was found that Substituted cellulose-methylcellulose, hydroxypropylcellulose and hydroxypropylmethylcellulose works better in the combination form. Keywords: Sustained release, Xanthan gum, Guar gum, Eudragit, Kollidone, HPM

Formulation and Evaluation of Clindamycin phosphate Niosomes by using Reverse Phase Evaporation Method

The formulate and evaluate Niosome drug delivery system for Clindamycin phosphate to increase its effectiveness by increasing penetration through skin and reducing its side effects Sorbitan esters which are Non-ionic surfactants was the key ingredient which forms vesicles upon hydration with aqueous media. Cholesterol was used to make vesicle stable and rigid. Different formulations were preparing by using different sorbitan ester and changing the ratio of surfactant and Cholesterol. Clindamycin Phosphate is an antibiotic widely used for the treatment of acne. The pseudomonas colitis occurs with oral dosage form while in topical dosage forms it has side effects like irritation, skin rash, itching etc. its topical bioavailability is also less. An attempt has been made to overcome these limitations for the preparation to prepare niosomes of clindamycin phosphate as well as for the enhanced delivery through skin by the variation in cholesterol level. Niosome were prepared by reverse phase evaporation method using span 60 as polymer. The compatibility of drug and polymer is analyzed by using FTIR and DSC method. There was no interaction detected by FTIR, DSC study. Further the prepared niosomes were evaluated for drug entrapment efficiency, drug content, and in vitro drug release. Amongst all the formulation batch 3 shows the best release when compared to other batch. SEM (Scanning electron microscopy) revealed that niosomes were spherical and porous. Finally it was concluded that clindamycin phosphate have been found suitable for controlled release formulation due to its bioavailability and biodegradability and thus lead to improved patient compliance. Keywords: Niosomes, Clindamycin Phosphate, Reverse phase evaporation method, Span60

Massive sublingual hematoma secondary to anticoagulant therapy complicated by a traumatic denture: a case report

<p>Abstract</p> <p>Introduction</p> <p>Sublingual hematoma secondary to excessive anticoagulation is a rare but potentially fatal condition, and few cases have been documented in the literature.</p> <p>Case presentation</p> <p>We report the case of a 73-year-old Caucasian woman who attended our Accident and Emergency department with massive sublingual hematoma causing superior displacement of the tongue. The condition was found to be the result of an elevated international normalized ratio, further complicated by a traumatic mandibular denture.</p> <p>Conclusions</p> <p>In summary, we recommend the immediate reversal of anticoagulation therapy on admission of patients with severe sublingual hematoma. We further advise surgical decompression/drainage if required and to continue meticulous monitoring. In all cases of early recognition of sublingual hematoma, prompt medical treatment and continuous clinical monitoring is essential, and may prevent the need for a surgical airway procedure.</p

THE Formulation and Characterization of Transdermal Patch of Candesartan Celexitil

The aim of the present study is to formulate and characterized the transdermal patch of Candesartan celexitil. The objective is study was to increase the bioavailability of drug. In the present study, transdermal patch of Candesartan celexitil were prepared&nbsp; by solvent casting technique employing HPMC cps 50 polymer and glycerin as plasticizer using mercury as substrate. Total thirteen formulation (F1-F13) were prepared having drug and polymer ratio (1:2, 1:4, 1:6, 1:8, and 1:10). From the selected batch F2 containing drug polymer ratio (1:4), four formulations each were prepared and evaluated containg drug urea (1-4%) and oleic acid (1-4%) as permeation enhancer. The prepared transdermal patches were evaluated on the basis of different parameters like weigh, thickness, folding endurance, percent moisture absorption, percent moisture loss, drug content uniformity, in vitro skin permeation study. The fabricated final transdermal patches were further subjected to in vitro permeation study. In order to confirm the exact mechanism of drug release from all the patches, the data were computed and graphed according to Korsmeyer equation. Diffusion exponent of release process controlled by Super case Ⅱ transport Non- Fickian diffusion, n values of Korsmeyer- Peppas model shows a combination of diffusion and dissolution mechanism indicating the drug release from the formulation was controlled by more than one process. It was concluded that the prepared formulation F13 (4% w/v of oleic acid) showed highest cumulative percent drug release and increase the bioavailability of the drug. Keywords: Novel drug delivery system, Transdermal drug delivery, Transdermal drug delivery system, Differential scanning calorimetry