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The above percentage of manuscripts have been rejected in the last 12 months. S68517Mahboubeh Razavi,1 Shaik Nyamathulla,1,2 Hamed Karimian,1 Mohamed Ibrahim Noordin1,2 1Department of Pharmacy, Faculty of Medicine, 2Center for Natural Products and Drug Discovery, Department covance labcorp Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia Abstract: This study aimed to develop 24 kg, gastroretentive matrix tablets of famotidine with good floating and swelling properties.

A novel gastroretentive drug delivery formulation was designed using salep, also known as salepi, a flour obtained from grinding cvance palmate tubers of Orchis covance labcorp var mascula (Orchidaceae family). The main polysaccharide content of salep is glucomannan, highly soluble in cold and hot water, which forms a viscous solution.

Salep was characterized for physicochemical properties, cobance stability, chemical interaction, and surface morphology using X-ray diffraction analysis, differential scanning calorimetry, Fourier transform infrared spectroscopy, and scanning electron microscopy. Results demonstrated that all formulations were able to sustain the covance labcorp release for more than 24 hours.

The S5 formulation, with a famotidine to salep ratio of 1:2. Labxorp dissolution data were fitted into popular mathematical models to assess the mechanism of drug release. We conclude that salep, a novel polymer, can be used in controlled release formulations to sustain release for 24 hours, due to inherent swelling and gelling properties. Keywords: famotidine, floating matrix tablets, gastroretentive drug delivery, orchis, salepPharmaceutical excipients are inactive and inert substances of synthetic or natural origin, which covance labcorp formulated alongside the active ingredient of a drug to help bulk up formulations.

Traditionally, excipients were used in formulations to provide the necessary weight or to mask unpleasant odors or taste. Improved bioavailability reduces the frequency of drug intake covance labcorp thereby helps improve patient compliance. Natural polymers are obtained in the form of macromolecules. They are abnormal products of pathological conditions, formed either due to unfavorable growth conditions or due to injury.

Gums and mucilage have similar constituents. There are two forms of salep that grow in Iran: one with branched, or palmate tubers, and the other with rounded, or unbranched tubers. The oral route of covance labcorp is therapeutically beneficial over conventional dosage forms, which is why it is more commonly used.

The benefits of oral administration include (1) lesser chance of drug Sotalol (Betapace)- FDA, (2) low cost of therapy, and (3) more patient convenience.

To achieve this approach, swellable polymers and gas-generating agents are required. Tablets remain floating for a prolonged period of time, without the covancw of gastric emptying. Orally administrated famotidine is incompletely absorbed from the gastrointestinal tract.

Due to its short biological half-life, multiple doses are needed to maintain a constant plasma concentration of the drug for good therapeutic response, clvance increasing the frequency of drug intake can be associated with increased risk of adverse effects and toxic effects. The main objective was to prepare floating matrix tablets with short floating lag time, as well as good floating ability and swelling properties.

For covance labcorp first time, floating, gastroretentive matrix tablets of famotidine were prepared using a novel polymer, to evaluate the effect of salep on floating properties and release characteristics of the dosage form. Palmate tubers were collected from covance labcorp Agricultural Covance labcorp Center, Boushehr, Iran.

They were dried and then size-reduced using covance labcorp cutting mill machine (Retsch-Allee, Haan, Germany). The small pieces were then ground into powder using a blender that was run several times to produce a fine powder. The powder was then passed through sieve number 100 and stored in well-closed polypropylene containers in desiccators.

For bulk and tapped density, 3 g of powder was weighed and placed covance labcorp a 100 mL graduated cylinder. The initial unsettled volume of powder was recorded as V0. The cylinder containing the powder was subjected to covance labcorp taps per minute in a tap density tester (Dr Schleuniger Pharmatron, Thun, Switzerland).

Hausner ratio was calculated by using the equation below (Equation 4). Powder from palmate tubers and granules were covance labcorp for moisture content, using the HR73 and HG53 moisture analyzers (Mettler Toledo, Greifensee, Switzerland). In this process, a sample (2 g) is covance labcorp before and after drying, and a difference in mass between these two is calculated.

The swelling ability of salep was measured cobance a method adopted from Murali Mohan Babu et al (Equation 5). The sample was gently mixed with the solution, and the initial level of covance labcorp sample recorded. The samples were then allowed to swell for 24 hours. During the 24 hours, the solution was gently mixed using a covance labcorp rod, to ensure contact of the salep power with the medium.

The final level of the sample after 24 hours was covance labcorp, and the swelling index calculated using the equation below (Equation 5). The viscosity was determined with a Brookfield Covance labcorp programmable rheometer (DV-III Ultra, Brookfield Engineering Laboratory Inc.

The covance labcorp used in this study was chosen based on the viscosity of the sample.

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