Posted by admin on Jun 1, 2011 in |
Pelletization process first came into existence way back during the 1950s, when the first product was introduced to the market. These pelletized dosage forms have gained popularity considerably from then because of their distinct advantages, such as ease of capsule filling because of better flow properties of the perfectly spherical pellets; enhancement of drug dissolution; ease of coating; sustained, controlled, or site-specific delivery of the drug from coated pellets; uniform packing; even distribution in the GI tract; and less GI irritation. Pelletized dosage forms can be prepared by a number of techniques, including drug layering on nonpareil sugar or microcrystalline cellulose beads, spray drying, spray congealing, roto granulation, hot-melt extrusion, and spheronization of low melting materials or extrusion-spheronization of a wet mass. The present review outlines the recent findings on the manufacturing and evaluation of spherical pellets. The techniques namely extrusion-spheronization, hot melt extrusion, freeze pelletization, cryopelletization have been discussed along with formulation requirements for the process, parameters affecting pelletization. Evaluation of quality of the pellets is discussed with...
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Posted by admin on Jun 1, 2011 in |
An HPTLC method for estimation of Fluoxetine in its capsule formulation has been developed. It employs aluminium backed silica gel 60 F254 TLC plates, (20 cm × 10 cm, layer thickness 0.2 mm) prewashed with methanol and mobile phase comprising of toluene: 2-propanol: ammonia 2:2:0.4 (v/v/v). The developing solvent was run upto 80 mm in Camag chamber previously saturated with 10.0 mL of solvent mixture for 30 min. Densitometric scanning was then performed with Camag TLC scanner-3 equipped with winCATS software Version 1.3.0 at λmax 227 nm. The Rf value was found to be 0.74. The recovery of Fluoxetine was found to be 99.90% ± 1.68. The limit of detection and limit of quantitation were found to be 43.55 ng/spot and 131.99 ng/spot. The % RSD of intra-day variation and inter day variation were 0.54 and 0.41...
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Posted by admin on Jun 1, 2011 in |
The present study was undertaken to evaluate the locomotor effect of chloroform extract of Semecarpus anacardium (Linn.) (CHSA) by using photoactometer. Its anticonvulsant property was tested against maximal electroshock (MES)-induced convulsion (MESIC), pentalenetetrazol (PTZ)-induced convulsion (PTZIC), strychnine-induced convulsion (SIC), picrotoxin-induced convulsion (PIC), isoniazid (INH)-induced convulsion (IIC) and 4-amino pyridine (4-AP)-induced convulsion (4-APIC) in mice. The gamma-amino butyric acid (GABA) level was estimated by spectroscopic method. Significant reduction in locomotor scores were recorded with a diazepam (5 mg/kg) but not with CHSA (100, 200 & 400 mg/kg). In MESIC a phenytoin (25 mg/kg) was possessed anticonvulsant activity by decreased duration of tonic extension phase of the animals but not with CHSA. In PTZIC, SIC PIC, IIC and 4-APMIC models, a diazepam exhibited anticonvulsant effect, the CHSA was ineffective among all those paradigms. Increased GABA level in the mice serum was observed with a gabapentin (20 mg/kg) treated group, in CHSA such effect was not observed. Hence it concluded that Semecarpus anacardium (Linn.) not possesses sedative and anticonvulsant...
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Posted by admin on Jun 1, 2011 in |
The root of Heliotropium indicum is reported to have good medicinal values in traditional system of medicines. Commonly called as Indian Turnsole, is a herb with slightly woody at base. It is distributed in the tropical and temperate regions of the world and found throughout India The present study deals with phytochemical investigations of Heliotropium indicum root including determination of loss on drying(3.8%), Ash values{total ash(6.3%), acid insoluble ash(3.5%), water soluble ash(3.2), sulphated ash(6%)} and extractive values{water soluble extractive(21%), alcohol soluble extractive(2%), benzene soluble extractive(1.5%), Petroleum Ether soluble Extractive(2.1%)}. The preliminary phytochemical screening of powdered drug was also carried out. The qualitative chemical examinations revealed the presence of various phytoconstituents like alkaloids, carbohydrates, phytosterols, tannins and saponin in the root extracts through the chromatographic separation technique i.e. TLC . These observations therefore support the use of Heliotropium indicum in herbal cure remedies. Alkaloids which are one of the largest groups of phytochemicals in plants have amazing effects on humans and this has led to the development of powerful pain...
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Posted by admin on Jun 1, 2011 in |
A new series N-(2-(4-substituted Phenyl)-4-oxothiazolidin-3-yl)isonicotin- amide of derivatives were synthesized by the reaction of Schiff base (isoniazid and substituted benzaldehyde) with mercaptoacetic acid. The chemical structures of the synthesized compounds were confirmed by means of IR, 1H-NMR. The synthesized compounds showed good antibacterial activity against Staphylococcus aureus and Escherichia...
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