Posted by admin on Sep 1, 2012 in |
Lipid-based drug delivery systems in the form of triglyceride emulsions, micellar systems and liposomes have been used for parenteral administration for the last few decades. Large number of new chemical entities (NCE) presents formulation and bioavailability problems because of the dose and poor solubility in solvent and co-solvent systems. In addition, high drug concentrations can lead to irritation and pain at the site of injection. There is an increasing interest to expand the range of targetable lipid based systems to solubilize a wide variety of drugs, to improve stability, ease of processing and manufacture in a sterile form. New class of parenteral lipid based drug delivery system includes Tocol emulsions, solid lipid nanoparticles and nanosuspensions, sterically stabilized phospholipid micelles, lipid micro-bubbles and lipoprotein drug carriers. This review article covers the challenges faced by the formulation scientist at each stage of product development of lipid based drug delivery...
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Posted by admin on Sep 1, 2012 in |
The present study was undertaken to investigate in-vitro antioxidant activity of aqueous and hydroalcoholic extract of whole plant of Bacopa monnieri Linn. Family- Scrophularaceae. The total Phenolic content was determined using folin ciocalteau method while the total flavonoid content was determined using aluminium chloride method. In vitro antioxidant activity was evaluated using the Reducing power assay, Hydrogen peroxide scavenging assay, nitric oxide scavenging activity, superoxide scavenging activity and hydroxyl radical scavenging activity. The hydroalcoholic extract had more phenol concentration (116.1 mg/g of extract) when compared to aqueous extract (58 mg/g of extract). The flavonoid content was more in hydroalcoholic extract (242.6 mg/g of extract) when compared to that of aqueous extract (202.8 mg/g of extract). The reducing power and hydrogen peroxide scavenging of the extract was found to be concentration dependent. The nitric oxide scavenging activity, superoxide scavenging activity and Hydroxyl radical scavenging activity was also concentration dependent with IC50 value being 254.70 µg/ml , 934.06 µg/ml and 510.60 µg/ml respectively for Aqueous extract and 169.22 µg/ml, 495.83 µg/ml,...
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Posted by admin on Sep 1, 2012 in |
Tizanidine is a muscle relaxant agent, with the half life of 2.5 hours and requires daily doses to maintain adequate plasma concentrations. The present study was undertaken to with an aim to formulation development and evaluation of Tizanidine hydrochloride sustained release tablets using hydrophilic polymer to sustain the action of Tizanidine. Different batches of Tizanidine hydrochloride were prepared based on preformulation studies using HPMC K100M HPMC K4M and HPMC K100 having different viscosities to calculate the sustained release properties. Tizanidine hydrochloride was analysed by using HPLC using wavelength 240 nm. Results of in-vitro study indicate that the trial formulation 5 having considerable sustaining property. From the discussion it is concluded that the trial formulation 5 had considerable in-vitro drug release. Trial formulation 5 can be taken as an ideal or optimized formulation of sustained release tablets for 12 hours release and it fulfils all the requirements for...
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Posted by admin on Sep 1, 2012 in |
Objective: To determine the effect of amlodipine on blood glucose levels through oral glucose tolerance test in normoglycemic albino Rats and the magnitude of its effect on basal v/s glucose induced glycemic value compared to control. Methods: Rats were divided into control and test groups to study the effect of glucose induced glycemic changes in normal rats following oral administration of amlodipine. The control group received 1 ml of distilled water everyday, test group received amlodipine everyday in the dose of 1.5 mg/Kg BW for 3 days.On the third day, 2 hours after drug administration both groups were administered oral glucose in the dose of 0.6 gm/Kg BW. The blood glucose levels were measured at 0, 60 and 150 minutes after glucose administration by rat tail snipping method using ACCUCHEK glucometer. Results: The mean CBG of Test group is significantly higher(P<0.001) at all times of the glucose challenge i.e. 0, 60, 150 minutes from the time of glucose administration compared to control group. The optimal hyperglycemia was seen at...
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Posted by admin on Sep 1, 2012 in |
A new specific, selective and inexpensive spectrofluorophotometric method has been developed for determination of Nelfinavir mesylate in bulk drug and its dosage form. Fluorescence spectrum of Nelfinavir mesylate in methanol showed excitation wavelength at 253 nm and emission wavelength at 508 nm. The calibration curve for Nelfinavir mesylate was found to be linear over the concentration range of 100-225 ng/mL with correlation coefficient of 0.988 for bulk drug. Limit of detection and limit of quantification were found to be 8.42 ng/mL and 28.09 ng/mL respectively. Method was validated as per ICH guidelines and found to be suitable for estimation of Nelfinavir from bulk drug and its pharmaceutical dosage...
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