Asian Journal of Research in Pharmaceutical Sciences

Soujanya Kumari ¹, Ravi Kumar ², Yamunappa ¹, Pooja Shetty ¹, Prathibha Suvarna ¹, V. B. Narayana Swamy ³

Affiliations
1 Karavali College of Pharmacy, Mangalore, IN
2 Department of Pharmaceutics, Karavali College of Pharmacy, Mangalore, IN
3 Department of Pharmacognosy, Karavali College of Pharmacy, Vamanjoor, Mangalore, IN

Abstract

The present investigation concerns the formulation and evaluation of gastro retentive matrix tablets of sitagliptin which after oral administration, are designed to prolong the gastric residence time, increase drug bioavailability and sustain the drug release. The tablets were prepared by using various polymers viz; HPMC (K4M, K15 M, K100M), xanthan gum and combination of polymers and sodium bicarbonate. The tablets were prepared by wet granulation method and further evaluated for pre compression parameters, physical characteristics, in vitro release, buoyancy time, lag-time and swelling index. Formulations were evaluated for in vitro buoyancy and drug release study using United States Pharmacopeia (USP) 23 paddle-type dissolution apparatus using 0.1 N HCl (pH 1.2) as a dissolution medium. All formulations had floating lag times below 3 minutes and constantly floated on dissolution medium for more than 12 hrs. The optimized formulations (F13) were subjected to various kinetic release investigations and it was found that the mechanism of drug release was predominantly diffusion in combination with polymeric relaxation. The best formulation (F13) remained buoyant and showed a sustained drug release (98%) for 12hrs. F13 showed no significant change in physical appearance, drug content or floating lag time after storage at 45°C/75% RH for three months.

Keywords

Sitagliptin, Floating Drug Delivery System, Hydrocolloids, Gastric Residence Time, Buoyancy.

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Monirul Islam ¹, J. Ramanjaneyulu ¹, D. Veeresh Babu ¹, Mohibul Hoque ¹, V. B. Narayana Swamy ²

Affiliations
1 Department of Pharmacology, Karavali College of Pharmacy, Mangalore, IN
2 Department of Pharmacognosy, Karavali College of Pharmacy, Mangalore, IN

Abstract

In recent decades, it has become one of the principal pillars of a branch of science called cognitive neuroscience, an interdisciplinary link between cognitive and neuroscience. The objective of this to investigate the neuropsychological effect of a polyherbal formulation Bravobol on learning and memory processes in mice by elevated plus maze and Morris water maze model. Bravobol contains Evolvulus alsinoids (Shankhpushpi), Bacopa monnieri (Brahmi), Withania somnifera (Ashwagandha), Celastrus paniculatus (Malkangani) and Abhrak bhasma. Its effect (250, 500, and 750 mg/kg, p.o.) was tested on learning and memory processes. Activity of Bravobol on acquisition and retention was studied using elevated plus maze model (EPM) and spatial memory using Morris water maze model (MWM) in mice. The results were compared with the vehicle-treated group. Administration of Bravobol (250, 500 and 750 mg/kg, p.o) showed significant reduction in transfer latency in EPM and escape latency in MWM as compared to the control group. Bravobol may act as a memory enhancer formulation and may also be useful as a supportive adjuvant in the treatment of Alzheimers disease.

Keywords

Polyherbal Formulation, Elevated Pluz Maze, Moriss Water Maze.

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