Shri Sarvajanik Pharmacy College

About Authors:
Jigar Modi^*1, Dr. Jayvadan Patel¹, Dr. Hitesh chavda^2
1Nootan Pharmacy College, S.P. Sahkar Vidhyadham,
Kamana Crossing, Visnagar-384 315,
Dist – Mehsana, Gujarat, India.
²Shri Sarvajanik Pharmacy College,
Nr. Arvind Baug, Mehsana, Gujarat, India
*jigo_farmacy@yahoo.com

ABSTRACT:
Generally, controlled release dosage forms used in many applications. Superporous hydrogel is also one of them. It has lot of advantages over conventional hydrogel. Superporous hydrogel having faster swelling due to interconnected highly porous structure. Such other properties like slippery property, their mechanical strength and better foaming process are advantageous over conventional hydrogel. Its unique mechanism for achieving gastric retention, a number of hurdles have to be overcome for any approach to be clinically useful. For example, intra-gastric floating systems require the presence of gastric juice to be effective, and this may not be the case in the fasted state. Mucoadhesive systems can easily lose their mucoadhesive properties by interaction with any materials soluble in gastric juice. In this review, types of superporous hydrogel, their preparation, their characterizations and applications are discussed.

About Author:
D. J. Kalena^*, C. N. Patel
Department of Quality Assurance,
Shri Sarvajanik Pharmacy College,
Near arvind baug, Mehsana - 384 001, Gujarat, India

A simple, precise, accurate and rapid high performance thin layer chromatographic method has been developed and validated for the simultaneous estimation of atorvastatin calcium and olmesartan medoxomil in combined dosage forms. The stationary phase used was TLC aluminium plate precoated with silica gel 60F₂₅₄. The mobile phase used was a mixture of acetonitrile: chloroform: methanol: 10% glacial acetic acid (7: 2: 1.5: 0.1 v/v/v/v). The system was found to give compact spot for both atorvastatin and olmesartan (R_f value 0.5±0.01 and 0.76±0.02 respectively). The densitometric analysis of spot was carried out in reflectance mode at 253 nm. The method was validated in terms of linearity, specificity, precision, robustness and accuracy. The calibration curve was found to be linear in the range of 200 to 800 ng/spot for atorvastatin and 400 to 1600 ng/spot for olmesartan. The limit of detection and the limit of quantification for the atorvastatin were found to be 178.239 and 540.11 ng/spot and for olmesartan 40.10 and 121.51 ng/spot, respectively. The proposed method can be successfully used to determine the drug content of marketed tablet formulation.