Research Journal of Pharmaceutical Dosage Form and Technology

D. S. Saindane ¹, A. S. Kulkarn ², A. N. Sagri ², R. B. Pimprikar ³, S. B. Yeshwante ³, C. P. Suryawanshi ³, S. D. Firke ⁴, M. K. Kale ⁴

Affiliations
1 Dept. of Pharmaceutical Chemistry, Govt. College of Pharmacy, Karad, (M.S.), IN
2 Department of Pharmaceutical Chemistry, Govt. College of Pharmacy, Karad, (M.S.), IN
3 Gangamai College of Pharmacy, Nagaon, Dhule, (M.S.), IN
4 KYDSCT's College of Pharmacy, Sakegaon, Tal. Bhusawal, Dist. Jalgaon (M.S.), IN

Abstract

This study compares the physicochemical properties of cefixime (CFX) solid dispersions prepared by freeze drying method. Solid dispersions of cefixime in poloxamer 188 were prepared and characterized by intrinsic dissolution, powder X-ray diffraction, Fourier transform infrared spectroscopy and Scanning electron microscopy. CFX:Poloxamer 188 solid dispersions showed increased dissolution rate than pure CFX. The Infrared spectroscopic studies showed interaction between CFX and Poloxamer 188 in solid dispersions. The scanning electron microscopy studies showed decrease in particle size of binary system as compared to particle of pure drug. The amorphous state of CFX coupled with presence of interaction between drug and Poloxamer 188. However, the antimicrobial activity of CFX was increased significantly by Poloxamer 188 against S. aureus and E. coli. The solid dispersion technique of CFX:Poloxamer 188 binary system provides a promising way to increase the solubility and dissolution rate of poorly soluble drugs.

Keywords

Cefixime, Solid Dispersion, Poloxamer 188, Freeze Drying, Dissolution Rate, Binary System.

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M. D. Patil ¹, R. V. Keny ², R. B. Pimprikar ³, S. B. Yashwante ³, D. S. Saindane ³, S. K. Mandlik ², Mujawar Tabrej ³, M. K. Kale ⁴, B. M. Firke ⁴

Affiliations
1 255- Shramsafalya, Niwas, Janta Park, Navapur, Dist. Nandurbar, MS, PIN- 425418, IN
2 Government College of Pharmacy, Goa, IN
3 Gangamai College of Pharmacy, Nagaon, Dhule(M.S.), IN
4 KYDSCT's College of Pharmacy, Sakegaon, Tal. Bhusawal, Dist. Jalgaon, (M.S.), IN

Abstract

The effect of molecular weight of polyethylene glycols (PEGS) and drug/PEG ratio on the structure and dissolution rates of the solid dispersions with Telmisartan have been examined. Telmisartan (TEL) was chosen as a model drug due to its poor and pH dependent water solubility. The alkalizer used to modify the pH of TEL was NaOH, in the SD system significantly increased the drug dissolution rate in gastric fluid (pH 1.2) . Structural change in drug crystallinity to an amorphous form was also a contributing factor based on differential scanning calorimetry (DSC) thermograms and powder X-ray diffraction (PXRD) patterns. The drug frequency of the C=O band decreased and the O–H broad band in the Fourier transform infrared (FTIR) spectra disappeared when this alkalizer was added. It was evident that the alkalizer in PEG 6000 based SDs synergistically enhanced dissolution of TEL not only by modulating pH but also by changing drug crystallinity to an amorphous form via molecular interactions.

Keywords

Telmisartan (TEL), Solid Dispersion (SD), Alkalizer, Hot Melt Method.

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