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Trefi, Saleh
- Preparation of Gatifloxacin Microparticles by Double Emulsification W/O/W Method for Ocular Drug Delivery:Influence of Preparation Parameters
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Authors
Affiliations
1 Department of Pharmaceutical Chemistry and Quality Control, Aleppo University, SY
2 Department of Pharmaceutical Chemistry and Quality Control, Alandalus University, SY
3 Department of Pharmaceutical Technology, Aleppo University, SY
1 Department of Pharmaceutical Chemistry and Quality Control, Aleppo University, SY
2 Department of Pharmaceutical Chemistry and Quality Control, Alandalus University, SY
3 Department of Pharmaceutical Technology, Aleppo University, SY
Source
Research Journal of Pharmacy and Technology, Vol 10, No 5 (2017), Pagination: 1277-1288Abstract
The purpose of the present study was to prepare microparticles containing Gatifloxacin suitable for ocular drug delivery. Polycaprolactone microparticles were prepared using the double emulsion (water-in-oil-in-water) solvent extraction/evaporation method. Two different modified methods were applied and the influence of their preparation parameters on the final microparticles properties was studied in an attempt to control particle sizes and encapsulation efficiency. By adjusting formulation and process parameters, we uncovered that using of 3% (w/v) PVA as emulsion stabilizer in the internal aqueous phase (first studied process) facilitated microparticles (77% of particles more than 100μm in size) which is suitable for oral drug delivery, but with highest entrapment efficiency EE% (82.12%). Whereas introducing 5% (w/v) of PVP as stabilizing agent and 5% (w/v) of NaCl as osmotic balancer in the external aqueous phase (second studied process) afford microparticles which is optimal in size for ophthalmic drug delivery (95% of particles less than 25μm in size) with an acceptable EE% (30.18%).The later result demonstrated that, this colloidal system could be developed in order to use as drug carriers for ocular drug delivery, which offers several advantages including longevity, stability and bioavailability of encapsulated drug. Moreover, it seemed to be applicable for sustained ocular drug delivery allowing minimizing dose repetition to reduce systemic side effects and enhance patient compliance.Keywords
Gatifloxacin, Microparticles, Ocular Drug Delivery, Double Emulsion, PCL, PVA, PVP.- Separation and Quantification of Sacubitril-Valsartan Combination in Tablets by a New Ion-pair HPLC
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Authors
Affiliations
1 Pharmaceutical Quality and Pharmaceutical Chemistry Department-University of Aleppo, SY
2 Laboratoire SPCMIB (UMR CNRS 5068), Université Paul Sabatier, Université de Toulouse, 118 route de Narbonne, 31062 Toulouse cedex, FR
1 Pharmaceutical Quality and Pharmaceutical Chemistry Department-University of Aleppo, SY
2 Laboratoire SPCMIB (UMR CNRS 5068), Université Paul Sabatier, Université de Toulouse, 118 route de Narbonne, 31062 Toulouse cedex, FR
Source
Research Journal of Pharmacy and Technology, Vol 12, No 3 (2019), Pagination: 1017-1022Abstract
The objective of this study was to develop and validate a new ion-pair reversed phase high performance liquid chromatographic method on a standard C18-type stationary phase with UV detection for the analysis of the recent two-drugs combination sacubitril/valsartan in tablets. The mobile phase consisted of a mixture of 45% of 10-3 M of cetyltrimethylammonium bromide (cetrimide) as the ion-pairing agent and 55% acetonitrile. The method validation was based on linearity, accuracy, precision, robustness and specificity. This method exhibits good linearity and accuracy with mean recovery values between 95.0-105.0%, precision with relative standard deviations of the calculated concentrations less than 5.0% and specificity in the presence of degradation products. These results indicates that the proposed method is simple and applicable for the separation and determination of sacubitril, valsartan combination in tablets and could be a relevant method to implement in quality control laboratories.Keywords
HPLC, Ion Pair Liquid Chromatography, Sacubitril, Valsartan.References
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- Determination of Dimenhydrinate and Chlorpheniramine Maleate in Pharmaceutical Forms by new Gas Chromatography Method
Abstract Views :171 |
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Authors
Affiliations
1 Pharmaceutical Quality and Pharmaceutical Chemistry Department – University of Aleppo, SY
2 Organic Chemistry Department– University of Al-Hawash, SY
1 Pharmaceutical Quality and Pharmaceutical Chemistry Department – University of Aleppo, SY
2 Organic Chemistry Department– University of Al-Hawash, SY
Source
Research Journal of Pharmacy and Technology, Vol 12, No 6 (2019), Pagination: 2851-2856Abstract
A specific and highly sensitive gas chromatographic method was developed for the simultaneous determination of chlorpheniramine maleate and dimenhydrinate using one drug as internal standard for the other one. The chromatographic conditions are aTRB-5-625 capillary column (60m × 0.25 mm i.d0.25μm film thickness) and nitrogen as a carrier gas at a flow rate of 1.0 mL min. The oven temperature was programmed at 230°C for 1 min, with a rise of 20°C min up to 250°C (held for 7 min). The injector and detector port temperatures were maintained at 290°C. Detection was carried out using flame ionization detector. Results of assay and recovery studies were statistically evaluated for its accuracy and precision using one drug as internal stander for the other one and vice versa. Objective: The objective of this study was to develop and validate a gas chromatographic method to separate and assay to antihistamine drugs, dimenhydrinate and chlorpheniramine maleate in pharmaceutical forms. This method was a practical additional choice in quality control laboratories.Keywords
Chlorpheniramine Maleate, Dimenhydrinate, Gas Chromatography.References
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