Solid Dispersions of Flufenamic Acid with Peg 4000 and Peg 6000
نویسندگان
چکیده
Non-steroidal anti-inflammatory drugs have an important impact in the actual medicinal therapy, having indications in covering the range from rheumatic inflammations to cardio-vascular, genito-urinary and stomatological diseases. Flufenamic acid is a nonsteroidal anti-inflammatory drug, from the class of fenamates. It exhibits poor aqueous solubility, accordingly the aim of this study was to enhance flufenamic acid water solubility, through its amorphization using auxiliary substances with macromolecules. Since the preliminary analyses with thermomicroscopy and differential scanning calorimetry (DSC) showed that the flufenamic acid dissolves in the molten polyethylene glycol (PEG), we made solid dispersions of flufenamic acid with PEG 4000 and PEG 6000 through the melting method in 1:5 and 1:10 mass ratio. The solid dispersions were analyzed with DSC, X-Ray Diffraction (XRD) and we made dissolution tests in artificial gastric juice and artificial intestinal juice. Through DSC measurements and thermomicroscopic analysis were verified the amorphization, the dissolution of the flufenamic acid in PEGs. The analysis of the solid dispersions by XRD demonstrates the amorphization of flufenamic acid. The dissolution test shows a 4.4 times better solubility in the artificial gastric juice with the PEG 4000 mixture in 1:10 mass ratio. Rezumat Antiinflamatoarele nesteroidiene ocupă un loc important în terapia actuală, cu indicaţii ce se extind de la afecţiunile inflamatorii reumatismale până la maladiile cardiovasculare, genito-urinare, stomatologice. Acidul flufenamic este un antiinflamator nesteroidian, din grupa fenamaţilor. Este o substanţă greu solubilă în apă, de aceea scopul lucrării a fost creşterea solubilităţii acidului flufenamic, prin amorfizarea lui, cu ajutorul unor substanţe auxiliare cu molecule mari. Întrucât analiza termomicroscopică şi calorimetria cu scanare diferenţială (DSC) preliminară a arătat că acidul flufenamic se dizolvă în polietilen-glicolul (PEG) topit, am preparat dispersii solide cu acid flufenamic şi PEG 4000, respectiv PEG 6000 prin metoda topirii în raporturi de masă 1:5 şi 1:10. Dispersiile solide au fost analizate prin calorimetrie de scanare diferenţială (DSC), difracţie de raze X (XRD) şi au fost făcute testele de FARMACIA, 2011, Vol.59, 1 61 dizolvare în suc artificial gastric şi suc artificial intestinal. Prin măsurători DSC şi analize termomicroscopice a fost pusă în evidenţă amorfizarea, dizolvarea acidului flufenamic în PEG. Analiza dispersiilor solide prin difracţie de raze X demonstrează amorfizarea acidului flufenamic. Pe baza testelor de dizolvare putem constata o creştere de 4,4 ori a solubilităţii acidului flufenamic în suc gastric artificial în cazul amestecului cu PEG 4000 preparat în raport de masă 1:10.
منابع مشابه
Physicochemical characterization and dissolution enhancement of loratadine by solid dispersion technique
−The purpose of this investigation was to enhance the dissolution rate of loratadine using polyethylene glycol 6000 (PEG) solid dispersions (SDs). The solubility behavior of loratadine in the presence of polyethylene glycol 4000 and polyethylene glycol 6000 in water showed linear increase with increasing concentrations of PEG, indicating AL type solubility diagrams. SDs of loratadine with PEG 6...
متن کاملInfluence of the microwave technology on solid dispersions of mefenamic acid and flufenamic acid
The present studies were undertaken to develop solvent-free solid dispersions (SDs) for poorly soluble anti-inflammatory drugs mefenamic acid (MA) and flufenamic acid (FFA) in order to enhance their in vitro dissolution rate and in vivo anti-inflammatory effects. The SDs of MA and FFA were prepared using microwaves irradiation (MW) technique. Different carriers such as Pluronic F127® (PL), Eudr...
متن کاملA Modified Solvent Method for Preparation of Solid Dispersions
The first aim of the present investigation was to prepare solid dispersions to improve the dissolution properties of oxcarbazepine and quetiapine using PEG 6000 as a carrier with the help of two methods of preparations viz. spray drying and modified solvent method, and to compare the two methods. The second objective was to apply the modified solvent method for preparation of sustained re...
متن کاملFormulation and Characterization of Solid Dispersions of Glimepiride through Factorial Design
In order to enhance in vitro dissolution and content uniformity of poorly soluble drug glimepiride by preparing solid dispersions using modified solvent fusion method, solid dispersions of drug were prepared by modified fusion solvent method using PEG 6000 and PVP K25 (as carrier). Eight batches (F1-F8) were prepared by Factorial design (23) by taking three ...
متن کاملSolubility of Selected Derivatives
Pharmaceutical availability of diazepam, oxazepam and nitrazepam from solid dispersions of PEG 6000 have been studied in comparison with corresponding physical mixtures and pure benzodiazepines. Selected derivatives of 1,4-benzodiazepin-2-one are poorly water soluble drugs. The aim of this work was to report the properties of diazepamand nitrazepam-PEG 6000 solid dispersions. Differential scann...
متن کامل