Rana Al-Shaikh Hamid, " Evaluation of Three Chitin Metal Silicate Co-precipitates as a Potential Multifunctional Single Excipient in Tablet Formulations " , "Marine Drugs",Vol.8,No.1660-3397, , , 10/25/2010
The performance of the novel chitin metal silicate (CMS) co-precipitates as a
single multifunctional excipient in tablet formulation using direct compression and wet
granulation methods is evaluated. The neutral, acidic, and basic drugs Spironolactone
(SPL), ibuprofen (IBU) and metronidazole (MET), respectively, were used as model drugs.
Commercial Aldactone®, Fleximex® and Dumazole® tablets containing SPL, IBU and
MET, respectively, and tablets made using Avicel® 200, were used in the study for
comparison purposes. Tablets of acceptable crushing strength (>40 N) were obtained using
CMS. The friability values for all tablets were well below the maximum 1% USP tolerance
limit. CMS produced superdisintegrating tablets (disintegration time < 1 min) with the
three model drugs. Regarding the dissolution rate, the sequence was as follow:
CMS > Fleximex® > Avicel® 200, CMS > Avicel® 200 > Dumazole® and Aldactone® >
Avicel® 200 > CMS for IBU, MET and SPL, respectively. Compressional properties of
formulations were analyzed using density measurements and the compression Kawakita
equation as assessment parameters. On the basis of DSC results, CMS co precipitates were
found to be compatible with the tested drugs. Conclusively, the CMS co-precipitates have
Mar. Drugs 2010, 8
the potential to be used as filler, binder, and superdisintegrant, all-in-one, in the design of
tablets by the direct compression as well as wet granulation methods.
Faisal Al-Akayleh, M, " Formulation and In vitro assessment of sustained release terbutaline sulfate tablet made from binary hydrophilic polymer mixtures. " , "Pharmaceutical Development and Technology",Vol.4,No.5, Informa Healthcare, London, 10/06/2011
In the present systematic study, a sustained release of terbutaline sulfate tablet (TBS) was developed and optimized by employing the hydrophilic polymers; chitosan and xanthan gum mixed with sodium bicarbonate as a release modifying agent. This formulation was developed using direct compression technology. In vitro release studies indicated rapid swelling and drug release in the initial period of the acid stage from a matrix composed of chitosan and xanthan gum solely. Addition of sodium bicarbonate to the matrix resulted in sustained drug release. Various formulation factors such as polymer to polymer ratio, polymer viscosity and particle size were altered and their effect on dissolution pattern was illustrated. Manufacturing variables such as compression force and lubricant percentage were investigated and found not to influence the drug release profile of the resulted tablets. The release mechanism follows Korsmeyer-Peppas equation with n value indicating non-Fickian diffusion. The release profiles were analyzed using statistical method (one-way ANOVA) and f(2) metric values and found to be similar to the commercial product Bricanyl(®). Reproducible data were obtained when scale-up of the formulation was performed.
Rana Al-Shaikh Hame, " EVALUATION OF CHITIN METAL SILICATE CO PRECIPITATES AS POTENTIAL MULTIFUNCTIONAL EXCIPIENTS IN TABLET FORMULATIONS " , "",Vol.,No., , , 06/15/2010
Ruaa Al-Ajeeli, Dr. , " Formulation and in Vitro/ in Vivo Evaluation of In-Situ Gel Matrix System for Sustaining the Release of Paractamol " , "",Vol.,No., , , 01/15/2010