Pharmaceutics Articles

About Authors:
Abdulrhman A. Akasha
Department of Pharmaceutics, Faculty of Pharmacy,
Tripoli University, Libya-13645
akashaabdu@yahoo.co.uk

Abstract
Bioerodible microspheres may provide a vehicle for achieving good aerosolisation characteristics, whilst offering a slow release depot from the pulmonary deposited fraction.  Polysebasic anhydride (PSA) was synthesised by a melt-polycondensation process using nitrogen gas under high vacuum. The products were characterised by ¹H-NMR (2 & 20 KDa) and DSC (melting point: 68 & 83 ^°C), and with a yield (81 & 89 %) of prepolymer and polymer respectively. The polyanhydride was converted into microspheres using an oil in oil emulsification procedure.  The polymer was dissolved in dichloromethane and using 1 to 5% Span 85 or oleic acid as stabilizer, dispersed into silicone oil. The dichloromethane was removed by evaporation, the microspheres recovered and washed with petroleum ether. Laser diffraction analysis of the microspheres indicated a mean microspheres size <5 mm.  The presence of rough non-porous spheres was demonstrated by SEM.  Initial in vitro experiments were undertaken to examine the degradation rate in 0.1 M phosphate buffer at 37 ^°C, pH 7.4.  The process was followed for 24 hr, by which time 73% of the microsphere mass had eroded. However release of salbutamol base occurred more rapidly with 95% lost within 6-10 hr. The fact that 74% was released in the first 10 min suggest a high fraction of surface adsorbed drug. Microcarrier systems for slow release may provide a vehicle for achieving good aerosolisation characteristics, whilst offering a slow release depot from the pulmonary deposited fraction. The produced rough and non-porous microspheres containing salbutamol base were subjected for Deposition process using Andersen Mark II Cascade Impactor. The Deposition was assessed from both a Spinhaler and Rotahaler after 5s activation at a flow rate of 28.3L/min.  This resulted in an average of 33.5% (Rotahaler and 17.5% (Spinhaler) of the dose found between stages 2 and the filter corresponding to microspheres in the size range 4.7 to 0.4 mm.

About Authors:
*Thoriya J. G, Patel S. D, Tank H. M
Matushree V. B. Manvar College of Pharmacy- Dumiyani,
Rajkot
*thoriya.jignesh@gmail.com

ABSTRACT
Pioglitazone HCl is used for the management of type-2 diabetes. It is an absorption window limited drug, whose solubility decreases with increase in the pH and has a short half life of 3-7 h. Here an attempt is made to developed the floating matrix tablets, which design in way that after oral administration the GI resistant time is  prolonged and thus to give sustained action with increase in the bioavailability of the drug. Pioglitazone HCl showed maximum absorption at wavelength 269 nm in 0.1N HCl. various formulations were developed by using release rate controlling and gel forming polymers like HPMC, and Carbopol-934 in single and combinations by direct compression method with the incorporation of sodium bicarbonate as gas generating agent. The prepared tablets were characteristics by drug content, floating property, swelling and in vitro dissolution test using USP dissolution test apparatus Type – II (paddle method) in dissolution medium of 0.1 N HCl. The in vitro dissolution results of all tablets were computed by using dissolution software. The prepared tablets were found to be good hardness, diameter, weight variation, thickness, friability drug content, floating property and in vitro drug release. Drug-polymer compatibility studies by FTIR gave conformation about drug purity and showed no interaction between drug and selected polymers. All the formulations had floating lag time below 3 minutes and constantly floated on dissolution medium for more than 12 h. Swelling studies indicated significant water uptake and contributed in drug release. From among all the developed formulations, as F7 prolonged the drug release (95.45 %) for longer period of time (12 hrs.); they were selected as best formulations. The best formulations were found to be stable during stability studies for two months. Thus, selected formulations satisfied floating time, swelling index and in vitro drug release profile requirements for a floating drug delivery system.Tablets of Pioglitazone HCl prepared with HPMC K4M, HPMC K100M and Carbopol 934P were found to be acceptable floating property, water uptake and in vitro drug release.

About Authors:
Deepak Sharma*, Arunabha Banik, S k Gupta
Department of Pharmaceutical Technology,
MIET,Meerut
*thakraan.southcarolina@gmail.com

ABSTRACT
The Microspongesdelivery system are extremely small, inert,indestructibleclusters of even tinierspherical particles of microscopic sizepatented polymeric delivery systems consisting of porous microspheres that can entrap a wide range of active ingredients such as emollients, fragrances, essential oils, sunscreens, and anti-infective, anti-fungal, and anti-inflammatory agents and are very well tolerated, and highly efficacious, novel productsthat do not pass through the skin, capable of holding four times their weight in skin secretionsand can absorb skin secretions. Like a true sponge, each microspheres consists of a myriad of interconnecting voids within a non-collapsible structure with a large porous surface. The size of the microsponges can be varied usually from 5-300µm in diameter, depending upon the degree of smoothness or after-feel required for the end formula. Although the microsponge size may vary, a typical 25µm sphere can have up to 250000 pores and an internal pore structure equivalent to 10ft in length providing a total pore volume of about 1ml/g. This results in a large reservoir within each microsponge, which can be loaded with up to its own weight in active agent. The microsponge particles themselves are too large to be absorbed into the skin and this adds a measure of safety to these microsponge materials. Another safety concern is the potential bacterial contamination of the materials entrapped in the microsponge. Because the size of the pore diameter is smaller than bacteria, ranging from 0.007 to 0.2µm, bacteria cannot penetrate into the tunnel structure of the microsponges.The microsponge system can prevent excessive accumulation of ingredients within the epidermis and the dermis. Potentially, the microsponge system can reduce significantly the irritation of effective drugs without reducing their efficacy.

About Authors:
Kalpen N. Patel*, Maulika S. Patel, Divya Thakkar, Manan Patel, Kaushal Raval
Shree Krishna Institute of Pharmacy, Shankhalpur,
Bechraji, Mahesana, Gujarat, India.
*kalpenpharma@gmail.com

ABSTRACT
Sustained releases tablets have been used for reduced the dosing frequency and maintain the plasma drug concentration level within narrow therapeutic range. Aspirin used as antiplatelate agent and Atorvastatin is HMG-CoA reductase inhibitor which lowers the plasma concentration of cholesterol. Here in present study sustained release tablets of Aspirin and Atorvastatin prepared by using cellulose acetate phthalate (CAP) and microcrystalline cellulose (MCC) as a polymers. The sustain release tablet of Aspirin And Atorvastatin were prepared by wet granulation method and were substituted for film coating to mask the spotting from Atorvastatin and for protection from light. From the dissolution profile of F2B2 gives controlling the release up to 12 hrs with required value i.e. - 55.85 % for Aspirin and 54.78 % for Atorvastatin in 4 hrs respectively and 100.70 % for Aspirin and 100.60 % for Atorvastatin in 12 hrs respectively. The result of stability studies of batch F2B2 indicate that it is stable at 400C / 75 % ±0.5 % relative humidity as there was no significant differences observe for dissolution and average drug content data after two months.

About Authors:
Aadeshkumar*, Nishantkumar gupta, Dineshkumar gupta
Dept. of pharmacy
BIT meerut, UP
*adesh.adi.chaudhary@gmail.com

ABSTRACT
In recent years there has been a rapid increase in nanotechnology in the fields of medicine and more specifically in targeted drug delivery. The proprietary powder processing techniques use by nanotherapeutics improves the delivery of drug that can not normally taken orally.
It improves
·         Safety and efficacy of low molecular weight drugs,
·         Stability and absorption of proteins that normally cannot be taken orally,
·         Extend the life cycle of existing drug formulation.

At present many substances are under investigation for drug delivery and more specifically for cancer therapy, AIDS and potential to cross the Blood Brain Barrier (BBB) has open new ways for drug delivery into the brain. Pharmaceutical sciences are also using nanoparticles to reduce toxicity and side effects of drugs. Nanoparticles are also have the potential as novel intravascular or cellular probes for both diagnostic and therapeutic purposes (drug/gene delivery) and nanosize allow access into cell and cell compartment including nucleus. . Discovery of nanomedicine has given rise to nanoparticles through which better target specific drug and gene delivery is possible. In conclusion nanoparticles for drug delivery and imaging have gradually been developed as new modalities for cancer therapy and diagnosis. This review illustrates the emerging role of nanotechnology in drug delivery.

About Author:
Patel Chirag J*, Asija Rajesh, Asija Sangeeta, Mangukia Dhruv
Maharishi Arvind Institute of Pharmacy,
Department of pharmaceutics, Jaipur,
Rajasthan, India.
*chirag.bangalore@gmail.com

ABSTRACT
Amongst the various carriers, few drug carriers reached the stages of clinical trials where liposome shows strong potential for effective drug delivery to the site of action. Liposomes are vesicles having concentric phospholipid bilayers. Molecules from low molecular weight to high molecular weight have been incorporated in liposomes. The water soluble compounds/drugs are present in aqueous compartments while lipid soluble compounds/drugs and amphiphilic compounds/drugs insert themselves in phospholipid bilayers. Drug encapsulated in liposomes include doxorubin, cisplatin, vincristin, melphalan, sarcolycin, daunorubicin, etoposide, etc. The liposomes containing drugs can be administrated by many routes (intravenous, oral inhalation, local application, ocular) and these can be used for the treatment of various diseases. Their predominance in drug delivery and targeting has enabled them to be used as therapeutics tool in fields like tumour targeting, gene and antisense therapy etc. This review discusses the advantages, disadvantages, mechanism, classification, method of preparation, characterization and application of liposomes.

About Authors:
SHARMA AKANSHA*, AGRAWAL SHIKHA
SWAMI VIVEKANAND COLLEGE OF PHARMACY
KHANDWA ROAD INDORE (M.P.)
*akansha.sharma@mylan.in

ABSTRACT :
The main aim for performing this project is to increase the bioavailabilty of lamotrigine as well as its onset of action to control the seizures that occur during the epileptic attack. To serve this purpose we will use mucilage of oscimum basilicum as a natural superdisintegrant & later comparing it with different novel synthetic superdisintegrant. By preparing a rapid disintegrating tablet of lamotrigine, rapid action of same can be achieved easily.
As we know that superdisintegrant plays the major role in rapid disintegration of tablet, thus it is very important to select a right or correct superdisintegrant in all respect which fulfill its purpose without effecting other parameters of tablet formulation and gives quicker and better result, when the number of formulation with different combinations of superdisintegrants (Natural & Synthetic) will be made then it would become very easy to evaluate and get the formulation with maximum desirable results.Lamotrigine being a poorly water soluble drug, needs modification to make them water soluble.

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.