scholarly journals Gastro-Retentive as Most Promising Drug Delivery System

Author(s):  
Lankalapalli Srinivas ◽  
Sagar Shanti

The aim of any research work is to find the complications associated with the drug or formulation and find the conclusion of what can be the best possible way to solve them. It has been observed that drugs with short half-life, pH-dependent solubility and having absorption window in upper part of GIT forms good drug candidate for gastro retentive system. Since the formulation reside at a particular site and releases the drug in a controlled manner. In this review article, we have focussed on a thorough understanding on the gastric region, which helped in selecting drugs, various types of gastro retentive systems, new outcomes from recent literature, and important evaluation parameters to attain formulation objective and various marketed products available.

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 673 ◽  
Author(s):  
Ioannis Partheniadis ◽  
Ioannis Nikolakakis ◽  
Ivo Laidmäe ◽  
Jyrki Heinämäki

Electrospinning (ES) is a convenient and versatile method for the fabrication of nanofibers and has been utilized in many fields including pharmaceutical and biomedical applications. Conventional ES uses a needle spinneret for the generation of nanofibers and is associated with many limitations and drawbacks (i.e., needle clogging, limited production capacity, and low yield). Needleless electrospinning (NLES) has been proposed to overcome these problems. Within the last two decades (2004–2020), many research articles have been published reporting the use of NLES for the fabrication of polymeric nanofibers intended for drug delivery and biomedical tissue engineering applications. The objective of the present mini-review article is to elucidate the potential of NLES for designing such novel nanofibrous drug delivery systems and tissue engineering constructs. This paper also gives an overview of the key NLES approaches, including the most recently introduced NLES method: ultrasound-enhanced electrospinning (USES). The technologies underlying NLES systems and an evaluation of electrospun nanofibers are presented. Even though NLES is a promising approach for the industrial production of nanofibers, it is a multivariate process, and more research work is needed to elucidate its full potential and limitations.


2016 ◽  
Vol 4 (2) ◽  
pp. 01-10
Author(s):  
Shailaja Pant ◽  
Ashutosh Badola ◽  
Preeti Kothiyal

Oral controlled release and site specific drug delivery system has been of great interest in pharmaceutical field to achieve improved therapeutic advantage. Concept of novel drug delivery system arose to overcome certain aspect related to physicochemical properties of drug molecule and the related formulations. Gastro retentive drug delivery system is one of such novel approaches to prolong gastric residence time, thereby targeting site specific drug release in the stomach for local or systemic effects. This approach is useful particularly for the drugs which have narrow absorption window in the upper part of gastro intestinal tract. In this review we have been discussed various approaches of gastro retentive drug delivery system, such as floating and non-floating systems.


Author(s):  
Meenakshi Jassal ◽  
Ujjwal Nautiyal ◽  
Jyotsana Kundlas ◽  
Devendra Singh

One novel approach in this area is GRDDSs (Gastro Retentive Drug Delivery System). GRDDSs can improve the controlled delivery of drugs that have an absorption window by continuously releasing the drug for a prolonged period of time before it reaches its absorption site.The purpose of writing this review was to investigate, compile and present the recent as well as past literatures in more concise way with special focus on approaches which are currently utilized in the prolongation of gastric residence time. These includes floating system, swelling and expanding system, bio/mucoadhesive system, high density system and other delayed gastric emptying devices. The present review addresses briefly about the classification, formulation consideration for GRDDS, factors controlling gastric retention, merits, demerits and applications of gastroretentive drug delivery systems.


Author(s):  
Kaustubh Gavali ◽  
Preeti Karade

Gastro-retentive drug delivery is novel drug delivery system which is emerged for controlled and targeted delivery of drug especially when target site lies in or near the stomach. The drug with absorption window in stomach, locally acting drug in stomach, etc. are the best suitable candidate for this drug delivery system. It can be formulated in various types like floating, expandable & unfoldable, Raft forming, swelling system Bio adhesive, High density system etc. The gastro-retentive form can be used in various dosage forms like tablet, capsule, microsphere, granules, powders, pills and laminated films according to the need. It can be also formulated as single unit and multiple unit dosage form but sometime this gastro-retention is unpredictable due to effect of pH, gastric mobility, effect of food etc. This review mainly focuses on the floating drug delivery its types, polymer used in floating drug delivery and application.


Author(s):  
Korlapati Venkateswara Rao ◽  
V.V. Venkatachalam

Controlled  gastric  retention  of  solid  dosage  form  may  be  achieved  by  the  mechanisms  of  floatation,  muco-adhesion,  sedimentation,  expansion  or  by  a  modified  shaped  system. The purpose of this paper is to review the recent literature and current technology used in the development of gastroretentive drug delivery systems. Oral sustained release gastroretentive dosage forms offer many advantages for drugs having absorption from upper gastrointestinal tract and improve the bioavailability of medications that are characterized by a narrow absorption window. Gastroretention would also facilitate local drug delivery to the stomach and proximal small intestine. So, gastroretention could help to provide greater availability of new products and consequently improved therapeutic activity and required benefits to patients. The purpose of writing the article was to compile the recent literature with special focus on various gastroretentive approaches that have recently become leading methodologies in the field of site-specific orally administered controlled release drug delivery. In particular, bioadhesive, size-increasing and floating drug delivery systems are presented and their major advantages and shortcomings are critically discussed in this review. Thus, gastroretention could help to provide greater availability of new products  and  consequently  improved  therapeutic  activity  and  substantial  benefits  to  patients


2020 ◽  
Vol 10 (3-s) ◽  
pp. 43-46
Author(s):  
Dipali Trivedi ◽  
Arti Majumdar ◽  
Neelesh Malviya

Besides enormous improvements in drug delivery, oral route has been highly and effectively utilized route of administration. Floating drug delivery that is also known to be low density system is advancement in the class of gastro-retentive drug delivery system. In the present research work, floating drug delivery of Rilpivirine hydrochloride was developed by overcoming various limitations and troubles associated with the drug including poor absorption in intestinal pH and degradation when comes in contact with higher pH environment. [2] Prepared formulations were evaluated for various parameters like friability, hardness, thickness, drug content analysis, floating properties and in-vitro drug release study. Based on the evaluation, concluded that floating drug delivery system is a non-toxic as well as cost-effective technique for the rationale of enhancing bioavailability and absorption of poorly water soluble drugs. The improvement in gastric residence time is a clear sign. It can be able to use in the future for more acidic soluble drugs to enhance solubility and absorption. Keywords: Floating drug delivery, gastric residence time, Rilpivirine, effervescent, NNRTI.


The review article discusses the possibilities of using fractal mathematical analysis to solve scientific and applied problems of modern biology and medicine. The authors show that only such an approach, related to the section of nonlinear mechanics, allows quantifying the chaotic component of the structure and function of living systems, that is a priori important additional information and expands, in particular, the possibilities of diagnostics, differential diagnosis and prediction of the course of physiological and pathological processes. A number of examples demonstrate the specific advantages of using fractal analysis for these purposes. The conclusion can be made that the expanded use of fractal analysis methods in the research work of medical and biological specialists is promising.


Author(s):  
Neeraj Singh ◽  
Shweta Rai ◽  
Sankha Bhattacharya

Background: About two-third of new drugs reveal low solubility in water due to that; it becomes difficult for formulation scientists to develop oral solid dosage forms with a pharmaceutically acceptable range of therapeutic activity. In such cases, S-SMEEDS are the best carrier used universally for the delivery of hydrophobic drugs. SEDDS were also used, but due to its limitations, S-SMEDDS used widely. These are the isotropic mixtures of oils, co-solvents, and surfactants. S-SMEDDS are physically stable, easy to manufacture, easy to fill in gelatin capsules as well as improves the drug bioavailability by releasing the drug in the emulsion form to the gastrointestinal tract and make smooth absorption of the drug through the intestinal lymphatic pathway. Methods: We took on the various literature search related to our review, including the peer-reviewed research, and provided a conceptual framework to that. Standard tools are used for making the figures of the paper, and various search engines are used for the literature exploration.In this review article the author discussed the importance of S-SMEDDS, selection criteria for excipients, pseudo-ternary diagram, mechanism of action of S-SMEDDS, solidification techniques used for S-SMEDDS, Characterization of SEDDS and S-SMEDDS including Stability Evaluation of both and future prospect concluded through recent findings on S-SMEDDS on Cancer as well as a neoteric patent on S-SMEDDS Results: Many research papers discussed in this review article, from which it was found that the ternary phase diagram is the most crucial part of developing the SMEDDS. From the various research findings, it was found that the excipient selection is the essential step which decides the strong therapeutic effect of the formulation. The significant outcome related to solid-SMEDDS is less the globule size, higher would be the bioavailability. The adsorption of a solid carrier method is the most widely used method for the preparation of solid-SMEDDS. After review of many patents, it is observed that the solid-SMEDDS have a strong potential for targeting and treatment of a different type of Cancer due to their property to enhance permeation and increased bioavailability. Conclusion: S-SMEEDS are more acceptable pharmaceutically as compare to SEDDS due to various advantages over SEDDS viz stability issue is prevalent with SEDDS. A number of researchers had formulated S-SMEDDS of poorly soluble drugs and founded S-SMEDDS as prospective for the delivery of hydrophobic drugs for the treatment of Cancer. S-SMEEDS are grabbing attention, and the patentability on S-SMEDDS is unavoidable, these prove that S-SMEEDS are widely accepted carriers. These are used universally for the delivery of the hydrophilic drugs and anticancer drugs as it releases the drug to the gastrointestinal tract and enhances the systemic absorption. Abstract: Majority of active pharmaceutical ingredients (API) shows poor aqueous solubility, due to that drug delivery of the API to the systemic circulation becomes difficult as it has low bioavailability. The bioavailability of the hydrophobic drugs can be improved by the Self-emulsifying drug delivery system (SEDDS) but due to its various limitations, solid self-micro emulsifying drug delivery systems (S-SMEDDS) are used due to its advantages over SEDDS. S-SMEDDS plays a vital role in improving the low bioavailability of poorly aqueous soluble drugs. Hydrophobic drugs can be easily loaded in these systems and release the drug to the gastrointestinal tract in the form of fine emulsion results to In-situ solubilisation of the drug. In this review article the author's gives an overview of the solid SMEDSS along with the solidification techniques and an update on recent research and patents filled for Solid SMEDDS.


2020 ◽  
Vol 5 (3) ◽  
pp. 224-235
Author(s):  
Harshal A. Pawar ◽  
Bhagyashree D. Bhangale

Background: Lipid based excipients have increased acceptance nowadays in the development of novel drug delivery systems in order to improve their pharmacokinetic profiles. Drugs encapsulated in lipids have enhanced stability due to the protection they experience in the lipid core of these nano-formulations. Phytosomes are newly discovered drug delivery systems and novel botanical formulation to produce lipophilic molecular complex which imparts stability, increases absorption and bioavailability of phytoconstituent. Curcumin, obtained from turmeric (Curcuma longa), has a wide range of biological activities. The poor solubility and wettability of curcumin are responsible for poor dissolution and this, in turn, results in poor bioavailability. To overcome these limitations, the curcumin-loaded nano phytosomes were developed to improve its physicochemical stability and bioavailability. Objective: The objective of the present research work was to develop nano-phytosomes of curcumin to improve its physicochemical stability and bioavailability. Methods: Curcumin-loaded nano phytosomes were prepared by using phospholipid Phospholipon 90 H using a modified solvent evaporation method. The developed curcumin nano phytosomes were evaluated by particle size analyzer and differential scanning calorimetry (DSC). Results: Results indicated that phytosomes prepared using curcumin and lipid in the ratio of 1:2 show good entrapment efficiency. The obtained curcumin phytosomes were spherical in shape with a size less than 100 nm. The prepared nano phytosomal formulation of curcumin showed promising potential as an antioxidant. Conclusion: The phytosomal complex showed sustained release of curcumin from vesicles. The sustained release of curcumin from phytosome may improve its absorption and lowers the elimination rate with an increase in bioavailability.


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