scholarly journals A Review Extended Release Oral Drug Delivery System and Multiparticulate Drug Delivery Systems (MDDS)

Author(s):  
Swapnil B. Khambat ◽  
Shubham A. Kale.

The extended release product will optimize therapeutic effect and safety of a drug at the same time improving the patient convenience and compliance. By incorporating the dose for 24 hrs into one tablet/capsule from which the drug is released slowly. The concept of multiple unit dosage form was initially introduced in the early 1950’s.These forms play a major role in the design of solid dosage form processes because of their unique properties and the flexibility found in their manufacture. These forms can be defined as oral dosage forms consisting of a multiplicity of small discrete units, each exhibiting some desired characteristics. The release of drug from pellets depends on a variety of factors including the carrier used to form pellets and the amount of drug contained in them. Consequently, pellets provide tremendous opportunities for designing new controlled and extended release oral formulations, thus extending the frontier of future pharmaceutical development. The possible mechanism for drug release includes solution/diffusion through the continuous polymer phase or plasticizer channels, diffusion through aqueous pores and osmotically driven release through aqueous pores. To distinguish between these mechanisms, the release rate was studied as a function of coating thickness, plasticizer content and osmotic pressure in the dissolution medium.

2019 ◽  
Vol 9 (1) ◽  
pp. 303-317
Author(s):  
SANTOSH KUMAR RADA ◽  
Annu Kumari

Drug delivery by the oral route is the most prescribable and acceptable route in terms of patient’s compliance. Improvement of patient’s compliance has always a challenge towards the development of oral drug delivery system. In the market different types of oral dosage forms are available in which tablets, capsules, syrups, suspensions are preferred ones. Oral solid drug delivery faces drawback in case of swallowing especially with paediatrics and geriatric psychotic patients. Therefore scientists attracted towards fast mouth dissolving drug delivery systems to encounter existing problems with unique property of palatability and rapid disintegration. The concept of fast dissolving tablet came into existence in late 1970 and further improvements are still going on in connection with its preparation and methodology. Fast dissolving tablets have faster disintegration and dissolution rate and releases within 30 seconds as they come in contact with saliva. These systems also obviate the requirement of carry water during drug administration. This facilitate drug delivery to the patients of dysphasic, psychic, paediatrics, geriatric and bed-ridden, unconscious population. As fast dissolving tablets falls under desired expectation of safer, convenient and economical solid dosage forms, several techniques have been developed to improve disintegration quality in the recent past years. This article mainly focuses on formulation and evaluation technologies with recent advancement made so far in the field of fast dissolving tablets. Keywords: Fast disintegration; Dysphasia; Mouth dissolving; Self-medication.


Author(s):  
Harkirat Singh ◽  
Lakhvir Kaur ◽  
Gurjeet Singh ◽  
RK Dhawan

The oral route is the most popular and favoured method of drug administration. Orodispersible tablets are becoming more common among novel oral drug delivery systems because they increase patient compliance and provide some additional benefits over other oral formulations. They are also strong unit dosage types that, in the presence of saliva, disintegrate in the mouth within a minute due to super disintegrants in the formulation. As a result, this method of drug delivery aids in proper peroral administration of paediatric and geriatric patients who have difficulty swallowing. Various scientists have used various methods to create orodispersible tablets. The compression process is, however, the most popular method of preparation. Molding, melt granulation, phase-transition technique, sublimation, freeze-drying, spray-drying, and the effervescent method are some of the other unique processes. The flavour of these tablets is significant since they dissolve immediately in the mouth. To mask the drug's acidic flavour, a variety of techniques have been used. In this area, a number of scientists have looked at a variety of drugs. They are tested in the fields of stiffness, friability, wetting time, moisture absorption, disintegration test, and dissolution test, much as any other solid dosage types.


2013 ◽  
Vol 2 (10) ◽  
pp. 177-184 ◽  
Author(s):  
Vishal Sachdeva ◽  
Md. Shoaib Alam ◽  
Ramesh Kumar ◽  
Mahesh Kumar Kataria

Oral drug delivery is the most preferred route for the various drug molecules among all other routes of drug delivery, because ease of administration which lead to better patient compliance. So, oral extended release drug delivery system becomes a very promising approach for those drugs that are given orally but having the shorter half-life and high dosing frequency. Recent trends indicate that multiparticulate drug delivery systems are especially suitable for achieving extended release oral formulations with low risk of dose dumping, flexibility of blending to attain different release patterns as well as reproducible and short gastric residence time. The release of drug from pellets depends on a variety of factors including the carrier used to form pellets and the amount of drug contained in them. Consequently, pellets provide tremendous opportunities for designing new controlled and extended release oral formulations, thus extending the frontier of future pharmaceutical development.DOI: http://dx.doi.org/10.3329/icpj.v2i10.16413 International Current Pharmaceutical Journal, September 2013, 2(10): 177-184


2018 ◽  
Vol 2 (2) ◽  
pp. 49-60 ◽  
Author(s):  
Pallavi C. Patil ◽  
S. K. Shrivastava ◽  
Vaidehi S. ◽  
Ashwini P.

This review represents importance of mouth dissolving films as compared to other oral dosage forms. Fast dissolving oral drug delivery system are solid dosage form which disintegrate or dissolve within seconds when placed in the mouth without need of water or chewing. First developed fast dissolving dosage form in formulation and the rapid disintegrating properties were obtained through a special procedure or formulation modification, hence mouth dissolving film is proved to be better alternative in such cases. This fast dissolving drug delivery system is suited for the drugs which undergo high first pass metabolism and is used for improving bioavailability. Mouth dissolving film consists of thin oral strip; which release active ingredients immediately after uptake into oral cavity. In present investigation, an attempt has been made to develop oral fast dissolving film. Availability of larger surface area that leads to rapid disintegrating and dissolution in the oral cavity.


Author(s):  
NAVEEN TAJ S

The purpose of any selected drug delivery system (DDS) is to deliver drug to target site and to get the desired drug concentration for effective therapy. The main purpose of designing controlled or sustained DDS is to decrease the frequency of dosing and maximizing its efficiency by confining the area of action of the drug to a selected region. It is well-identified that solid oral dosage form, particularly tablets, is the most satisfactory form of delivering medication. In addition, some new variations are emerging such as mini tabs which offer more formulation flexibility. Oral controlled release DDS are classified into two categories like single unit dosage forms which include tablets, capsules, and multiple-unit dosage forms include pellets, granules, or mini tablets. Mini tablets are a new development in solid dosage forms and more beneficial and great substitute for granules and pellets. Mini tablets defined as tablets which are having diameter <3 mm and promising patient friendly drug delivery system and more acceptable in small children’s and old age people as they are easy to swallow and offer therapeutic benefits such as manufactured relatively easy, dose and formulation flexibility, combination release pattern, coating, and less solvent requirement. Dose dumping and local irritation can be avoided using mini tablets. This review highlights the various advantages of mini tablets, manufacturing processes, formulation possibilities, and their challenges.


2012 ◽  
Vol 9 (2) ◽  
pp. 213-217 ◽  
Author(s):  
Mehdi Rahimi ◽  
Hamid Mobedi ◽  
Aliasghar Behnamghader ◽  
Alireza Nateghi Baygi ◽  
Houri Mivehchi ◽  
...  

2019 ◽  
Vol 12 (3) ◽  
pp. 109 ◽  
Author(s):  
Bhavesh D. Kevadiya ◽  
Liang Chen ◽  
Lu Zhang ◽  
Midhun B. Thomas ◽  
Rajesh N. Davé

Hydrophobic drug nanocrystals (NCs) manufactured by particle engineering have been extensively investigated for enhanced oral bioavailability and therapeutic effectiveness. However, there are significant drawbacks, including fast dissolution of the nanocrystals in the gastric environment, leading to physicochemical instability. To solves this issue, we developed an innovative technique that involves the encapsulation of nanocrystals in composite spherical microparticles (NCSMs). Fenofibrate (FNB) NCs (FNB-NCs) manufactured by a wet stirred media milling (WSMM) technique and an ionotropic crosslinking method were used for FNB-NC encapsulation within gastroresistant NCSMs. Various solid-state methods were used for characterizing NCSMs. The pH-sensitive NCSMs showed a site-specific release pattern at alkaline pH and nearly 0% release at low pH (gastric environment). This phenomenon was confirmed by a real-time in situ UV-imaging system known as the surface dissolution imager (SDI), which was used to monitor drug release events by measuring the color intensity and concentration gradient formation. All these results proved that our NCSM approach is an innovative idea in oral drug delivery systems, as it resolves significant challenges in the intestine-specific release of hydrophobic drugs while avoiding fast dissolution or burst release.


Author(s):  
Satbir Singh ◽  
Tarun Virmani ◽  
Reshu Virmani ◽  
Geeta Mahlawat ◽  
Pankaj Kumar

The Fast Dissolving Drug Delivery Systems sets a new benchmark was an expansion that came into existence in the early 1980’s and combat over the use of the different dosage form like tablets, suspension, syrups, capsules which are the other oral drug delivery systems. Fast Dissolving Drug Delivery System (FDTS)  has a major advantage over the conventional dosage forms since the drug gets rapidly disintegrated and dissolves in the saliva without the use of water .In spite of the downside lack of immediate onset of action; these oral dosage forms have valuable purposes such as self medication, increased patient compliance, ease of manufacturing and lack of pain. Hence Fast Disintegrating Tablets (FDTS) technology has been gaining importance now-a-days with wide variety of drugs serving many purposes. Fast Disintegrating Tablets (FDTS) has ever increased their demand in the last decade since they disintegrate in saliva in less than a minute that improved compliance in pediatrics and geriatric patients, who have difficulty in swallowing tablets or liquids. As fast dissolving tablet provide instantaneous disintegration after putting it on tongue, thereby rapid drug absorption and instantaneous bioavailability, whereas Fast dissolving oral films are used as practical alternative to FDTS. These films have a potential to deliver the drug systemically through intragastric, sublingual or buccal route of administration and also has been used for local action. In present review article different aspects of fast dissolving  tablets and films like method of preparations, latest technologies, evaluation parameters are discussed. This study will be useful for the researchers for their lab work.  


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