These nanocarriers can serve as an intelligent system by considering the differences of tumor microenvironment from healthy tissue, such as low pH, low oxygen level, or high enzymatic activity of matrix metalloproteinases. Pellets intended for oral use are administered in the form of hard gelatin capsules or disintegrating tablets Figure 1 which quickly liberate their contents in the stomach and gets distributed throughout the gastrointestinal tract without loss of the depot effect 2, 3 ; as the sub unit acts as self-contained depots. Pellets are evaluated for certain quality measures, which reflect the suitability and endurance of material during various operations like filling, transportation and handling. In addition, the challenges in applying drug delivery for efficacious cancer therapy, including physical barriers, tumor heterogeneity, drug resistance, and metastasis, are discussed along with future perspectives of drug delivery in cancer therapy. The main aim in the drug therapy of any disease is to attain the desired therapeutic concentration of the drug in plasma or at the site of action and maintain it for the entire duration of treatment.

The second is cooling portion at which the droplets solidify and form spherical pellets; having temperature 0 o C to o C maintained using cooling mixture such as acetonitrile – dry ice, or salt-ice. The major challenge faced by today’s pharmacologist and formulation scientist is ocular drug delivery. Aerosol administration of peptide-based drugs plays an important role in the treatment of pulmonary and systemic diseases and the unique cellular properties of airway epithelium offers a great potential to deliver new compounds. The biological aspects covered include gastrointestinal transit and the enzymatic degradation of pectin. Influence of formulation and process parameters on pellet production by powder layering technique. Mucoadhesion is the process of binding a material to the mucosal layer of the body.

Anterior segment drug delivery advances are witnessed by modulation of conventional topical solutions with permeation and viscosity enhancers.

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Pt-coated metal foam is used as a catalytic reforming element, which reduces the period of each delivery cycle. This review outlines in detail the various production, characterization, sterilization, and stabilization techniques for SLNs. Therefore, mucoadhesive polymeric approach can be successfully used to enhance the retention of the drug on nasal mucosal surface.


multiparticulate drug delivery system thesis

This fhesis provides an overview on the general characteristics of polyaminoacids and polypeptides and briefly discusses multiparitculate synthetic pathways for their production. Although calcium silicate-based placebo beads were shown to be ineffective cushioning agents in blends with Surelease R -coated APAP beads, they were found to be very compactibile when used alone and gave tablet crushing strength values between 14 and 17 kP.

In this work, bovine serum albumin BSA was adopted as a model protein.

Ablation is a reliable method for generating PWs with consistent characteristics. Currently available ultrasound-triggerable vehicles are first described, with particular reference to the ultrasonic mechanism that can activate release and the suitability of the size range of the vehicle used for drug delivery. Utilising both natural and synthetic polymers, mucoadhesive drug delivery is a method of controlled drug release which allows for intimate contact between the polymer and a target tissue.

Pellets offer greater flexibility in the design and development of active ingredient into oral dosage forms like tablets, capsules and suspensions with significant therapeutic advantages over single units 4, 5. The surface tension of the liquid and the negative suction pressure generated at the liquid bridges causes attraction between the powder particles.

Topical administration has been gaining attention over the last few years. Ultrasound-enhanced drug delivery for cancer.

Superhydrophobicity is a property of material surfaces reflecting the ability to maintain air at drugg solid-liquid interface when in contact with water. Such systems for drug carriage and targeted release represent a novel disease combating strategy being applied to a spectrum of human disorders.

multiparticulate drug delivery: Topics by

The concentration of the binder is based on choice of the drug because it influences physical as well as mechanical properties of pellets and drug release from coated pellets. A wide range thewis PLGA-based drug delivery systems have been reported for the treatment or diagnosis of various diseases and disorders.

Many potential neuroprotective agents are not suitable for traditional oral or drop formulations.

This review focuses thrsis the status and development of inorganic nanostructures, including silica, quantum dots, gold, carbon-based and magnetic iron oxide-based nanostructures, as carriers for chemical and biological drugs. The most of ocular diseases are treated with topical application of conventional formulation, i. Diffusion of solution through the continuous plasticized polymer phase ; assumes that the polymer forms a phase in which the plasticizer and other additives are homogeneously dispersed.


Capsules containing a combination of two MDDS with different release profile of BZ showed promising properties to improve Chagas disease pharmacotherapy in the preliminary in vivo assay performed, in which the BZ-loaded MDDS exhibited efficacy to reduce parasitemia, while decreasing the levels of liver injury markers in comparison to BZ conventional treatment.

multiparticulate drug delivery system thesis

Manufacturing of pellets include different techniquesbased on the application and the requirement of manufacturers 13 Figure 6. Ocular drug delivery systems: Prolonged release capsules divided and monolithic forms. The brief review on pellets and pelletization concludes pelletized dosage forms as one of the most promising and efficient pathway of novel and multiparticulate drug delivery systems.

The design of nanocarriers for cell-mediated multipaticulate delivery may differ from those used multiparticulatee conventional drug delivery systems; nevertheless, engaging different defense mechanisms into drug delivery may open new perspectives for the active delivery of drugs. Topical drug delivery systems: Core or uncoated pellets are of uniform spherical shape and smooth surface with improved flow characteristics; high physical strength and integrity; good hardness and low friability for ease and superior properties of coating.

These new technologies are aimed at increasing clinical efficacy by offering multiple delivery options and are capable of managing IOP for several months. SLNs have another advantage of allowing autoclave sterilization, a necessary step towards formulation of ocular preparations.

However, dissolving MNs require many htesis to be dissolved in the skin and typically have difficulty being fully inserted into the skin, which may lead to the low drug delivery efficiency.

Many inorganic nanostructure-based drug delivery platforms have been prepared. Akhlaquer Rahman, Alka Ahuja, S.