Controlled release drug delivery systems 1 are those dosage formulations designed to release an active ingredient at rates, which differ significantly from their corresponding conventional dosage forms. The controlled release drug delivery systems are aimed at controlling the rate of drug delivery, sustaining the duration of therapeutic activity and/or targeting the delivery of the drug to a ti...

Drug-loaded hydrogels provide a means to deliver pharmaceutical agents specific sites within the body at controlled rate. The aim of this paper is understand how drug release can be achieved by tuning initial distribution molecules in hydrogel. A mathematical model presented for spherical drug-loaded captures nonlinear elasticity polymer network and thermodynamics swelling. By assuming that are...

Drug carriers capable of releasing drugs at a constant rate, or following zero-order kinetics, can lead to the best control of plasma drug concentration. Here we demonstrated that zero-order release of polyphenolic drugs, including tannic acid, epigallocatechin gallate, proanthocyanidins, and theaflavin-3'-gallate, could be achieved using hydrogen-bonded layer-by-layer films as the drug carrier...

Objective(s):The aim of this study was to prepare electrospun nanofibers of celecoxib using combination of time-dependent polymers with pectin to achieve a colon-specific drug delivery system for celecoxib. Materials and Methods:Formulations were produced based on two multilevel 22 full factorial designs. The independent variables were the ratio of drug:time-dependent polymer (X1) and the amoun...

blood pressure rises rapidly upon awakening and maybe responsible, in part, for the increased incidence of myocardial infarction and stroke during the morning hours. the aim of the present study was, therefore, to develop a novel chronotherapeutic formulation of metoprolol tartrate (mt) for night time dosing providing maximum effect in the morning hours. core tablets contained mt, sodium chlori...

The term “immediate release” pharmaceutical formulation includes any in which the rate of release drug from or absorption drug, is neither appreciably, nor intentionally, retarded by galenic manipulations. These tablets disintegrate rapidly and get dissolved to medicaments. It may be provided for way an appropriate pharmaceutically acceptable diluent carrier, carrier does not prolong, appreciab...

Extended-release matrix tablets of diltiazem hydrochloride (DTZ) were prepared using waxy materials alone or in combination with Kollidon SR. Matrix waxy materials were carnauba wax (CW), bees wax (BW), cetyl alcohol (CA) and glyceryl monostearate (GMS). Dissolution studies were carried out by using a six stations USP XXII type 1 apparatus. The in vitro drug release study was done in 1000 ml ph...

background indomethacin is a nsaid (non-steroidal anti-inflammatory drug) that is used in treatment of pain and inflammatory. immediate and sustained release products of this drug have side effects, so a proper replacement is needed. use of the medicine via topical and cutaneous routs has advantages such as avoiding side effects on gastrointestinal; and supplying an amount of medicine in plasma...

Silicone has been utilized as a carrier material for sustained release system of lipophilic drugs. Extensive studies revealed that drug release rate is influenced by factors such as physicochemical properties of the drug and additives.(1-5)) When a lipophilic drug is highly potent at low concentrations, the drug release rate should be strictly controlled so as to avoid side effects. In this stu...

the aim of the current study was to design a porous osmotic pump–based drug delivery system for controlling the release of buspirone from the delivery system. the osmotic pump was successfully developed using symmetric membrane coating. the core of the tablets was prepared by direct compression technique and coated using dip-coating technique. drug release from the osmotic system was studied us...