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Which mathematical model of drug designing helps to study drug release from polymeric system?
power law model
The power law model is useful for the study of drug release from polymeric systems when the release mechanism is not known or when more than one type of phenomenon of drug release is involved (Peppas, 1985, Peppas and Narasimhan, 2014).
How do polymers release drugs?
For polymeric materials the mechanisms of drug release are normally directly linked to drug diffusion, dissolution, and degradation of the carrier matrix. However, other factors, such as interactions of the material and the drug, can also influence the release kinetics.
How is drug release kinetics calculated?
The fundamental principle for evaluation of the kinetics of drug release was offered by Noyes and Whitney in 1897 as the equation (10): dM/dt = KS (Cs с Ct) (1) where M, is the mass transferred with respect to time, t, by dissolution from the solid particle of instanta- neous surface, S, under the effect of the …
What polymer shape is important for drug delivery?
Historically, more traditional drug delivery systems have focused on spherical carriers. However, there is a growing interest in pursuing non-spherical carriers, such as elongated or filamentous morphologies, now available due to novel formulation strategies.
What is Higuchi model in drug release?
Simplified Higuchi model describes the release of drugs from insoluble matrix as a square root of time dependent process based on Fickian diffusion Equation. The data obtained were plotted as cumulative percentage drug release versus square root of time. The slope of the plot gives the Higuchi dissolution constant KH.
What is mathematical model in drug design?
Drug development is the process of bringing a new pharmaceutical drug to the market once a lead compound has been identified through the process of drug discovery [ 6 ]. Mathematical model: A mathematical model is a description of a system using mathematical concepts and language.
What polymers are used in drug delivery?
Biodegradable and bio-absorbable polymers Among the synthetic and biodegradable polymers, aliphatic polyesters such as poly (glycolic acid), poly (lactic acid), poly (caprolactone) and polydioxanone, are most commonly used and applied to drug delivery systems.
Which polymer is used in controlled drug release?
Most of the materials used in swelling-controlled release systems are based on hydrogels, which are polymers that will swell without dissolving when placed in water or other biological fluids. These hydrogels can absorb a great deal of fluid and, at equilibrium, typically comprise 60–90% fluid and only 10–30% polymer.
What is drug release kinetics?
“It is a process by which a drug leaves a drug product. & is subjected to ADME & eventually becoming. available for pharmacological action.” It involves the study of drug release rate, dissolution.
How does polymer drug delivery work?
Polymeric drug delivery system has defined as a formulation or a device that enables the introduction of a therapeutic substance into the body. It improves its safety and efficacy by controlling the rate, time, and place of release of drugs in the body.
What is drug release profile?
Put simply, the optimal drug release profile will be one that ensures that the arterial wall concentrations of the drug are maintained at the therapeutic dose within the target cells for the period required.
How are hydrogels used in drug delivery?
The swelling-controlled drug release from hydrogels uses drugs dispersed within a glassy polymer which when in contact with a bio-fluid begins swelling. The expansion during swelling occurs beyond its boundary facilitating the drug diffusion along with the polymer chain relaxation.