Types of drug delivery systems - apologise, but
Electronic cigarettes or ENDS electronic nicotine delivery systems are devices whose function is to vaporize and deliver to the lungs of the user a chemical mixture typically composed of nicotine, propylene glycol and other chemicals, although some products claim to contain no nicotine. A number of ENDS are offered in flavours that can be particularly attractive to adolescents. Electronic cigarettes e-cigs are the most common prototype of ENDS. Each device contains an electronic vaporization system, rechargeable batteries, electronic controls and cartridges of the liquid that is vaporized. The manufacturers report that the cartridges typically contain between 6 and 24 mg of nicotine, but sometimes can contain more than mg. In the form of tobacco products, nicotine is an addictive chemical that in excessive amounts can be lethal 0. Most ENDS are shaped to look like their conventional tobacco counterparts e. They are also sometimes made to look like everyday items such as pens and USB memory sticks, for people who wish to use the product without other people noticing. The potential risks they pose for the health of users remain undetermined.Types of drug delivery systems Video
Controlled Release Drug Delivery Systems types of drug delivery systems
Prefer your medication in bottles?
Liposomes are spherical vesicles consisting of one or more concentric phospholipid bilayers enclosing an aqueous core. Being both nontoxic and biodegradable, liposomes represent a powerful delivery system for several drugs.
They have improved the therapeutic efficacy of drugs through stabilizing compounds, overcoming obstacles to cellular and tissue uptake and increasing drug biodistribution to target sites in vivo, while minimizing systemic toxicity. This review offers an overview of liposomes, thought the exploration of their key fundamentals.
Prefer your meds in bottles?
Initially, the main design aspects to obtain a successful liposomal formulation were addressed, following the techniques for liposome production and drug loading. Before application, liposomes required an extensive characterization to assurance in vitro and in vivo performance. Thus, several properties to characterize liposomes were explored, such as size, polydispersity index, ddug potential, shape, lamellarity, phase behavior, encapsulation efficiency, and in vitro drug release.
Topics related with liposomal functionalization and effective targeting strategies were also addressed, as well as stability and some limitations of liposomes.
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Finally, this review intends to explore the current market liposomes used as a drug delivery system in different therapeutic applications. Keywords: Drug delivery; Liposome characterization; Liposome production; Liposomes; Market liposomes.
Abstract Liposomes are spherical vesicles consisting of one or more concentric phospholipid bilayers enclosing an aqueous core. Publication types Review.]
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