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Liposomes as Drug Delivery Systems

The usefulness of liposomes in pharmacy and medicine as carriers of active substances has been postulated since the early 1960s, when the phenomenon of encapsulation of some chemical compounds in lipide microspheres was recognised. However, it was only in the past few years that the objective proof of therapeutic efficacy when using this method of drug delivery was realised and the first launches of liposomal drug dosage forms took place.

Basic Information on Liposomes

Liposomes are microscopic or submicroscopic structures of 10nm to 20mm in diameter. They are made up of one or many concentrically arranged lipid bilayers constituting an envelope. The basic matter of liposomes are amphiphilic compounds having clearly separated hydrophilic and hydrophobic centres. Hydrophilic components of lipides of bilayer are directed towards aqueous phases (external and internal), whereas hydrophobic components of both lipide layers are directed towards one another, forming the internal layer of a membrane.


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By Dr Piotr Slifirski, Head of the Pharmaceutical Department
at the Pharmaceutical Research Institute in Poland Dr Piotr Slifirski is a Head of Pharmaceutical Department at the Pharmaceutical Research Institute in Warsaw, Poland.
Piotr studied Pharmacy at the Academy of Medicine in Warsaw. He holds a PhD in Pharmacy from the Academy of Medicine in Wroclaw, Poland, and specialises in drugs technology.

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Dr Piotr Slifirski
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