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Routes of administration of medicines

August 29, 2012

Dominic Parry

A crude way of looking at how we get medicines into the body is this – “if there’s a hole then we’ll put medicines in it and if there is not a hole, then we’ll go and make one”!  The intake of medicines is achieved either via absorption or direct injection.  With absorption the product might be (for example) put on the eye or skin, ingested and then absorbed in the intestine or breathed in and absorbed in the nose or lungs.  Most medicines are taken this way.  With direct injection the body is injected directly into the bloodstream or other body fluid.  There are a wide range of methods of administration of medicines.  These are as follows: Read more

Main modes of drug action

August 29, 2012

Dominic Parry

This posts provide a very simple overview of the main modes of actions of drugs.  There are three ways in which they work:

  1. Replacing chemicals that are deficient.
  2. Interfering with cell function.
  3. Acting against invading organisms or abnormal cells.

These are now described in a little more detail. Read more

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