Organic Pharmaceutical Chemistry

DRUGS and PHARMACEUTICALS

Analgesic Drugs

An analgesic or pain killer is any member of the group of drugs used to achieve analgesia , relief from pain. The English word for pain is derived form the old French word 'piene' , Latin word 'poene' and Ancient Greek word 'poine'.

Causes Of Pain:

Following can be the reasons for any kind of pain;

Stress
Tension
Coldness
Lack of Oxygen
Hotness
Carrying heavy loads

Definition Of Analgesics

These are the class of compounds which relief the pain without the production of unconsciousness.

There action may

Peripheral
Central
Peripheral + Central

Classification On The Basis Of Cause Of Pain

On the basis of cause of pain the compounds are classified the following two classes

True Analgesics: Those compounds which relief the pain may or may not be affecting the cause of pain called True Analgesics.

False Analgesics : Those compounds which relief the pain by indirect action of reducing or removing the cause of the pain called False Analgesics.

Classification On The Basis Of Mode Of Action

These compounds are also classified on the basis of mode of action . These are

Narcotic Analgesic ( Addiction ) Mode of action is Central

Non-Narcotic Analgesics ( Non- Addiction ) Mode of action is Central + Peripheral

Difference Between Anesthetic and Analgesics

ANESTHETIC produce loss of sensation by blocking the conduction of pain impulse.
ANALGESICS decrease the perception of pain impulse , it do not block the pain stimulant.

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