What are analgesics?How are they classified?

Explanation

Analgesics:These are to reduce or totally abolish pain without causing impairment of consciousness,mental confusion,incoordination,paralysis,disturbances of nervous system etc.Analgesics are classified as
i)Narcotic analgesics:These are most potent and clinically useful agents causing depression of central nervous system and at same time act as strong analgesics.
E.g:Morphine,codeine etc.
ii) Non-narcotic analgesics:THese drugs are analgesics but they have no addictive properties.Thei-r analgesic use is limited to mild aches and pains.
E.g:aspirin,Ibuprofwen etc.