What are analgesic drugs ? How are they classified and when are they usually recommended for use ?

Explanation

Analgesic drugs : The medicines which are used to relieve body pains are called analgesic drugs.
For example : Aspirin and paracetamol.
These drugs are classified as follows :
(i) Non - narcotic (non-addictive) analgesics
(ii) Narcotic drugs.
Non- narotic drugs like aspirin is used in prevention of hert attacks and the narcotic drugs like as morphine is used for the relief of postoperative pain, cardiac pain and pains of terminal cancer.