**Analgesics: New Target and Sources**

Mohammad Saleem and Huma Naz

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/67853

#### Abstract

The aim of this chapter is to describe targets for analgesic drugs, including currently available target sites and possible future target sites for pain and information regarding analgesia for complete understanding of pain originating mechanism, pathways and related theories to recognize. This chapter fully describes methods for determination of analgesic effects of synthetic and natural substances by inducing pain in different models and methods of pain induction.

Keywords: pain, analgesics, targets, sources
