Classified by their mode of action, all important classes of analgesics are presented here, including recent developments that have not yet been introduced to the market. Altogether, more than 300 compounds are described. A carefully designed layout presents the most relevant information at a glance, including compound structure, physical properties, synthesis schemes and clinical uses. Trade names for different countries are also given, allowing quick reference to compounds currently on the market. In addition to proven pain relievers, novel approaches to pain treatment are discussed and drug candidates for future therapies are presented. With its broad scope and extensive compound listings, this is a premier reference source for pain treatment by pharmacological means.