This comprehensive encyclopedic reference provides rapid access to focused information on molecular pharmacology for research scientists, clinicians and advanced students. The second edition has been extended by a number of essays and is now published in two volumes, available both in print and as a fully searchable and hyperlinked electronic online edition. With the A-Z format of over 2,000 entries, around 350 authors provide a complete reference to the area of molecular pharmacology.The book combines the knowledge of classic pharmacology describing drug action as well as the more recent approach of the precise analysis of the molecular mechanisms by which drugs exert their effects.Short keyword entries define common acronyms, terms and phrases. In addition, detailed essays provide in-depth information on drugs, cellular processes, molecular targets, techniques, molecular mechanisms, and general principles.Each essay is well-structured, with extensive cross-referencing between all entries.