This A-Z reference book is fully cross-referenced and covers all the main medical preparations that are available either over the counter or on prescription. It gives chemical names, generic and brand names, and describes uses and active constituents. An explanation of potential side-effects is given, possible problems caused by allergic reactions and any other complications associated with drug-taking. There is also information on people who should be wary of taking certain drugs, such as pregnant women, diabetics and patients with kidney problems. An introductory section explains what drugs are, how they are prepared and how they work.