The need for pharmacoepidemiology, defined as the study of the use of
and the effects of drugs in large numbers of people, will increase exp
onentially in the next decade both in developed and in developing coun
tries, Within Europe, a common market of over 350 million consumers, r
egulations and guidelines related to drug use were formulated, especia
lly with respect to post-marketing surveillance and the detection, int
erpretation and management of rare but serious drug related adverse ev
ents. The activities of international organizations like the World Hea
lth Organization in this context are briefly addressed. In the Europea
n Union a choice has been made by the regulatory authorities for spont
aneous reporting systems as a minimal requirement for post marketing s
urveillance in all member states. The French pharmacovigilance system
has to some extend functioned as a blueprint for a common European pos
t marketing surveillance system. Therefore the organization of this Fr
ench system is explained in some detail. Also in this context the need
for drug utilization studies to get quantitative information about dr
ug use is stressed. For the creation of the databases needed for case
control and cohort studies a variety of approaches is used in differen
t countries, all with their own advantages and shortcomings. Some exam
ples from England and the Netherlands are given, The efforts of the Eu
ropean Commission and various scientific organizations aiming to promo
te the harmonization of pharmacovigilance actions in Europe are discus
sed. Finally, some guidelines for good pharmacovigilance practice are
suggested. (C) 1997 Elsevier Science B.V.