European Agency for the Evaluation of Medical Products (EMEA)
http://www.emea.eu.int/htms/human/drugalert/drugalert.htm
http://www.emea.eu.int/index/indexh1.htm

Agencia Española del Medicamento
http://www.agemed.es

Food and Drug Administration
http://www.fda.gov/

Agence Française de Securité Sanitaire des Produits de Santé
http://agmed.sante.gouv.fr/

Medicines and Healthcare products Regulatory Agency (MHRA)
http://www.mhra.gov.uk/

Uppsala Monitoring Center
http://www.who-umc.org/umc.html